WO2005091538A1 - ピーク電力抑圧装置およびピーク電力抑圧方法 - Google Patents
ピーク電力抑圧装置およびピーク電力抑圧方法 Download PDFInfo
- Publication number
- WO2005091538A1 WO2005091538A1 PCT/JP2005/004669 JP2005004669W WO2005091538A1 WO 2005091538 A1 WO2005091538 A1 WO 2005091538A1 JP 2005004669 W JP2005004669 W JP 2005004669W WO 2005091538 A1 WO2005091538 A1 WO 2005091538A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- power
- coefficient
- suppression
- input
- clipping
- Prior art date
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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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
- H04L27/2623—Reduction thereof by clipping
Definitions
- FIG. 3 is a diagram showing an example of an output waveform of a filter unit in a conventional peak power suppression device.
- FIG. 7 is a block diagram showing a configuration of a clipping unit in the wireless transmission apparatus according to Embodiment 1 of the present invention.
- ⁇ 8] Block diagram showing configuration of coefficient correction signal generating section in radio transmitting apparatus according to Embodiment 1 of the present invention
- FIG. 12A Diagram showing input / output power characteristics corresponding to the clipping unit when the optimal clipping coefficient is used
- FIG. 12B Diagram showing input / output power characteristics corresponding to a combination of a clipping unit and a filter unit when an optimal clipping coefficient is used.
- FIG. 15 is a diagram showing an input waveform of an OFDM signal input to the clipping unit according to the first embodiment of the present invention.
- the multiplier 153 multiplies the maximum value obtained by 151 by a feedback coefficient and outputs a clipping coefficient correction signal indicating the result of the multiplication to the coefficient correction control unit 110, and a pause signal input from the coefficient correction control unit 110.
- An operation control unit 154 that, when receiving and receiving the signal, suspends the operation of generating the clipping coefficient correction signal, and when not receiving the signal, executes the operation of generating the clipping coefficient correction signal. .
- FIG. 9 is a block diagram showing the internal configuration of the coefficient correction control unit 110.
- the coefficient correction control unit 110 includes a threshold storage unit 161 that stores a predetermined threshold, and a comparison unit that compares the clipping coefficient correction signal input from the coefficient correction signal generation unit 111 with the threshold stored in the threshold storage unit 161. 162, a counter 163 that counts the number of times that the comparison result indicating that the value indicated in the input clipping coefficient correction signal is smaller than the threshold is obtained, and outputs the total value, and an output of the counter 163 It is determined whether or not the force exceeds the threshold value, and the output value of the determination unit 1 64 and the output value of the determination unit 164 that continuously output 1 when the output exceeds the threshold and 0 when the output does not exceed the threshold, respectively.
- a selector 170 that selects a clipping coefficient correction signal from the coefficient correction signal generation unit 111 and outputs the selected signal to the coefficient setting unit 108. Have.
- an OFDM signal is generated in modulation section 101 and input to clipping section 102.
- the first signal power detection unit 141 of the coefficient correction signal generation unit 111 detects the power of the OFDM signal when input (hereinafter, referred to as “instantaneous input power Pin”).
- the second subtracter 135 calculates the corrected power ⁇ ′ by subtracting the threshold Pth force power correction amount ⁇ using the following (Equation 2).
- P, Pth— ⁇ ⁇ (Equation 2)
- Filter section 103 restricts the band of the OFDM signal input from clipping section 102, thereby removing unnecessary out-of-band components generated during clipping in clipping section 102. Then, the band-limited OFDM signal is output to DZA conversion section 104. At this time, the second signal power detection unit 142 of the coefficient correction signal generation unit 111 detects the power of the output OFDM signal (hereinafter, referred to as “instantaneous output power Pout”).
- the clipping coefficient a input to the clipping coefficient storage unit 184 is output to the first multiplier 134 of the clipping unit 102 as an appropriate coefficient obtained by the coefficient correction operation.
- Equation 7 As described above, by performing the updating process of the clipping coefficient a, it is possible to simplify the process of repeatedly modifying the clipping coefficient a, thereby reducing the load on the entire wireless transmission device 100 and It is possible to correct the clipping coefficient a with good follow-up performance with respect to the temporal variation of the input / output power characteristic corresponding to the combination of the clipping unit 102 and the filter unit 103.
- a clipping coefficient “a” corresponding to the information indicated in the system switching signal is input from the clipping coefficient table storage unit 181 to the selector 183. Is done.
- the selector 183 selects the clipping coefficient a input from the clipping coefficient table storage unit 181 and outputs it to the clipping coefficient storage unit 184.
- the coefficient correction amount ⁇ a when the coefficient correction amount ⁇ a is stably maintained at a low level for a specified time, the value of the coefficient correction amount ⁇ a is set to 0. As a result, the clipping coefficient a is not corrected. Therefore, when the clipping coefficient a is stable in an accurate state, the correction processing of the clipping coefficient a can be stopped, and the power consumption of the entire wireless transmission device 100 can be suppressed.
- coefficient correction amount ⁇ a of clipping coefficient a is calculated.
- the peak factor can be controlled in consideration of the input / output power characteristics corresponding to the combination of the clipping unit 102 and the filter unit 103, and the instantaneous input power P ( Pin) and the instantaneous output power Pout, which makes it possible to use the clipping coefficient a, thereby facilitating the realization of the desired peak factor without increasing the scale of the device and reducing the use efficiency of the storage area. Can be done.
