EP1579594A1 - A control solution for transmission power of mobile handset - Google Patents
A control solution for transmission power of mobile handsetInfo
- Publication number
- EP1579594A1 EP1579594A1 EP03780473A EP03780473A EP1579594A1 EP 1579594 A1 EP1579594 A1 EP 1579594A1 EP 03780473 A EP03780473 A EP 03780473A EP 03780473 A EP03780473 A EP 03780473A EP 1579594 A1 EP1579594 A1 EP 1579594A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- power
- unit
- sampling
- transmit
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a wireless telecommunication system in TDD
- SIR Signal-to-lnterference Ratio
- Gain calibration is the general means to compensate for unintentional gain
- gain fluctuations can be caused for various reasons when
- signals are transmitted, such as aging of components, changes in ambient
- Another object of the present invention is to provide an apparatus and its
- the third object of the invention is to provide an apparatus and its method
- a transceiver for receiving and transmitting radio frequency(RF) signals
- a front end unit for selecting a receiver mode or a transmitter mode according
- a baseband processing unit for providing the said control signal to the said baseband
- Fig. 1 illustrates the structure of a current multi-band, multi-mode transceiver.
- Fig. 2 provides the structure of the multi-band, multi-mode transceiver
- TD-SCDMA is a telecommunication system based on TDD mode, so the
- TD-SCDMA as an example.
- transceiver in the present invention additionally has a sampling unit, as coupling
- TPTCL transmitter power tracking and controlling loop
- invention consists of a transceiver, as antenna 1, a front-end unit 6, and a
- the said front-end unit 6 consists of a switch unit 2, a coupling unit 3, a
- the said baseband processing unit 16 consists of a transmitting baseband
- TPTCL signal generating module 22 TPTCL signal generating module 22.
- switch unit 2 is composed of transmitter/receiver mode selection
- TPTCL signal generating module 22 consists of
- the transceiver works as follows:
- transmitter/receiver mode selection switch 20 in switch unit 2 switches antenna 1 to be connected with receiving module 5, RF signals received from antenna 1 will be
- the transceiver in the present invention When the transceiver in the present invention is in receiver mode, it works the
- the transceiver When the transceiver is in the mode to transmit wireless signals, the transceiver is in the mode to transmit wireless signals, the
- transmitter/receiver mode selection switch 20 in switch unit 2 switches antenna 1 to
- processing unit 16 is transmitted from antenna 1 by transmit/receive mode
- receiving baseband processing unit 8 is transformed to signal in digital domain
- the actual output power can be calculated
- the error signal can be used to obtain a power comparison signal in
- the power compensation signal in analog form will be obtained, such as a TPTCL signal, which can be used to control the AGC (automatic gain control)
- modulated, amplified and filtered by transmitting module 4 will be transmitted via
- the sampling value of the actual transmitter power can be obtained by
- a sampling module mainly composed of coupling unit 3 and switch unit 2, the
- the power compensation signal can be
- module mainly composed of adding unit 13 and transmitter power control unit 12.
- the present invention relates to an apparatus and its method thereof for
- TPC signal provided by transmitting
- baseband processing unit 7 is also utilized, so the apparatus and its method
- receiving module 5 when TPTCL signal is generated, receiving module 5 and
- receiving baseband processing unit 8 are utilized to process the coupling signal, so
- TDD mode TD-SCDMA may not be limited to TDD mode TD-SCDMA system, but also applicable for
Abstract
A mobile terminal and method for TDD mode wireless communication systems, comprises an antenna (1), receiving and transmitting radio frequency signals; a front end unit (16), selecting a receiver mode or a transmitter mode according to a control signal, and sampling a signal to be transmitted to generate a sampling signal which is fed back to a baseband unit (16) for calculating the actual transmission power when the mobile ternimal is in the transmitter mode, and a baseband processing unit (16), providing the control signal to the front end unit, providing the signal to be transmitted to the front end unit when the mobile terminal is in the transmitter mode, and generating a power compensation signal to adjust a power of the signal to be transmitted outputted from the front end unit according to the comparison result of the calculated actual transmission power and the expected transmission power.
