WO2000024121A1 - Data transfer in fixed-site radio transceiver station with power supply current modulation - Google Patents
Data transfer in fixed-site radio transceiver station with power supply current modulation Download PDFInfo
- Publication number
- WO2000024121A1 WO2000024121A1 PCT/SE1999/001821 SE9901821W WO0024121A1 WO 2000024121 A1 WO2000024121 A1 WO 2000024121A1 SE 9901821 W SE9901821 W SE 9901821W WO 0024121 A1 WO0024121 A1 WO 0024121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power supply
- supply current
- amplifier
- information
- tower
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/004—Control by varying the supply voltage
Definitions
- the invention relates generally to fixed-site radio transceiver stations and, more particularly, to data transfer in fixed-site radio transceiver stations.
- the radio antenna and an associated amplifier are typically mounted high atop a tower structure, and connected to the remainder of the base transceiver station via a radio frequency (RF) feeder cable.
- the RF feeder cable is also conventionally used to supply DC power supply current to the tower mounted amplifier (TMA).
- FIGURE 1 is a block diagram of one example of the above-described conventional base transceiver station, for example a base transceiver station used in a conventional GSM (Global System for Mobile communications) wireless communications network.
- the example of FIGURE 1 shows the tower mounted amplifier 11 of the base station connected to the remainder 13 of the base station by GSM (Global System for Mobile communications)
- the remainder portion 13 includes a TMA power supply 17 for providing DC power supply current for use by the tower mounted amplifier TMA.
- the remainder portion 13 also includes a so-called "bias Tee” module 19 connected to the TMA power supply 17 and also connected to an RF signalling path 12 which is in turn coupled to a radio transceiver (XCVR) of the base station.
- XCVR radio transceiver
- the bias Tee module 19 is a conventional apparatus which combines both the RF signalling from RF signalling path 12 and the DC power supply current from the TMA power supply 17 in the RF feeder cable 15.
- the RF feeder cable 15 provides RF signalling and DC power supply current to the tower mounted amplifier TMA.
- the bias Tee module 19 of the remainder portion 13 also separates RF signalling received via RF feeder cable 15 from the power supply current in the RF feeder cable 15.
- the bias Tee module described above is a conventional apparatus well known to workers in the art.
- the tower mounted amplifier 1 1 also includes a bias Tee module 19 for separating the RF signalling from the DC power supply current in the RF feeder cable
- the bias Tee module 19 provides the DC power supply current to the local power supply 16 of the tower mounted amplifier TMA.
- the local power supply 16 provides the tower mounted amplifier TMA with the necessary DC power supply current.
- the tower mounted amplifier TMA is typically designed so that, should a fault occur in the TMA, it will typically be detectable at the remainder portion 13 by detecting changes in the power supply current drawn by the tower mounted amplifier 11 from the TMA power supply 17 of the remainder portion 13. Such changes in current are conventionally detected by a data processor 20 which receives a digital input from an A D converter 21 whose analog input is coupled to the DC power supply current output 24 of the TMA power supply 17.
- the tower mounted amplifier TMA includes an amplifier AMP that is coupled to the RF signalling path 14 and to a tower mounted antenna for appropriately amplifying RF signals that are received (Rx) by the tower mounted antenna.
- RF signals to be transmitted (Tx) by the antenna are typically filtered and applied to a booster before antenna transmission. Such filter and booster functions can be built into the conventional amplifier unit AMP.
- FIGURE 1 has associated therewith TMA parameter data which can represent, for example, information associated with the TMA such as product information, serial numbers, filter frequency information, amplifier gain information, alarm limits, etc.
- TMA parameter data can represent, for example, information associated with the TMA such as product information, serial numbers, filter frequency information, amplifier gain information, alarm limits, etc.
- the TMA parameter data is typically input manually to the remainder portion 13 (e.g., to the data processor 20).
