CA2453674A1 - Point to multipoint system and process for the transmission over the electricity network of digital data - Google Patents

Point to multipoint system and process for the transmission over the electricity network of digital data Download PDF

Info

Publication number
CA2453674A1
CA2453674A1 CA002453674A CA2453674A CA2453674A1 CA 2453674 A1 CA2453674 A1 CA 2453674A1 CA 002453674 A CA002453674 A CA 002453674A CA 2453674 A CA2453674 A CA 2453674A CA 2453674 A1 CA2453674 A1 CA 2453674A1
Authority
CA
Canada
Prior art keywords
data
electricity network
point
head
digital
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002453674A
Other languages
French (fr)
Other versions
CA2453674C (en
Inventor
Jorge Vicente Blasco Claret
Juan Carlos Riveiro Insua
Nils Hakan Fouren
Carlos Pardo Vidal
Juan Miguel Gavillero Martin
Jose Luis Gonzalez Moreno
Francisco Javier Jimenez Marquina
Francisco Jose Andres Navarro
Victor Dominguez Richards
Maria Teresa Forment Tarrega
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MaxLinear Hispania SL
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2453674A1 publication Critical patent/CA2453674A1/en
Application granted granted Critical
Publication of CA2453674C publication Critical patent/CA2453674C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/542—Systems for transmission via power distribution lines the information being in digital form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H04L5/0046—Determination of how many bits are transmitted on different sub-channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
    • H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5495—Systems for power line communications having measurements and testing channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

The system enables bidirectional communication between a center and a plurality of users via the electric network and is characterized in that low and high speed communication can be established to provide multiple high-quality services to the users. The system comprises means to perform network and frequency time-sharing and/or orthogonal frequency-division multiple access (OFDMA).

Claims (34)

1.- SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT TO
MULTIPOINT OVER THE ELECTRICTY NETWORK, that comprises a communication in the downstream channel, determined by a link from the head-end to various different users, and a communication in the upstream channel, determined by a link from each of the users to the head-end, where the communication medium is the electricity network (5) and communication is achieved by means of an OFDM modulation (orthogonal frequency division multiplexing) to obtain OFDM symbols, where both the head-end and the users contain a transmitter/receiver that includes a medium access control module (MAC) (14) to provide a master-slave communication, as well as means to add/extract a cyclic prefix (31, 55) in the OFDM symbols and means of converting the OFDM symbols from frequency to time and from time to frequency (30, 56), and digital-to-analog (34) and analog-to-digital (52) converters; characterized in that the transmitter(1)/receiver(2) of the head-end and the users comprises:
means to adapt the digital signal to the electricity network that provide:
an OFDM modulation with a carrier width reduced to at least 1,5 KHz and with the number of carriers increased to at least 500 carriers for each 10MHz to strengthen against selective frequency fadings arising from the varying cable lengths in the electricity network between each user and the head-end and to strengthen against interferences in the electricity network;
a cyclic prefix (65) of long duration, at least 7 microseconds, to recover the signal;
where the transmitter (1) includes means of sharing the medium in time TDMA (Time Division Multiple Access), in frequency FDMA (Frequency Division Multiple Access), and/ or in Orthogonal Frequency Division Multiple Access (OFDMA), of the data transmitted in both the upstream and downstream channels for multiple users;
where the receivers (2) include means to process the information corresponding to the data transmitted in the communication in the time and frequency domains, to reach maximum throughput;
means to calculate without interruption the SNR (signal to noise ratio) (57) for each of the carriers in the OFDM modulation in both the upstream and downstream, so that different users located at differing distances from the head-end use dynamically different carriers in the same OFDM symbol, with a variable number of bits per carrier, maximizing the throughput of the channel in time;
where the transmitter includes means (23) to assign without interruption the carriers and a particular number of bits per carrier to each of the carriers in the OFDM modulation from the result of the SNR
calculation, and means to associate the number of the bits to be transmitted to each designated carrier (83) to achieve the transmission taking into consideration the changes suffered by the electricity line (5) response at different distances between the users and the head-end in each frequency, and to adapt transmission speed in function of the SNR calculation and the quality of transmission required for each user;
means to translate the frequency (33) to user bandwidths higher than base band, so as to be adapted to the electricity network and to allow the use of spectral zones superior to base band.
2.- SYSTEM FOR THR DIGITAL TRANSMISSION OF DATA, POINT TO
MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said means of frequency translation are constituted by IQ (in phase and quadrature) modulators (33) and demodulators (53).
3. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 2, characterized in that said IQ modulators (33) and demodulators (53) are digital.
4. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 2, characterized in that said IQ modulators (33) and demodulators (53) are analog.
5. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said means of frequency translation (33, 53) comprise a filtering process and the selection of one of the harmonics, starting from the second harmonic, in the spectrum of the OFDM symbol at the exit of the digital-to-analog converter.
6. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 5, characterized in that it includes means of pre-equalizing the selected harmonic to avoid that different frequencies receive different treatment by the action of the digital-to-analog converter (34).
7. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claims 2 and 5, characterized in that said frequency translation (33) made by the transmitters places the signals transmitted through the network above 1 MHz.
8. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said means of making the frequency to time conversion of the OFDM symbols in the transmitters (30) are set up by a device that makes the complex form of the inverse of the discrete Fourier transform (IDFT), and because the time to frequency conversion made by the receivers occurs via a device (56) that makes the complex form of the discrete Fourier transform (DFT).
9. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claims 3 and 8, characterized in that said complex DFT
(56) is used in combination with digital IQ modulation (53) including interpolators and decimators to reduce the number of points needed in the discrete Fourier transform, and to simplify the system hardware.
10. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that both the head-end and the users contain the means to dynamically add FEC (forward error correction) information (20) that allocates data blocks which includes information for the correction/detection of errors, so that the FEC in each block and for each user varies in order to adapt it to the different user situations at different distances and using different carriers.
11. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that both the head-end and the users include the means of interleaving in time (22), to distribute the data of the information transmitted in such a way that the errors produced by noise in the network are spread over various data blocks in reception.
12. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claims 10 and 11, characterized in that said FEC code (20) and the interleaving in time (22) change for each packet of information to be transmitted and for each user, to adapt them to the communication with different users situated at different distances from the head-end and using different carriers of the OFDM modulation.
13. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT

TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and users transmitters (1) comprise the means to allow analog processing (8) in order to make the transformation from the digital to analog domain and that includes a digital-to-analog converter (34), the means to establish the voltage and power of the signal (36) to be sent, and the means of filtering to adapt the signal to be transmitted over the electricity network (5); while the head-end and user receivers (2) include the means of analog processing (11) to make the transformation from the analog to digital domain by means of an analog-to-digital converter (52) to recover the original digital signal.
14. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and user transmitters (1) comprise an interface connection (12) with an external equipment.
15. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 13, characterized in that said head-end and user transmitters (1) comprise the means of scrambling (24) to avoid that certain data patterns produce signals in phase with peak voltages higher to those admissible by the analog processing means (8); and where the head-end and user receivers (2) include the means of de-scrambling (59) to obtain the original data previous to the scrambling process.
16. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and user transmitters (1) include the means of interleaving in frequency, made up by a tone ordering and association module (23) so as to assign the OFDM carriers in the upstream/downstream carriers to each one of the users and to assign without interruption the number of bits associated with each carrier in the OFDM modulation.
17. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 16, characterized in that said means of associating the bits to be transmitted with each carrier so as to make the transmission comprise a variable constellation encoder (28), that encodes the data to be sent with the number of bits specified for each carrier, wherein the variable encoder is constituted by one, various or all of the following modulations:
m-DPSK (differential phase modulation), m-PSK (phase modulation), m-QAM (quadrature amplitude modulation), (m, n)-APSK (amplitude and phase modulation).
18. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 17, characterized in that said head-end and user receivers include a variable constellation decoder (58) that decodifies the received data with the number of bits specified for each carrier, wherein the variable decoder is constituted by one, various or all or the following demodulators:
m-DPSK (differential phase demodulation) m-PSK (phase demodulation) m-QAM (quadature amplitude demodulation) (m, n)-APSK (amplitude and phase demodulation).
19. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 16, characterized in that said head-end and user receivers include the complementary tone ordering and association module (60) to the tone ordering and association module in the head-end and user transmitters.
20. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and user receivers include the means of pre-equalization (57), to modify the amplitude and phase of the received signals
21. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 13, characterized in that said analog processing means include furthermore, amplifiers and/or attenuators (36, 50), connected to a hybrid circuit and to a separator (4) to allow the introduction/extraction of the signal in/from the electricity network (5) eliminating the component that is carried by the network (50-60 Hz).
22. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and users comprise a module to control the synchronization (27) between the transmitter (1) and the receiver (2), making the error correction in frequency and windowing the signal in time.
23. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 19, characterized in that it includes a frequencial processing module (29) that is made up of a module for power pre-equalization and by a rotor for the correction of the rotated angle of the constellations to be sent through the electricity network in the case of the emitter and receiver of the users; and a the synchronization controller, in the head-end receiver, that is linked to a frequencial processing module that comprises a power pre-equalization module; all of this to avoid that the transmitter/receiver of the head-end has to make any correction of the rotated angle of the constellation in the upstream channel.
24. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and user receivers (2) include a frequency equalizer (FEQ) (57) that makes the equalization in each one of the carriers both in the upstream and downstream, to allow a coherent demodulation of the information transmitted in these carriers.
25. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 22, characterized in that said error correction in frequency is made by altering the sampling speed in the master clocks (38) of the analog-to-digital and digital-to-analog converters (34).
26. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 22, characterized in that said correction of errors in frequency is made by resampling the digital signal obtained in the receiver.
27. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 22, characterized in that said head-end and user receivers include the means to extract the cyclic prefix (65) of the OFDM symbols received from the information obtained in the synchronization module, in order to eliminate the interference between symbols in reception produced by the echoes in the multipath propagation of the signal through the electricity network (5), and to obtain the original OFDM symbols transmitted.
28. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said SNR (80) is calculated from the difference of the signal expected and the signal received over a certain time period, and because the transmission speed is adapted by comparison of SNR (80) with certain previously fixed thresholds (76, 77, 78, 79) that are a function of the different modulation constellations used in the system and the maximum rate of errors wanted at any time, wherein the thresholds (76, 77, 78, 79) previously established preferably contain histeresis.
29. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said head-end and user MAC
(14) include means of informing through the downstream of which user may transmit by the upstream in each time period and which carriers it can use.
30. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said user and head-end MAC
(14) includes the means of inserting a header (17) in the data to be transmitted (15), indicating from whom and to whom the data is directed and the form in which said data has been coded.
31. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 1, characterized in that said upstream and downstream channels are separated in frequency, time code or any combination of them.
32. - SYSTEM FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, according to claim 29 and 30, characterized in that said information transmitted in the downstream channel is received by all the user receivers, so that these contain means to determine whether the information received should be recovered.
33. - PROCESS FOR THE DIGITAL TRANSMISSION OF DATA, POINT
TO MULTIPOINT OVER THE ELECTRICITY NETWORK, that comprises a communication in the downstream channel, determined by a link from the head-end to various different users, and a communication in the upstream channel, determined by a link from each of the users to the head-end, where the communication medium is the electricity network (5) and communication is achieved by an OFDM modulation (orthogonal frequency division multiplexing) to obtain OFDM symbols, where both the head-end and the users transmit/receive with a medium access control (MAC) (14) to provide a master-slave communication, and add/extract a cyclic prefix (31, 55), in the OFDM symbols and convert the OFDM symbols from frequency to time and from time to frequency (30, 56), and accomplish digital-to-analog (34) and analog-to-digital (52) conversions; characterized in that said process for the digital transmission of data comprises the following phases:
adaptation of the transmissible digital data signal and multiplexing of this signal (12) to create the transmissible frames, inserting enough redundancy (20) to make the correction/detection of errors in reception, interleaving in time (22) to diminish and make easy the correction of errors, measurement of the SNR (80), dynamically assignation of the number of bits per carrier (23) in function of the result of the measurement of the SNR and the quality required by each user, coding each one carrier of the OFDM modulation (28) with the variable number of bits assigned per carrier, transforming the coded signal from the frequency to the time domain (30) using the inverse fast Fourier transformation (IFFT), adding the cyclic prefix to the signal in time (31) to avoid that the echoes produced by the multipath propagation, that happens to the signal in the electricity network, damage the recovery of the OFDM
symbols, translation of the signal obtained in frequency (33) in order to use bands higher than base band and to adapt the transmission to the electricity network and to use spectral superior bands than base band, converting the digital signal to an analog signal (34) and adapting it (35, 36) in order to send it through the network.
34. - PROCESS FOR THE DIGITAL TRANSMISSION OF DATA, POINT TO MULTI-POINT OVER THE ELECTRICITY NETWORK, according to claim 33, characterized in that it includes an inverse process that occurs in reception (2).
CA2453674A 2000-12-18 2001-12-18 Point to multipoint system and process for the transmission over the electricity network of digital data Expired - Fee Related CA2453674C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ESP200003024 2000-12-18
ES200003024A ES2184587B1 (en) 2000-12-18 2000-12-18 SYSTEM AND PROCEDURE FOR DIGITAL TRANSMISSION OF DATA POINT TO MULTIPOINT ON ELECTRICAL NETWORK.
PCT/ES2001/000490 WO2002051024A1 (en) 2000-12-18 2001-12-18 Digital point-to-multipoint data transmission system on an electric network