Description
A CONTROL SOLUTION FOR TRANSMISSION POWER OF MOBILE HANDSET
FIELD OF THE INVENTION
The present invention relates to a wireless telecommunication system in TDD
(Time Division Duplex) mode; and, more particularly, to an apparatus for controlling
the transmitter power in TDD-based wireless telecommunication systems and its
method thereof.
DESCRIPTION OF THE PRIOR ART
In wireless telecommunication systems, self-interference produced by the
transmitter power of base stations and that of user equipments, has a direct
influence upon the system performance. In an actual system, each user terminal
transmits data using the minimal signal level in the case of reaching a certain
Signal-to-lnterference Ratio (SIR), so as to limit the harm that transmitter power
brings to the telecommunication system.
In order to ensure the communication quality of the system and maintain the
power of the signal to be transmitted at a desired level, it is necessary to
compensate for unintentional gain fluctuations observed in various components of
the transmit chain.
Gain calibration is the general means to compensate for unintentional gain
fluctuations. However, gain fluctuations can be caused for various reasons when
signals are transmitted, such as aging of components, changes in ambient
temperature, air pressure, humidity level, saturation of amplifiers, and changes in
the traffic load, and etc, any of which can lead to unexpected gain changes. So, it's
impossible for calibration procedures to maintain the transmitter's output power at a
certain level precisely all the time. Once these gain fluctuations occur, the operating
points of telecommunication facilities will drift, and consequently the
communication quality will degrade.
Therefore, a method based on control system is needed to make gain
compensation. By comparing the expected output power with the actual output
power, it is capable of adjusting the overall gain after various components of the
transmit chain, thus compensating for the unintentional gain fluctuations.
A method of transmitter power tracking loop (TPTL) is disclosed in patent
publication US 6286994B1 , Sep.11, 2001. In this method, the actual output power
level is obtained by detecting, sampling and filtering the actual output power, then
the unintentional gain fluctuations are compensated by TPTL after using a series of
complicated algorithms, so as to match the actual output power with an expected
and calculated transmit power.
But this method is particularly used for base stations and is very complicated
indeed. It's still a hard problem to be solved in the art as how to provide a method
and an apparatus for controlling transmitter power of a mobile terminal, by fully
utilizing existing components of wireless telecommunication systems and without
making much modification to them.
SUMMARY OF THE INVENTION
It is, therefore, a primary object of the invention to provide an apparatus and
its method thereof for controlling transmitter power of the wireless
telecommunication systems in TDD mode, which capable of compensating
effectively for various unintentional gain fluctuations in transmission chains, and
thus to improve the system performance.
Another object of the present invention is to provide an apparatus and its
method thereof for controlling transmitter power of the wireless telecommunication
systems in TDD mode, which capable of compensating effectively for various
expected gain fluctuations in transmission chains, and thus to improve the
communication quality of the systems.
The third object of the invention is to provide an apparatus and its method
thereof for controlling transmitter power of the wireless telecommunication systems
in TDD mode, which nicely uses the existing transceiver hardware of the wireless
telecommunication systems, and thus has such features as low cost and easy
implementation.
To achieve the object above, a mobile terminal for the wireless
telecommunication systems in TDD mode, as proposed in the present invention,
comprising:
A transceiver, for receiving and transmitting radio frequency(RF) signals;
A front end unit, for selecting a receiver mode or a transmitter mode according
to a control signal, and sampling a signal to be transmitted to generate a sampling
signal when the mobile terminal is in the transmitter mode; and
A baseband processing unit, for providing the said control signal to the said
front end unit, providing the said signal to be transmitted to the said front end unit
when the mobile terminal is in the transmitter mode, and generating a power
compensation signal to adjust the power of the said signal to be transmitted output
from the front end unit according to the said sampling signal from the said front end
unit.
To realize the object above, a method for a mobile terminal in TDD mode
wireless telecommunication systems, as proposed in the present invention,
comprising:
Selecting a receiver mode or a transmitter mode;
Separating a signal to be transmitted into the main signal and the sampling
signal, transmitting the main signal and outputting the sampling signal as a
feedback signal, when the mobile terminal is in the transmitter mode;
Generating a power compensation signal to adjust the power of the signal to
be transmitted according to the said sampling signal.