- the parameter data associated with the added/replacement TMA must disadvantageously be manually input to the remainder portion 13 of the fixed-site transceiver. This is both costly and time-consuming. It is desirable in view of the foregoing to avoid the delay and expense of manually inputting TMA parameter data to the remainder portion 13 of the base transceiver station whenever a new or replacement tower mounted amplifier TMA is installed.
- a tower mounted amplifier can automatically signal the parameter data of the tower mounted amplifier to the remainder portion of the base transceiver station using a power supply current path coupled between the tower mounted amplifier and the remainder portion.
- FIGURE 1 illustrates pertinent portions of a conventional base transceiver station for use in a wireless communication system.
- FIGURE 2 illustrates pertinent portions of an example base transceiver station according to the present invention.
- FIGURE 3 illustrates a plurality of nominal power supply current levels used to transmit on the RF feeder cable of FIGURE 2 parameter data associated with the tower mounted amplifier of FIGURE 2.
- FIGURE 4 illustrates how the current levels of FIGURE 3 can be used to transmit multiple level coded data on the RF feeder of FIGURE 2.
- FIGURE 5 is similar to FIGURE 2, including a detailed example of the power supply current modulator of FIGURE 2.
- FIGURE 6 illustrates in flow diagram format exemplary operations which can be performed by the power supply current modulators of FIGURES 2 and 5.
- FIGURE 2 illustrates diagrammatically pertinent portions of an example base transceiver station according to the invention.
- the base transceiver station of FIGURE 2 which could be used in, for example, a GSM network, includes a tower mounted amplifier (TMA) 23 and a remainder portion 25.
- the tower mounted amplifier portion 23 of FIGURE 2 includes a power supply current modulator 22 coupled between the bias Tee module 19 and the local power supply 16.
- the modulator 22 uses the TMA parameter data to modulate the power supply current drawn from the TMA power supply 17 (through- RF feeder 15) by the tower mounted amplifier portion 23.
- the power supply current drawn from the TMA power supply 17 is monitored by an A/D converter 21 coupled to the TMA power supply output 24, and the digital output of the A/D converter is input to a data processor 27 coupled to the A/D converter.
- the data processor 27 interprets the digital data received from the A/D converter to thereby recover the TMA parameter data as modulated by modulator 22 onto the TMA power supply current drawn from the TMA power supply 17.
- the A/D converter 21 and data processor 27 thus detect and decode the TMA parameter data as modulated onto the TMA power supply current.
- the power supply current modulator 22 of FIGURE 2 causes the power supply current drawn from the TMA power supply 17 to vary among a plurality of distinct current levels in response to the TMA parameter data input to the modulator 22.
- the various current levels are used to represent the TMA parameter data.
- adjacent ones of current levels seen by the A/D converter 21 should preferably be separated from one another by a known minimum amount. The smallest possible separation between two current levels is dependent on the accuracy specifications of (1) the A/D converter 21 and (2) conventional signal conditioning circuits (not shown) included in the current path 28 coupling the TMA power supply 17 to the A/D converter 21.
- the current level seen by the A/D converter can be expected to be within a ⁇ 7 mA uncertainty range of the actual current level output by the TMA power supply 17.
- 8 distinct current levels are to be used to transfer the TMA parameter data.
- a suitable separation between adjacent current levels can then be calculated by subtracting the lowest of the current levels from the highest of the current levels, and dividing the result by 8.
- each current level used in the TMA data transfer should be preferably centered in a current level decision interval which extends at least 3 steps of the A/D converter above and at least 3 steps of the A/D converter below that current level. In this example, one additional step is added between adjacent intervals to ensure separation of the adjacent intervals.
- FIGURE 3 illustrates the above-described example of current levels for use in transferring the TMA parameter data.
- each current level 31 is centered in an interval which extends three steps above and three steps below the current level, and each interval is separated from each adjacent interval by a one step gap. Accordingly, each current level is separated from the next adjacent current level by seven steps, which corresponds in this example to 24.5 mA (7 steps x 3.5 mA/step).