Publications (2)

Publication Number Publication Date
CA2453674A1 true CA2453674A1 (en) 2002-06-27
CA2453674C CA2453674C (en) 2010-06-22

Family

ID=8496039

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2453674A Expired - Fee Related CA2453674C (en) 2000-12-18 2001-12-18 Point to multipoint system and process for the transmission over the electricity network of digital data

Country Status (19)

Country Link
US (1) US7391714B2 (en)
EP (1) EP1351408B1 (en)
JP (1) JP4263483B2 (en)
KR (1) KR100722810B1 (en)
CN (1) CN100531000C (en)
AT (1) ATE369666T1 (en)
AU (2) AU2002216122B2 (en)
BR (1) BRPI0116692B1 (en)
CA (1) CA2453674C (en)
CY (1) CY1107070T1 (en)
DE (1) DE60129845T2 (en)
DK (1) DK1351408T3 (en)
EA (1) EA005957B1 (en)
ES (2) ES2184587B1 (en)
HK (1) HK1059512A1 (en)
IL (2) IL156440A0 (en)
MX (1) MXPA03005314A (en)
PT (1) PT1351408E (en)
WO (1) WO2002051024A1 (en)

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10138650A1 (en) * 2001-08-07 2003-02-27 Fraunhofer Ges Forschung Method and device for encrypting a discrete signal and method and device for decoding
JP2004158901A (en) * 2002-11-01 2004-06-03 Kddi Corp Transmission apparatus, system, and method using ofdm and mc-cdma
EP1608094A4 (en) * 2003-03-10 2010-04-28 Panasonic Corp Ofdm signal transmission method, transmission device, and reception device
US7697448B2 (en) * 2003-04-03 2010-04-13 Broadcom Corporation Providing link quality intelligence from physical layer to higher protocol layers
CA2427403C (en) * 2003-04-21 2008-10-28 Regents Of The University Of Minnesota Space-time-frequency coded ofdm over frequency-selective fading channels
US8064528B2 (en) 2003-05-21 2011-11-22 Regents Of The University Of Minnesota Estimating frequency-offsets and multi-antenna channels in MIMO OFDM systems
US7590188B2 (en) * 2003-05-21 2009-09-15 Regents Of The University Of Minnesota Channel estimation for block transmissions over time- and frequency-selective wireless fading channels
IL156540A0 (en) 2003-06-19 2004-01-04 Zion Hada Ofdma communication system and method
EP1509002B1 (en) * 2003-08-19 2007-10-24 Sony Deutschland GmbH RF Coverage extension for wireless home networking systems
US11152971B2 (en) * 2004-02-02 2021-10-19 Charles Abraham Frequency modulated OFDM over various communication media
US7672384B2 (en) * 2004-03-12 2010-03-02 Regents Of The University Of Minnesota Bandwidth and power efficient multicarrier multiple access
US8046488B2 (en) * 2004-05-21 2011-10-25 Intel Corporation Dynamically modulating link width
FR2871323B1 (en) * 2004-06-03 2006-07-28 Sagem METHOD FOR AUTOMATIC CONFIGURATION OF A NETWORK HEAD DEVICE
US8582596B2 (en) 2004-06-04 2013-11-12 Qualcomm Incorporated Coding and modulation for broadcast and multicast services in a wireless communication system
US7391317B2 (en) 2004-09-08 2008-06-24 Satius, Inc. Apparatus and method for transmitting digital data over various communication media
US7590045B2 (en) * 2005-01-11 2009-09-15 Samsung Electronics Co., Ltd Apparatus and method for transmitting fast feedback information in a wireless communication system
US7804763B2 (en) * 2005-04-04 2010-09-28 Current Technologies, Llc Power line communication device and method
JP2006295479A (en) * 2005-04-08 2006-10-26 Matsushita Electric Ind Co Ltd Power line communications apparatus and power line communication method
DE102005016716B4 (en) * 2005-04-11 2012-05-03 Deutsches Zentrum für Luft- und Raumfahrt e.V. Method for suppression of spectral sidelobes in transmission systems based on OFDM
US7564775B2 (en) * 2005-04-29 2009-07-21 Qualcomm, Incorporated Timing control in orthogonal frequency division multiplex systems based on effective signal-to-noise ratio
JP4731991B2 (en) * 2005-05-16 2011-07-27 パナソニック株式会社 Multi-carrier communication apparatus and multi-carrier communication method
US8406239B2 (en) 2005-10-03 2013-03-26 Broadcom Corporation Multi-wideband communications over multiple mediums
US8213895B2 (en) 2005-10-03 2012-07-03 Broadcom Europe Limited Multi-wideband communications over multiple mediums within a network
US7808985B2 (en) 2006-11-21 2010-10-05 Gigle Networks Sl Network repeater
EP1770870B1 (en) 2005-10-03 2019-04-03 Avago Technologies International Sales Pte. Limited Powerline communication device and method
CN101228723B (en) * 2005-10-05 2013-03-20 松下电器产业株式会社 Communication apparatus and coexistence method for enabling coexistence of communication systems
US20090207790A1 (en) * 2005-10-27 2009-08-20 Qualcomm Incorporated Method and apparatus for settingtuneawaystatus in an open state in wireless communication system