BRIEF DESCRIPTION OF THE DRAWINGS
Further description of the invention will be given below, in conjunction with the
accompanying drawings, wherein:
Fig. 1 illustrates the structure of a current multi-band, multi-mode transceiver.
Fig. 2 provides the structure of the multi-band, multi-mode transceiver,
proposed in the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
TD-SCDMA is a telecommunication system based on TDD mode, so the
preferred embodiment will unfold a detailed description of the invention, in
conjunction with the accompanying drawings, by taking a mobile terminal in
TD-SCDMA as an example.
Comparing the multi-band, multi-mode transceiver in the present invention as
indicated in Fig. 2 with a current one as shown in Fig.1 , it can be seen that the
transceiver in the present invention additionally has a sampling unit, as coupling
unit 3, a sampling switch, as coupling switch 21 , and a power compensation signal
generating module, as TPTCL (transmitter power tracking and controlling loop)
signal generating module 22. How it works and how it connects with components in
current transceivers will be presented as follows.
As shown in Fig. 2, the multi-band, multi-mode transceiver in the present
invention consists of a transceiver, as antenna 1, a front-end unit 6, and a
baseband processing unit 16.
The said front-end unit 6 consists of a switch unit 2, a coupling unit 3, a
transmitting module 4, and a receiving module 5.
The said baseband processing unit 16 consists of a transmitting baseband
processing unit 7, a receiving baseband processing unit 8, a control unit 15 and a
TPTCL signal generating module 22.
Wherein the switch unit 2 is composed of transmitter/receiver mode selection
switch 20 and coupling switch 21 ; TPTCL signal generating module 22 consists of
expected power calculating unit 9, actual power calculating unit 10, comparison unit
11 , adding unit 13 and DAC unit 14.
In TDD mode, when the control signal from control unit 15 indicates receiver
mode or transmitter mode, the transceiver works as follows:
1. Receive wireless signals
When the transceiver is in the mode to receive wireless signals,
transmitter/receiver mode selection switch 20 in switch unit 2 switches antenna 1 to
be connected with receiving module 5, RF signals received from antenna 1 will be
transmitted to receiving module 5 by transmitter/receiver mode selection switch 20,
and demodulated in receiving module 5, then the demodulated signals will be
transmitted to receiving baseband processing unit 8 in the baseband processing
unit 16, where the general baseband receiving and processing are to be done.
When the transceiver in the present invention is in receiver mode, it works the
same as current ones, and the transmitter composed of transmitting module 4 and
transmitting baseband processing unit 7, doesn't work at all.
2. Transmit wireless signals
When the transceiver is in the mode to transmit wireless signals, the
transmitter/receiver mode selection switch 20 in switch unit 2 switches antenna 1 to
be connected with coupling unit 3, at the same time, coupling unit 21 in switch unit
2 will be connected with coupling unit 3 and receiving module 5 respectively. After
being modulated, amplified and filtered by transmitting module 4, the main signal of
the transmitter signal from transmitting baseband processing unit 7 in baseband
processing unit 16, is transmitted from antenna 1 by transmit/receive mode
selection switch 20, and a small part of the transmitter signal is input to receiving
module 5 as coupling signal by coupling switch 21.
In receiving module 5, after being demodulated, the coupling signal input is
transmitted to receiving baseband processing unit 8 in baseband processing unit
16.
In baseband processing unit 16, the signal that has been processed by
receiving baseband processing unit 8, is transformed to signal in digital domain,
and then transmitted to actual power calculating unit 10.
In actual power calculating unit 10, the actual output power can be calculated
according to the digital signal input.
Meanwhile, in expected power calculating unit 9, the expected output power
can be calculated according to transmit baseband processing signal in digital
domain provided by transmitting baseband processing unit 7.
The expected output power calculated and the actual output power calculated
will be respectively input to comparison unit 11 , where the expected output power
and the actual output power are compared periodically, and then an error signal is
generated. The error signal can be used to obtain a power comparison signal in
digital domain after being calibrated, such as a TPTL signal, which is to be input to
adding unit 13.