- FIGURE 4 illustrates an example current waveform representing the power supply current i TMA drawn from (output by) the TMA power supply 17 in response to operation of the power supply current modulator 22 of FIGURE 2.
- FIGURE 4 illustrates eight current levels, thus providing eight possible signalling symbols.
- i n represents the nominal TMA power supply current drawn by the tower mounted amplifier portion 23 under normal conventional operating conditions, and the remaining current levels are defined by the aforementioned 24.5 mA separations.
- 171.5 mA represents a start symbol
- the nominal current level i n represents a stop (or idle) symbol.
- eight symbol times (designated 0 - 7) exist between the start and stop symbols, so a symbol octet including eight separate symbols can be transferred during the time between the start and stop symbols.
- the minimum possible length of the symbol times is determined by the speed of A/D converter 21 and the limits imposed by the RF feeder cable 15 and path 28.
- multiple level coding can be utilized in conjunction with the modulation of TMA parameter data. For example, using the eight current levels of FIGURE 4, each current level can represent a three bit symbol as shown in FIGURE 4.
- the symbol transmitted during symbol time 0 corresponds to 110
- the symbol transmitted during symbol time 1 corresponds to 101
- the symbol transmitted during symbol time 2 corresponds to 1 10
- the symbol transmitted during symbol time 3 corresponds to 011
- the symbol transmitted during symbol time 4 corresponds to 111
- the symbol transmitted during symbol time 5 corresponds to 000
- the symbol transmitted during symbol 6 corresponds to 001
- the symbol transmitted during symbol time 7 corresponds to 011.
- the received pattern of bits in this example will be 1101 01 11 0011 11100000 101 1.
- data processor 27 can be, for example, a digital signal processor, a microprocessor, or another suitable data processing apparatus.
- FIGURE 5 illustrates diagrammatically an exemplary radio base transceiver station according to the invention.
- FIGURE 5 is similar to FIGURE 2, and includes a detailed example of the power supply current modulator 22 of FIGURE 2.
- the exemplary power supply current modulator of FIGURE 5 includes a clock 51 having a frequency that corresponds to the symbol rate of the data transfer illustrated in FIGURE 4.
- the clock 51 is connected to a clock input of a counter 53.
- the counter 53 is connected to a clock input of a counter 53.
- the 53 includes parallel outputs which are connected to address inputs A0- A7 of a memory 55.
- the memory 55 can be, for example, a non-volatile memory circuit.
- the memory 55 has data outputs D0-D2 which are connected to respective data inputs of a D/A converter 58.
- the three data outputs D0-D2 correspond to the eight current levels of the FIGURE 4 example.
- the analog output Aout of the D/A converter is connected to a control input 52 of a transistor circuit 59 that can sink desired amounts of current and thereby vary the current drawn from the TMA power supply 17.
- the parameter data for the tower mounted amplifier TMA is stored in the memory 55, and this stored parameter data is addressed by the counter circuit 53.
- the counter 53 steps through the addresses where the
- TMA parameter data is stored in the memory 55.
- the three-bit output of memory 55 can be converted by the D/A converter 58 into eight distinct control signals (e.g., control voltages) which cause the transistor circuit 59 to sink eight distinct amounts of current, thus resulting in eight distinct power supply current levels (see FIGURE 4) drawn from the TMA power supply 17 and seen by the A/D converter 21.
- control signals e.g., control voltages
- FIGURE 4 eight distinct power supply current levels
- a transistor circuit is shown at 59 as a controllable current sink, other suitable controllable current sinks can be used as well.
- the clock circuit 51 causes the counter circuit 53 to count up to the number of addresses needed for the complete message. For each memory location addressed by the parallel outputs of the counter circuit 53, the associated data bits are output to the
- the D/A converter 58 which converts the bit pattern to a control signal for controlling the transistor circuit 59.