US7440412B2 (en) * 2006-03-13 2008-10-21 Tzero Technologies, Inc. Link quality prediction
US7860146B2 (en) 2006-07-06 2010-12-28 Gigle Networks, Inc. Adaptative multi-carrier code division multiple access
JP4878626B2 (en) * 2006-07-10 2012-02-15 国立大学法人大阪大学 Transmission method, transmission system, and receiver
US8213582B2 (en) 2008-03-14 2012-07-03 Broadcom Europe Limited Coupling signal processing circuitry with a wireline communications medium
US9705562B2 (en) 2006-07-25 2017-07-11 Broadcom Europe Limited Dual transformer communication interface
US8885814B2 (en) 2006-07-25 2014-11-11 Broadcom Europe Limited Feedback impedance control for driving a signal
US8730924B2 (en) * 2006-11-02 2014-05-20 Telefonaktiebolaget L M Ericsson (Publ) Method and arrangement in a telecommunication system
GB2449857A (en) * 2007-06-04 2008-12-10 British Broadcasting Corp Multi-carrier transmission system in which data is redundantly encoded using two different PAM schemes
CN101933229A (en) * 2008-01-25 2010-12-29 Nxp股份有限公司 The improvement of radio receiver
JP5088957B2 (en) * 2008-02-18 2012-12-05 パナソニック株式会社 Power line communication apparatus, power line communication system, and registration processing method
US7602220B1 (en) 2008-06-24 2009-10-13 Gigle Semiconductor, Ltd. Resistor-input transconductor including common-mode compensation
US7795973B2 (en) 2008-10-13 2010-09-14 Gigle Networks Ltd. Programmable gain amplifier
US7956689B2 (en) 2008-10-13 2011-06-07 Broadcom Corporation Programmable gain amplifier and transconductance compensation system
US20100094995A1 (en) * 2008-10-14 2010-04-15 Entropic Communications, Inc. Silent Probes in a Communication Network
US8320566B2 (en) * 2008-10-16 2012-11-27 Entropic Communications, Inc. Method and apparatus for performing constellation scrambling in a multimedia home network
JP2009135940A (en) * 2009-01-07 2009-06-18 Victor Co Of Japan Ltd Ofdm signal, and nak signal
JP5104829B2 (en) * 2009-08-26 2012-12-19 株式会社Ｊｖｃケンウッド OFDM signal receiving apparatus and OFDM signal receiving method
JP5338749B2 (en) * 2010-06-03 2013-11-13 富士通株式会社 Wireless communication apparatus and bandwidth allocation method
RU2462751C2 (en) * 2010-12-13 2012-09-27 Российская Федерация, от имени которой выступает Министерство обороны Российской Федерации Multifunctional system for reception, demodulation and processing of communication line signals
FR2970828A1 (en) * 2011-01-25 2012-07-27 France Telecom WEIGHTING FILTER, METHODS AND DEVICES FOR TRANSMITTING AND RECEIVING AN ANALOGUE SIGNAL AND CORRESPONDING COMPUTER PROGRAM
MD536Z (en) * 2011-12-12 2013-02-28 ИНСТИТУТ ЭЛЕКТРОННОЙ ИНЖЕНЕРИИ И НАНОТЕХНОЛОГИЙ "D. Ghitu" АНМ Method for signal transmission through the direct current line
MD543Z (en) * 2012-01-13 2013-03-31 ИНСТИТУТ ЭЛЕКТРОННОЙ ИНЖЕНЕРИИ И НАНОТЕХНОЛОГИЙ "D. Ghitu" АНМ Method for transmission of two signals through the three-wire direct current line
JP2014064100A (en) * 2012-09-20 2014-04-10 Aisin Seiki Co Ltd Power line communication transceiver and power line communication method
US9059776B1 (en) 2012-11-30 2015-06-16 Marvell International Ltd. Integrated power line communication architectures for power entry modules
MD692Z (en) * 2013-02-13 2014-05-31 ИНСТИТУТ ЭЛЕКТРОННОЙ ИНЖЕНЕРИИ И НАНОТЕХНОЛОГИЙ "D. Ghitu" АНМ Method for transmitting measuring signals through the three-wire direct-current line
US20140254649A1 (en) * 2013-03-07 2014-09-11 Qualcomm Incorporated Rate adaptation algorithm using raw bit error rate
JP6115416B2 (en) * 2013-09-06 2017-04-19 富士通株式会社 Optical transmitter, optical receiver, optical transmission system, optical transmission method, optical reception method, and optical transmission method
US9654392B2 (en) * 2013-12-26 2017-05-16 Red Hat, Inc. MAC address prefixes used on virtual machine hosts
CN105450257A (en) * 2014-08-22 2016-03-30 中车大连电力牵引研发中心有限公司 Carrier communication system and data-processing method
US10484513B2 (en) 2015-07-17 2019-11-19 Nsgdatacom, Inc. System, method, and computer program product for connecting or coupling audio communications systems over a software defined wide area network
DE102016218891A1 (en) * 2016-09-29 2018-03-29 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Antenna measuring station
FR3126573A1 (en) * 2021-08-26 2023-03-03 Sagemcom Energy & Telecom Sas TRANSMISSION METHOD AND NODE DEVICE IMPLEMENTING SUCH METHOD
CN114665923A (en) * 2022-03-09 2022-06-24 深圳市国电科技通信有限公司 Data processing method and device for carrier communication and processor
CN116755319B (en) * 2023-08-18 2023-11-21 青岛鼎信通讯股份有限公司 Electric energy meter clock system, control method and device, computer equipment and medium