In adding unit 13, a TPC signal from transmitter power control unit 12 in
transmitting baseband processing unit 7 will be combined with the said TPTL signal,
and the combined signal is input to DAC unit 14. After digital/analog conversion in
DAC unit 14, the power compensation signal in analog form will be obtained, such
as a TPTCL signal, which can be used to control the AGC (automatic gain control)
in transmitting module 4 of front-end unit 6.
With this TPTCL signal, the AGC in transmitting module 4 of front-end unit 6
will adjust the power of the signal to be transmitted from transmitting baseband
processing unit 7 in baseband processing unit 16, to compensate for various
unintentional gain fluctuations in the transmission chain.
With the unintentional gain fluctuations being compensated, RF signal
modulated, amplified and filtered by transmitting module 4 will be transmitted via
coupling unit 3, transmitter/receiver mode selection switch 20 and antenna 1.
As shown in the description of the preferred embodiment of the present
invention, in conjunction with the accompanying drawings, the essence of the
invention is: the sampling value of the actual transmitter power can be obtained by
a sampling module mainly composed of coupling unit 3 and switch unit 2, the
difference between the actual output power and the expected output power can be
acquired by a power judging module mainly composed of actual power calculating
unit 10 and comparison unit 11 , and the power compensation signal can be
generated to adjust the level of the actual output power by a power compensation
module mainly composed of adding unit 13 and transmitter power control unit 12.
The present invention relates to an apparatus and its method thereof for
controlling the transmitter power of mobile terminal in TDD mode wireless
telecommunication system. When signals are transmitted, a small part of output
signal is taken as the coupling signal, and fed back to baseband processing unit 16
by coupling switch 21. According to the said coupling signal, TPTCL signal
generating module 22 in baseband processing unit 16 generates the TPTCL signal
to adjust the power of the signal to be transmitted, thus the apparatus and its
method described in the present invention can effectively compensate for various
unintentional gain fluctuations observed in various components of the transmit
chain, and improve the performance of the telecommunication system.
Further, when TPTCL signal is generated, TPC signal provided by transmitting
baseband processing unit 7 is also utilized, so the apparatus and its method
described in the present invention can effectively compensate for various expected
gain fluctuations observed in various components of the transmit chain, and
improve the communication quality of the system.
Additionally, when TPTCL signal is generated, receiving module 5 and
receiving baseband processing unit 8 are utilized to process the coupling signal, so
the apparatus and its method described in the present invention can make
hardware design simple, improve the performance of the telecommunication
system and lower the cost.
Of course, while the invention has been shown and described with respect to
the preferred embodiment, it will be understood by those skilled in the art that it
may not be limited to mobile terminals in TDD mode systems, but also applicable
for base stations in TDD mode systems.
At the same time, while the invention has been shown and described with
respect to the preferred embodiment, it will be understood by those skilled in the art
that it may not be limited to TDD mode TD-SCDMA system, but also applicable for
other TDD mode wireless telecommunication systems.
While the invention has been shown and described with respect to the
preferred embodiment, it will also be understood by those skilled in the art that
modifications may be made without departing from the spirit and scope of the
invention as defined in the following claims.
Claims
1. A mobile terminal in TDD mode wireless communication systems,
comprising:
a transceiver, receiving and transmitting radio frequency signals;
a front end unit, selecting a receiver mode or a transmitter mode according to
a control signal, and sampling a signal to be transmitted to generate a sampling
signal when the mobile terminal is in the transmitter mode; and
a baseband processing unit, providing said control signal to said front end unit,
providing said signal to be transmitted to said front end unit when the mobile
terminal is in the transmitter mode, and generating a power compensation signal to
adjust a power of said signal to be transmitted outputted from said front end unit
according to said sampling signal from said front end unit.
2. The mobile terminal of claim 1 , wherein said front end unit includes:
a switch unit, switching to said receiver mode or said transmitter mode
according to said control signal from said baseband processing unit, and when said
switch unit is in the transmitter mode, transmitting main signal of said received
signal to be transmitted via said transceiver and outputting said sampling signal of
said signal to be transmitted as a feedback signal;
a sampling unit, when said switch unit is in the transmitter mode, sampling said signal to be transmitted to generate said sampling signal and inputting said
sampling signal to said switch unit;
a transmitting module, when the switch unit is in the transmitter mode,
processing said signal to be transmitted from said baseband processing unit to
provide processed signal to said sampling unit, and adjusting the power of said
signal to be transmitted according to said power compensation signal from said
baseband processing unit; and
a receiving module, receiving said sampling signal via said switch unit and
providing said sampling signal to said baseband processing unit, when said switch
unit is switched to the transmitter mode.