- the stop (or idle) symbol 000 of FIGURE 4 will, in this example, cause the transistor circuit 59 to assume a high impedance state so that the normal conventional operating current i n is drawn from TMA power supply 17.
- the counter 53 is reset at power on, and is also advantageously reset after the stop symbol is output.
- the counter is easily programmable to count through a sequence of addresses corresponding to the symbol sequence of FIGURE 4, namely from stop symbol to stop symbol.
- the counter can be programmed to count through any desired sequence of addresses to transmit any desired number of symbol octets (and associated start and stop symbols) like the one shown in FIGURE 4.
- the reset count preferably selects the stop symbol so no current is sunk at 59 while the counter is reset.
- the clock 51 can be started at power on (or at system restart) and halted after the stop symbol is output.
- the data processor 27 can process the digital output of the A/D converter 21 in the following exemplary manner. Referring also to FIGURE 4, before the start symbol ( 111 ) is detected, the data processor 27 can perform, for example, a five times oversampling of the digital output of the A/D converter 21. Once a change from the idle symbol to the start symbol is detected, the data processor sets sampling points for the remaining symbols in the data transfer at the middle of each of the successive symbol periods 0-7 illustrated in FIGURE 4. The digital output from the A/D converter 21 (in this example a three-bit output) is read by the data processor 27 at each sampling point. When the data processor 27 detects the stop symbol (after symbol period 7 in this example), the five times oversampling can start again. After the data processor 27 has received the stop symbol, the data processor 27 can then assemble the message, for example, in the manner described above with respect to FIGURE 4.
- the above-described transfer of TMA parameter data from the tower mounted portion to the remainder portion can be executed, for example, whenever the tower mounted amplifier TMA is powered up or restarted.
- FIGURE 6 illustrates exemplary operations performed by the power supply current modulator example of FIGURE 5.
- the counter 53 applies the initial address (e.g., the address of the start symbol for the first symbol octet) to the memory 55.
- the memory 55 outputs the addressed data to the D/A converter 58.
- the D/A converter converts the digital data to an analog control signal for controlling the transistor circuit 59.
- the transistor circuit 59 sinks an amount of current corresponding to the control signal received from the D/A converter (and thus also corresponding to the digital data output from memory 55). If it is determined at 69 that there is more data to be transmitted, then the output of counter 53 is incremented to the next address at 68, and the procedure is repeated until it is determined at 69 that all data (including the final idle symbol) has been transmitted.
- controllable current sink can also be readily controlled in the manner described above using a suitably programmed data processing apparatus to input digital data to the D/A converter 58.
- the invention advantageously permits automatic transfer of TMA parameter data using power supply current modulation, and also enhances the data throughput by using multiple level coding.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9914662-2A BR9914662A (en) | 1998-10-21 | 1999-10-08 | Tower-mountable radio frequency amplifier apparatus, fixed-location radio transceiver station, and method of operation of a tower-mounted radio frequency amplifier apparatus |
EP99970799A EP1123579B1 (en) | 1998-10-21 | 1999-10-08 | Data transfer in fixed-site radio transceiver station with power supply current modulation |