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355114A (en) * 1991-05-10 1994-10-11 Echelon Corporation Reconstruction of signals using redundant channels
US5285474A (en) * 1992-06-12 1994-02-08 The Board Of Trustees Of The Leland Stanford, Junior University Method for equalizing a multicarrier signal in a multicarrier communication system
WO1995034149A1 (en) * 1994-06-02 1995-12-14 Amati Communications Corporation Method and apparatus for coordinating multi-point-to-point communications in a multi-tone data transmission system
GB9510127D0 (en) * 1995-05-20 1995-08-02 West End System Corp CATV Data transmission system
WO1998010546A2 (en) * 1996-09-02 1998-03-12 Telia Ab (Publ) Improvements in, or relating to, multi-carrier transmission systems
DE19716011A1 (en) * 1997-04-17 1998-10-22 Abb Research Ltd Method and device for transmitting information via power supply lines
KR100227794B1 (en) * 1997-07-16 1999-11-01 정선종 Multipoint communication system and method of generating a virtual path using a method of generating of the multicasting path distribution
DK0924911T3 (en) * 1997-12-15 2001-07-02 Abb Patent Gmbh Multi-carrier method for transmission via energy distribution network
US6144695A (en) * 1997-12-23 2000-11-07 At&T Corp. Method and apparatus for reducing near-end crosstalk (NEXT) in discrete multi-tone modulator/demodulators
KR100250454B1 (en) * 1997-12-23 2000-04-01 정선종 Multi-point communication system and multicast path error control
ITMI981699A1 (en) * 1998-07-23 2000-01-23 Alsthom Cge Alcatel METHOD AND DEVICE FOR BIDIRECTIONAL DATA EXCHANGE LONG LOW AND MEDIUM VOLTAGE ELECTRICAL LINES
US6321075B1 (en) * 1998-07-30 2001-11-20 Qualcomm Incorporated Hardware-efficient transceiver with delta-sigma digital-to-analog converter
DE19837426C2 (en) * 1998-08-18 2001-12-06 Fraunhofer Ges Forschung Method and device for transmitting information symbols by means of a plurality of carriers and method and device for receiving information symbols
US6553063B1 (en) * 1998-10-30 2003-04-22 Broadcom Corporation Constellation-multiplexed transmitter and receiver
GB9827601D0 (en) * 1998-12-15 1999-02-10 Northern Telecom Ltd A power line communications system and method of operation thereof
US6985548B1 (en) * 1999-02-03 2006-01-10 Conexant Systems, Inc. System and method for timing recovery in a discrete multi-tone system
US7203718B1 (en) * 1999-10-29 2007-04-10 Pentomics, Inc. Apparatus and method for angle rotation
US6771284B1 (en) * 2000-03-01 2004-08-03 Gateway, Inc. System and method of providing a navigational aide
US6396392B1 (en) * 2000-05-23 2002-05-28 Wire21, Inc. High frequency network communications over various lines
US6671284B1 (en) * 2000-08-04 2003-12-30 Intellon Corporation Frame control for efficient media access