3. The mobile terminal of claim 2, wherein said switch unit includes:
a transmitter/receiver mode selection switch, transmitting the main signal from
said sampling unit via said transceiver when said switch unit is in the transmitter
mode; and
a sampling switch, feeding-back said sampling signal from said sampling unit
to said receiving module when said switch unit is in the transmitter mode.
4. The mobile terminal of any of claims 1-3, wherein said baseband
processing unit includes:
a transmit baseband processing unit, outputting a signal related to a transmit power and a transmit power control signal; and
a power compensation signal generating module, calculating a power
comparison signal according to said sampling signal and said signal related to the
transmit power, and generating said power compensation signal according to said
transmit power control signal and said power comparison signal.
5. The mobile terminal of claim 4, wherein said power compensation signal
generating module includes:
an actual power calculating unit, calculating an actual output power according
to said sampling signal;
a comparison unit, obtaining said power comparison signal according to said
actual output power calculated by said actual power calculating unit and said signal
related to the transmit power; and
a combining unit, combining said transmit power control signal provided by
said transmit baseband processing unit and said power comparison signal
outputted from said comparison unit to generate said power compensation signal.
6. The mobile terminal of claim 4, wherein said power compensation signal
generating module includes:
an actual power calculating unit, calculating an actual output power according
to said sampling signal; an expected power calculating unit, calculating an expected output power
according to said signal related to the transmit power provided by said transmit
baseband processing unit;
a comparison unit, obtaining said power comparison signal according to said
actual output power calculated by said actual power calculating unit and said
expected output power calculated by said expected power calculating unit; and
a combining unit, combining said transmit power control signal provided by
said transmit baseband processing unit and said power comparison signal
outputted from said comparison unit to generate said power compensation signal.
7. The mobile terminal of claims 5 or 6, wherein said comparison unit obtains
said power comparison signal periodically according said actual output power and
said signal related to the transmit power.
8. The mobile terminal of claim 1 , wherein the mobile terminal is applied to
wireless communication systems in TDD mode.
9. A method for a mobile terminal in TDD mode wireless communication
systems, comprising:
selecting a receiver mode or a transmitter mode, wherein when the mobile
terminal is in the transmitter mode,
separating a signal to be transmitted into main signal and a sampling signal, transmitting said main signal and outputting said sampling signal as a feedback
signal, and
generating a power compensation signal to adjust a power of said signal to be
transmitted according to said sampling signal.
10. The method of claim 9, wherein a switch unit selects the receiver mode
or the transmitter mode according to a receiver/transmitter mode control signal.
11. The method of claims 9 or 10, wherein a receiving module receives
said sampling signal and outputs said sampling signal as said feedback signal
when the mobile terminal is in the transmitter mode.
12. The method of any of claims 9-11, wherein adjusting said signal to be
transmitted is completed by a receive baseband processing unit, a transmit
baseband processing unit and a power compensation signal generating module,
wherein
said receive baseband processing unit, processing said received sampling
, signal and providing said processed sampling signal to said power compensation
signal generating module;
said transmit baseband processing unit, providing a signal related to a
transmit power and a transmit power control signal to said power compensation
signal generating module; and said power compensation signal generating module, calculating a power
comparison signal according to said processed sampling signal and said signal
related to the transmit power, and generating said power compensation signal
according to said transmit power control signal provided by said transmit baseband
processing unit.
13. The method of claim 12, wherein a method executed by said power
compensation signal generating module further includes:
calculating an actual output power according to said processed sampling
signal;
obtaining said power comparison signal according to said actual output power
and said signal related to the transmit power from said transmit baseband
processing unit; and
combining said transmit power control signal provided by said transmit
baseband processing unit and said power comparison signal to generate said
power compensation signal.