DE69922826T DE69922826T2 (en) | 1998-10-21 | 1999-10-08 | DATA TRANSMISSION FOR A RADIO IN A FIXED STATION WITH SUPPLY CURRENT MODULATION |
AU14234/00A AU756750B2 (en) | 1998-10-21 | 1999-10-08 | Data transfer in fixed-site radio transceiver station with power supply current modulation |
JP2000577766A JP4557427B2 (en) | 1998-10-21 | 1999-10-08 | Data transfer in fixed-position radio transceiver stations with modulation of feed current |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/176,667 US6266545B1 (en) | 1998-10-21 | 1998-10-21 | Transferring data in a fixed-site radio transceiver station by modulating power supply current |
US09/176,667 | 1998-10-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000024121A1 true WO2000024121A1 (en) | 2000-04-27 |
Family
ID=22645332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1999/001821 WO2000024121A1 (en) | 1998-10-21 | 1999-10-08 | Data transfer in fixed-site radio transceiver station with power supply current modulation |
Country Status (8)
Country | Link |
---|---|
US (1) | US6266545B1 (en) |
EP (1) | EP1123579B1 (en) |
JP (1) | JP4557427B2 (en) |
CN (1) | CN1183698C (en) |
AU (1) | AU756750B2 (en) |
BR (1) | BR9914662A (en) |
DE (1) | DE69922826T2 (en) |
WO (1) | WO2000024121A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2062330A1 (en) * | 2006-09-15 | 2009-05-27 | Powerwave Technologies Sweden AB | Communication solution for antennas |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6812905B2 (en) * | 1999-04-26 | 2004-11-02 | Andrew Corporation | Integrated active antenna for multi-carrier applications |
CN1107358C (en) * | 2000-02-24 | 2003-04-30 | 信息产业部电信科学技术研究院 | Distributed intelligent antenna system |
US20030172560A1 (en) * | 2000-05-05 | 2003-09-18 | Sanjurjo Ana Dominguez | Ear tag adaptable device for taking samples to identify cattle by means of dna |
US6795510B2 (en) * | 2002-04-12 | 2004-09-21 | Thomson Licensing S.A. | Apparatus and method for symbol timing recovery |
US7053763B2 (en) * | 2002-05-24 | 2006-05-30 | Cingular Wireless Ii, Llc | System and method for alarm monitoring |
KR100653440B1 (en) * | 2002-08-03 | 2006-12-01 | 주식회사 케이엠더블유 | Bias-t apparatus and center conductor of the same |
US6983174B2 (en) * | 2002-09-18 | 2006-01-03 | Andrew Corporation | Distributed active transmit and/or receive antenna |
US7280848B2 (en) * | 2002-09-30 | 2007-10-09 | Andrew Corporation | Active array antenna and system for beamforming |
FR2854288B1 (en) * | 2003-04-23 | 2005-05-27 | Commissariat Energie Atomique | RF TRANSMITTING-RECEIVING DEVICE |
US7898406B2 (en) * | 2003-10-16 | 2011-03-01 | Microsemi Corp. - Analoged Mixed Signal Group Ltd | Powered device with priority indicator |
US7729726B2 (en) * | 2004-03-26 | 2010-06-01 | Nortel Networks Limited | Feeder cable reduction |
US7181243B1 (en) * | 2004-06-15 | 2007-02-20 | Nortel Networks Limited | Frequency translation |
US8135086B1 (en) | 2004-08-09 | 2012-03-13 | Rockstar Bidco, LP | Cable reduction |
US8452333B2 (en) * | 2005-12-12 | 2013-05-28 | Apple Inc. | Feeder cable reduction |
CN100517995C (en) * | 2006-03-08 | 2009-07-22 | 鸿富锦精密工业(深圳)有限公司 | Wireless receiving and transmission system |
TWI305979B (en) * | 2006-03-24 | 2009-02-01 | Hon Hai Prec Ind Co Ltd | Wireless transceiving system |
CN101114853B (en) * | 2006-07-29 | 2010-12-08 | 华为技术有限公司 | Tower amplifier gain adjusting method and system and tower amplifier |
JP2008177667A (en) * | 2007-01-16 | 2008-07-31 | Toshiba Corp | Portable information terminal device |
CN101043239B (en) * | 2007-04-28 | 2010-09-08 | 华为技术有限公司 | System for biasing T-shaped head and controlling antenna |
US8331851B2 (en) * | 2008-07-28 | 2012-12-11 | Verizon Patent And Licensing Inc. | Very small aperture terminal (VSAT) site diagnostics |