Also Published As

Publication number Publication date
BRPI0116692B1 (en) 2016-06-28
EA005957B1 (en) 2005-08-25
CN1489833A (en) 2004-04-14
CA2453674C (en) 2010-06-22
KR100722810B1 (en) 2007-05-30
EP1351408B1 (en) 2007-08-08
IL156440A (en) 2009-09-22
CY1107070T1 (en) 2012-10-24
CN100531000C (en) 2009-08-19
AU2002216122B2 (en) 2007-06-07
US7391714B2 (en) 2008-06-24
JP4263483B2 (en) 2009-05-13
IL156440A0 (en) 2004-01-04
JP2004523152A (en) 2004-07-29
BR0116692A (en) 2005-01-18
US20040037214A1 (en) 2004-02-26
ES2184587B1 (en) 2004-08-01
WO2002051024A1 (en) 2002-06-27
DE60129845T2 (en) 2008-04-24
ES2291272T3 (en) 2008-03-01
AU1612202A (en) 2002-07-01
HK1059512A1 (en) 2004-07-02
PT1351408E (en) 2007-11-19
ES2184587A1 (en) 2003-04-01
DE60129845D1 (en) 2007-09-20
MXPA03005314A (en) 2003-09-25
EP1351408A1 (en) 2003-10-08
EA200300668A1 (en) 2004-02-26
ATE369666T1 (en) 2007-08-15
DK1351408T3 (en) 2007-12-10
KR20040018320A (en) 2004-03-03

Similar Documents

Publication Publication Date Title
CA2453674A1 (en) Point to multipoint system and process for the transmission over the electricity network of digital data
US10932155B2 (en) Apparatus for transmitting and receiving data to provide high-speed data communication and method thereof
US6628735B1 (en) Correction of a sampling frequency offset in an orthogonal frequency division multiplexing system
CA2562395C (en) System and method for data communication over power lines
KR100768052B1 (en) Estimation of two propagation channels in ofdm
CN1965518B (en) Apparatus and method for channel estimation in an orthogonal frequency division multiplexing cellular communication system using multiple transmit antennas
US20050207334A1 (en) OFDM communication channel
GB2303032A (en) Adaptive bit swapping between channels of a discrete multitone system
GB2332603A (en) Multi-directional OFDM communication systems
EP2467987A2 (en) Concatenated repetition code with convolutional code
EP1062760B1 (en) Improvements in vdsl
GB2332602A (en) Multi-directional communication systems
CN109688081B (en) Signal frequency offset estimation method based on TETRA II standard and wireless communication system
Amasa Inter Carrier Interference Cancellation in OFDM Systems
WO2009135886A1 (en) Method and apparatus for filtered multitone modulation using circular convolution
CN117061301A (en) Building construction site electricity-network communication method, medium and system
WO2004075433A1 (en) Power line carrier communication device and power line carrier communication method
EP2926514A1 (en) A new interpolation algorithm for pilot-based channel estimation in ofdm systems
JP2003218824A (en) Apparatus and method for demodulating for ofdm

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20181218