CA2411457A1 - Transmission system, transmission method, transmission apparatus, and electronic recording medium having recorded therein transmission program - Google Patents
Transmission system, transmission method, transmission apparatus, and electronic recording medium having recorded therein transmission program Download PDFInfo
- Publication number
- CA2411457A1 CA2411457A1 CA002411457A CA2411457A CA2411457A1 CA 2411457 A1 CA2411457 A1 CA 2411457A1 CA 002411457 A CA002411457 A CA 002411457A CA 2411457 A CA2411457 A CA 2411457A CA 2411457 A1 CA2411457 A1 CA 2411457A1
- Authority
- CA
- Canada
- Prior art keywords
- transmission
- radio link
- carriers
- recorded
- recording medium
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
- H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
- H04L25/0236—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols using estimation of the other symbols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0212—Channel estimation of impulse response
- H04L25/0216—Channel estimation of impulse response with estimation of channel length
-
- 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
- H04L5/02—Channels characterised by the type of signal
- H04L5/023—Multiplexing of multicarrier modulation signals
- H04L5/026—Multiplexing of multicarrier modulation signals using code division
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
Abstract
The transmission system of the present invention is designed to transmit a plurality of signals between the transmitter and the receiver using a plurality of carriers and comprises a radio link characteristics estimator 4 configured to estimate the characteristics of a radio link between the transmitter and the receiver and a carrier quantity determination unit 3 configured to determine the number of carriers according to the result of the estimate by the radio link characteristics estimator 4. The radio link characteristics estimator 4 estimates the characteristics according to an interval in delay time of multipath signals and the number of the multipath signals. The carrier quantity determination unit 3 determines fewer carriers when multipath interference is small, and determines more carriers when the multipath interference is great.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-345171 | 2001-11-09 | ||
JP2001345171A JP3934402B2 (en) | 2001-11-09 | 2001-11-09 | Transmission system, transmission method, transmission apparatus, and electronic recording medium recording transmission program |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2411457A1 true CA2411457A1 (en) | 2003-05-09 |
CA2411457C CA2411457C (en) | 2009-01-27 |
Family
ID=19158560
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2411457 Expired - Fee Related CA2411457C (en) | 2001-11-09 | 2002-11-08 | Transmission system, transmission method, transmission apparatus, and electronic recording medium having recorded therein transmission program |
Country Status (8)
Country | Link |
---|---|
US (1) | US7154955B2 (en) |
EP (1) | EP1311074A1 (en) |
JP (1) | JP3934402B2 (en) |
KR (1) | KR100516472B1 (en) |
CN (1) | CN1238985C (en) |
AU (1) | AU2002357578B2 (en) |
CA (1) | CA2411457C (en) |
SG (1) | SG114581A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7317756B2 (en) | 2001-12-06 | 2008-01-08 | Pulse-Link, Inc. | Ultra-wideband communication apparatus and methods |
US7349439B2 (en) * | 2001-12-06 | 2008-03-25 | Pulse-Link, Inc. | Ultra-wideband communication systems and methods |
US8045935B2 (en) | 2001-12-06 | 2011-10-25 | Pulse-Link, Inc. | High data rate transmitter and receiver |
JP2005012429A (en) * | 2003-06-18 | 2005-01-13 | Matsushita Electric Ind Co Ltd | Mobile communication terminal and handover control method |
US20060013182A1 (en) * | 2004-07-19 | 2006-01-19 | Telefonaktiebolaget Lm Ericsson | Selective multicarrier CDMA network |
US8018930B2 (en) * | 2004-10-01 | 2011-09-13 | Qualcomm Incorporated | Apparatus and method for receiving packet data on a subset of carrier frequencies in a wireless communication system |
US8130781B2 (en) | 2005-02-28 | 2012-03-06 | Intellectual Ventures I Llc | Method and apparatus for providing dynamic selection of carriers |
WO2007023530A1 (en) | 2005-08-23 | 2007-03-01 | Mitsubishi Denki Kabushiki Kaisha | Wireless communication system and communication apparatus |
CN1929360B (en) * | 2005-09-07 | 2010-07-07 | 都科摩(北京)通信技术研究中心有限公司 | Alternating frequency time-sharing duplex communication method |
JP4672557B2 (en) * | 2006-01-11 | 2011-04-20 | 日本電信電話株式会社 | Wireless communication apparatus and wireless communication system |
JP2008124942A (en) * | 2006-11-15 | 2008-05-29 | Nec Corp | Wireless communications system, wireless communications device and valid path detection method therefor |
EP2640026A1 (en) * | 2012-03-16 | 2013-09-18 | Nec Corporation | Method for estimating the frequency bandwidth of a communication channel |
US9641371B2 (en) | 2014-12-31 | 2017-05-02 | Motorola Solutions, Inc | Methods and systems for dynamic single-frequency-network-multicast symbol synchronization |
US10045346B1 (en) * | 2016-08-02 | 2018-08-07 | Sprint Spectrum L.P. | Assigning a low-GDV carrier to a high-speed UE |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5619524A (en) * | 1994-10-04 | 1997-04-08 | Motorola, Inc. | Method and apparatus for coherent communication reception in a spread-spectrum communication system |
SG77607A1 (en) * | 1997-08-26 | 2001-01-16 | Univ Singapore | A multi-user code division multiple access receiver |
US6157820A (en) * | 1998-06-12 | 2000-12-05 | Ericsson Inc. | Pilot strength measurement and multipath delay searcher for CDMA receiver |
US6810070B1 (en) * | 2000-01-12 | 2004-10-26 | Ericsson Inc. | Selective multi-carrier direct sequence spread spectrum communication systems and methods |
-
2000
- 2000-12-27 CN CNB021464766A patent/CN1238985C/en not_active Expired - Fee Related
-
2001
- 2001-11-09 JP JP2001345171A patent/JP3934402B2/en not_active Expired - Fee Related
-
2002
- 2002-11-06 EP EP20020024916 patent/EP1311074A1/en not_active Withdrawn
- 2002-11-07 KR KR10-2002-0068725A patent/KR100516472B1/en not_active IP Right Cessation
- 2002-11-07 SG SG200206737A patent/SG114581A1/en unknown
- 2002-11-08 CA CA 2411457 patent/CA2411457C/en not_active Expired - Fee Related
- 2002-11-08 AU AU2002357578A patent/AU2002357578B2/en not_active Ceased
- 2002-11-08 US US10/290,210 patent/US7154955B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20030092404A1 (en) | 2003-05-15 |
EP1311074A1 (en) | 2003-05-14 |
SG114581A1 (en) | 2005-09-28 |
US7154955B2 (en) | 2006-12-26 |
JP2003152597A (en) | 2003-05-23 |
JP3934402B2 (en) | 2007-06-20 |
CA2411457C (en) | 2009-01-27 |
CN1417966A (en) | 2003-05-14 |
KR100516472B1 (en) | 2005-09-22 |
CN1238985C (en) | 2006-01-25 |
KR20030038486A (en) | 2003-05-16 |
AU2002357578B2 (en) | 2008-12-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20131108 |
|
MKLA | Lapsed |
Effective date: 20131108 |