CN101789762B (en) * | 2010-01-15 | 2012-05-30 | 电子科技大学中山学院 | Configurable current cell in tower top amplifier |
CN105357755A (en) * | 2013-01-25 | 2016-02-24 | 华为技术有限公司 | Positioning method and device of connection relations between base station antenna feeder ports and antenna ports |
US9193474B2 (en) * | 2013-06-06 | 2015-11-24 | Hamilton Sundstrand Corporation | Signal transmission via current modulation of power input |
CN113556143B (en) * | 2020-04-20 | 2022-08-12 | 炬芯科技股份有限公司 | Communication method, communication circuit and communication system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0589574A1 (en) * | 1992-09-23 | 1994-03-30 | Nokia Mobile Phones Ltd. | An amplifier control system |
EP0599659A1 (en) * | 1992-11-26 | 1994-06-01 | Nec Corporation | Booster for use in combination with radio apparatus |
EP0708527A1 (en) * | 1994-10-21 | 1996-04-24 | Nec Corporation | Method and device for controlling output power of a power amplifier |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3988676A (en) | 1971-05-17 | 1976-10-26 | Milgo Electronic Corporation | Coding and decoding system with multi-level format |
US4086587A (en) | 1977-02-28 | 1978-04-25 | Gte Automatic Electric Laboratories Incorporated | Apparatus and method for generating a high-accuracy 7-level correlative signal |
US4292633A (en) * | 1978-11-24 | 1981-09-29 | Robertshaw Controls Company | Two-wire isolated signal transmitter |
US4618941A (en) | 1983-09-19 | 1986-10-21 | Motorola, Inc. | Apparatus and method for generating filtered multilevel data from NRZ data |
JPS6377226A (en) * | 1986-09-20 | 1988-04-07 | Fujitsu Ltd | Communication system |
JPH0298238A (en) * | 1988-10-04 | 1990-04-10 | Nec Corp | Radio communication equipment |
US5280500A (en) | 1991-10-10 | 1994-01-18 | Crescendo Communications, Inc. | Method and apparatus for multilevel encoding for a local area network |
US5303395A (en) * | 1991-11-06 | 1994-04-12 | Mitsubishi Consumer Electronics America, Inc. | Power control with a constant gain amplifier for portable radio transceivers |
US5457814A (en) * | 1993-10-02 | 1995-10-10 | Nokia Mobile Phones Ltd. | Power boost system for cellular telephone |
JPH06164461A (en) * | 1992-11-20 | 1994-06-10 | Nippon Telegr & Teleph Corp <Ntt> | Earth station transmitting receiving equipment |
WO1994018761A1 (en) * | 1993-02-05 | 1994-08-18 | Kabushiki Kaisha Toshiba | Wireless telephone |
JP3094192B2 (en) * | 1993-06-22 | 2000-10-03 | 三菱電機株式会社 | Satellite broadcast receiver |
US5533054A (en) | 1993-07-09 | 1996-07-02 | Technitrol, Inc. | Multi-level data transmitter |
JPH0846542A (en) * | 1994-07-29 | 1996-02-16 | Nec Corp | Radio receiver |
EP0731586B1 (en) | 1995-03-06 | 2002-08-28 | Hewlett-Packard Company, A Delaware Corporation | Balanced ternary code |
-
1998
- 1998-10-21 US US09/176,667 patent/US6266545B1/en not_active Expired - Lifetime
-
1999
- 1999-10-08 WO PCT/SE1999/001821 patent/WO2000024121A1/en active IP Right Grant
- 1999-10-08 BR BR9914662-2A patent/BR9914662A/en not_active IP Right Cessation
- 1999-10-08 JP JP2000577766A patent/JP4557427B2/en not_active Expired - Fee Related
- 1999-10-08 EP EP99970799A patent/EP1123579B1/en not_active Expired - Lifetime
- 1999-10-08 AU AU14234/00A patent/AU756750B2/en not_active Ceased
- 1999-10-08 DE DE69922826T patent/DE69922826T2/en not_active Expired - Lifetime
- 1999-10-08 CN CNB998135119A patent/CN1183698C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0589574A1 (en) * | 1992-09-23 | 1994-03-30 | Nokia Mobile Phones Ltd. | An amplifier control system |
EP0599659A1 (en) * | 1992-11-26 | 1994-06-01 | Nec Corporation | Booster for use in combination with radio apparatus |
EP0708527A1 (en) * | 1994-10-21 | 1996-04-24 | Nec Corporation | Method and device for controlling output power of a power amplifier |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2062330A1 (en) * | 2006-09-15 | 2009-05-27 | Powerwave Technologies Sweden AB | Communication solution for antennas |