14. The method of claim 12, wherein a method executed by said power
compensation signal generating module further includes:
calculating an actual output power according to said processed sampling
signal; calculating an expected output power according to said signal related to the
transmit power provided by said transmit baseband processing unit;
obtaining said power comparison signal according to said actual output power
and said expected output power; and
combining said transmit power control signal provided by said transmit
baseband processing unit and said power comparison signal, processing a
combined signal to generate said power compensation signal.
15. The method of claims 13 or 14, wherein the step of obtaining said
power comparison signal according to said actual output power and said signal
related to the transmit power is carried out periodically.
16. The method of claim 9, wherein the method is applied to wireless
communication systems in TDD mode.
17. A device for transmit power control, comprising:
a power sampling module, sampling an actual transmit power;
a power judging module, comparing said actual output power to an expected
output power according to a received power sampling signal; and
a power compensation module, generating a power compensation signal
according to an output signal from said power judging module and compensating
said actual output power.
18. A transmitter device in wireless communication systems, comprising:
a transmitting means, transmitting signals; and
a transmit power adjusting means, sampling a power of a signal to be
transmitted by said transmitting means to obtain a sampling signal of an actual
transmit power, comparing the actual transmit power to an expected transmit power
according to said sampling signal, and adjusting the power of said signal to be
transmitted by said transmitting means according to a comparison result.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021589925A CN1512801A (en) | 2002-12-27 | 2002-12-27 | Mobile terminal with controlled transmitting power and its method |
| CN02158992 | 2002-12-27 | ||
| PCT/IB2003/006174 WO2004059873A1 (en) | 2002-12-27 | 2003-12-23 | A control solution for transmission power of mobile handset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1579594A1 true EP1579594A1 (en) | 2005-09-28 |
Family
ID=32661091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03780473A Withdrawn EP1579594A1 (en) | 2002-12-27 | 2003-12-23 | A control solution for transmission power of mobile handset |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1579594A1 (en) |
| JP (1) | JP2006512828A (en) |
| KR (1) | KR20050095594A (en) |
| CN (1) | CN1512801A (en) |
| AU (1) | AU2003288631A1 (en) |
| TW (1) | TW200520425A (en) |
| WO (1) | WO2004059873A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4654648B2 (en) * | 2004-10-06 | 2011-03-23 | 株式会社ケンウッド | Apparatus and method for adjusting transmission output of wireless communication device |
| CN102202022B (en) * | 2011-03-31 | 2014-02-05 | 京信通信系统（中国）有限公司 | Method and device for protecting power amplifier in DPD (Digital Pre-Distortion) system |
| CN103490790B (en) * | 2013-09-04 | 2015-05-20 | 乐鑫信息科技（上海）有限公司 | Low-power-consumption optimal-receiving method and system supporting IEEE802.11ac standard and IEEE802.11n standard |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07143056A (en) * | 1993-09-24 | 1995-06-02 | Hitachi Ltd | Mobile object communication equipment |
| JPH10173547A (en) * | 1996-12-11 | 1998-06-26 | Matsushita Electric Ind Co Ltd | Transmission output detection circuit |
-
2002
- 2002-12-27 CN CNA021589925A patent/CN1512801A/en active Pending
-
2003
- 2003-12-05 TW TW092134439A patent/TW200520425A/en unknown
- 2003-12-23 WO PCT/IB2003/006174 patent/WO2004059873A1/en not_active Application Discontinuation
- 2003-12-23 AU AU2003288631A patent/AU2003288631A1/en not_active Abandoned
- 2003-12-23 JP JP2004563491A patent/JP2006512828A/en not_active Withdrawn
- 2003-12-23 EP EP03780473A patent/EP1579594A1/en not_active Withdrawn
- 2003-12-23 KR KR1020057011820A patent/KR20050095594A/en not_active Application Discontinuation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004059873A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200520425A (en) | 2005-06-16 |
| JP2006512828A (en) | 2006-04-13 |
| KR20050095594A (en) | 2005-09-29 |
| CN1512801A (en) | 2004-07-14 |
| AU2003288631A1 (en) | 2004-07-22 |
| WO2004059873A1 (en) | 2004-07-15 |
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