EP2062330A4 (en) * | 2006-09-15 | 2010-02-17 | Powerwave Technologies Sweden | Communication solution for antennas |
US8279127B2 (en) | 2006-09-15 | 2012-10-02 | Powerwave Technologies Sweden Ab | Communication solution for antennas |
Also Published As
Publication number | Publication date |
---|---|
EP1123579B1 (en) | 2004-12-22 |
BR9914662A (en) | 2001-07-17 |
AU1423400A (en) | 2000-05-08 |
DE69922826T2 (en) | 2005-05-25 |
DE69922826D1 (en) | 2005-01-27 |
JP4557427B2 (en) | 2010-10-06 |
JP2002528944A (en) | 2002-09-03 |
US6266545B1 (en) | 2001-07-24 |
CN1183698C (en) | 2005-01-05 |
EP1123579A1 (en) | 2001-08-16 |
CN1326615A (en) | 2001-12-12 |
AU756750B2 (en) | 2003-01-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1123579B1 (en) | Data transfer in fixed-site radio transceiver station with power supply current modulation | |
US5754594A (en) | Cooperative feedback system and method for a compensation system associated with a transmitter or codec | |
US5784405A (en) | Noncooperative feedback system and method for a compensation system associated with a transmitter or CODEC | |
US6694517B1 (en) | Broadband communication network with low power addressable tap system for controlling subscriber access | |
US5907296A (en) | Rob bit compensation system and method associated with a transmitter or codec | |
US6819760B1 (en) | Adaptive energy detector gain control in physical layer transceiver for home telephone wire network | |
CN1132469C (en) | Operation and maintenance link for antenna equipment | |
JPH0884113A (en) | Method and apparatus for controlling output power of pulse transmitter and power envelope shaping circuitry | |
CN101490973A (en) | User specific downlink power control channel Q-bit | |
CN109587022B (en) | Communication method of ignition drive bus IDBUS | |
EP1135910A1 (en) | Method for combining signals on a digital interface | |
US4095045A (en) | Method and apparatus for signaling in a communication system | |
US6434201B1 (en) | Simply-constructed digital radio communication system capable of changing transmission capacity mode | |
JP3114670B2 (en) | Virtual field equipment | |
JPH09326740A (en) | Radio communication equipment | |
US6717529B1 (en) | Radio telemetry system and method | |
JPH0666724B2 (en) | Wireless communication method | |
US8121180B1 (en) | Automatic output drive level control in home networking transceiver | |
JP2776717B2 (en) | Transmission power control method | |
KR100193813B1 (en) | Apparatus and method for sending paging data | |
CN204928814U (en) | Car communication module | |
JPH0583751A (en) | Digital trunk for line signal reception at in-band | |
WO2023091067A1 (en) | A method for configuring an operating mode for a plurality of transceivers, a computer program product, an apparatus, and a digital interface therefor | |
WO1991005410A1 (en) | Method and apparatus for adjusting the frequency of a two-way radio | |
JP2001257616A (en) | Communication unit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 99813511.9 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2000 14234 Country of ref document: AU Kind code of ref document: A |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999970799 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2000 577766 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14234/00 Country of ref document: AU |
|
WWP | Wipo information: published in national office |
Ref document number: 1999970799 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWG | Wipo information: grant in national office |
Ref document number: 14234/00 Country of ref document: AU |
|
WWG | Wipo information: grant in national office |
Ref document number: 1999970799 Country of ref document: EP |