- the coefficient correction signal generation unit 111 in FIG. 18 includes the first signal power detection unit 141, the second signal power detection unit 142, the threshold storage unit 143, and the first subtractor described in the first embodiment. 144, a second subtractor 145, a feedback coefficient storage unit 152, a multiplier 153, and an operation control unit 154. In addition to these, the coefficient correction signal generation unit 111 compares the subtraction result of the first subtractor 144 with the range setting unit 203 that stores a preset power range, and compares the subtraction result with the power range.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0509087-3A BRPI0509087A (pt) | 2004-03-22 | 2005-03-16 | supressor de potência de pico e método de supressão de potência de pico |
EP05726644A EP1717979A1 (en) | 2004-03-22 | 2005-03-16 | Peak power suppressor and peak power suppressing method |
US10/591,952 US20070188218A1 (en) | 2004-03-22 | 2005-03-16 | Peak power suppressor and peak power suppressing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-082906 | 2004-03-22 | ||
JP2004082906A JP2005269550A (ja) | 2004-03-22 | 2004-03-22 | ピーク電力抑圧装置およびピーク電力抑圧方法 |
Publications (1)
Publication Number | Publication Date |
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WO2005091538A1 true WO2005091538A1 (ja) | 2005-09-29 |
Family
ID=34994051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/004669 WO2005091538A1 (ja) | 2004-03-22 | 2005-03-16 | ピーク電力抑圧装置およびピーク電力抑圧方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070188218A1 (ja) |
EP (1) | EP1717979A1 (ja) |
JP (1) | JP2005269550A (ja) |
CN (1) | CN1934814A (ja) |
BR (1) | BRPI0509087A (ja) |
WO (1) | WO2005091538A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1835678A1 (en) * | 2006-03-17 | 2007-09-19 | Fujitsu Ltd. | Peak suppression method, and corresponding apparatus |
JP2008199490A (ja) * | 2007-02-15 | 2008-08-28 | Hitachi Kokusai Electric Inc | 送信機 |
JP2008294598A (ja) * | 2007-05-23 | 2008-12-04 | Sharp Corp | 通信装置 |
CN101072057B (zh) * | 2006-05-11 | 2012-04-18 | 大唐移动通信设备有限公司 | 一种查找信号峰值功率并削峰的方法和装置 |
Families Citing this family (20)
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JP4837669B2 (ja) * | 2005-10-06 | 2011-12-14 | パナソニック株式会社 | マルチキャリア送信装置 |
KR101083944B1 (ko) * | 2005-12-21 | 2011-11-15 | 엘지에릭슨 주식회사 | 입력신호의 전력변화에 따른 적응성 cfr 장치 및 그방법 |
US8280420B2 (en) * | 2006-04-03 | 2012-10-02 | Qualcomm Incorporated | Multi-level saturation |
JP4629611B2 (ja) * | 2006-05-17 | 2011-02-09 | ソフトバンクBb株式会社 | ピーク電力低減システム及び方法 |
JP4829705B2 (ja) | 2006-07-12 | 2011-12-07 | 富士通株式会社 | ピーク抑圧制御装置 |
JP5096179B2 (ja) * | 2008-01-28 | 2012-12-12 | ルネサスエレクトロニクス株式会社 | 適応等化装置 |
JP5125797B2 (ja) | 2008-06-19 | 2013-01-23 | 富士通株式会社 | 振幅抑圧装置および信号送信装置 |
US20090323857A1 (en) * | 2008-06-30 | 2009-12-31 | Singh Chitranjan K | Configurable sub-band filtering to reduce peak-to-average power ratio of ofdm signals or the like |
US8406113B2 (en) * | 2008-10-17 | 2013-03-26 | Freescale Semiconductor, Inc. | Peak-to-average reduction of SC-FDMA signals with frequency mask |
CN101605111B (zh) | 2009-06-25 | 2012-07-04 | 华为技术有限公司 | 一种削波控制的方法和装置 |
JP5704082B2 (ja) * | 2012-01-26 | 2015-04-22 | アイコム株式会社 | 通信機および通信方法 |
US8792572B1 (en) * | 2013-05-30 | 2014-07-29 | Telefonaktiebolaget L M Ericsson (Publ) | Universal peak power reduction in communication radios |
US11406309B2 (en) * | 2018-03-06 | 2022-08-09 | Nippon Telegraph And Telephone Corporation | Heartbeat rate calculation device and method |
US10784890B1 (en) * | 2019-05-09 | 2020-09-22 | Dialog Semiconductor B.V. | Signal processor |
US10972123B1 (en) | 2019-05-09 | 2021-04-06 | Dialog Semiconductor B.V. | Signal processing structure |
US10848174B1 (en) | 2019-05-09 | 2020-11-24 | Dialog Semiconductor B.V. | Digital filter |
US11329634B1 (en) | 2019-05-09 | 2022-05-10 | Dialog Semiconductor B.V. | Digital filter structure |
US11107453B2 (en) | 2019-05-09 | 2021-08-31 | Dialog Semiconductor B.V. | Anti-noise signal generator |
US10861433B1 (en) | 2019-05-09 | 2020-12-08 | Dialog Semiconductor B.V. | Quantizer |
US11706062B1 (en) | 2021-11-24 | 2023-07-18 | Dialog Semiconductor B.V. | Digital filter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1174862A (ja) * | 1997-08-29 | 1999-03-16 | Nippon Telegr & Teleph Corp <Ntt> | マルチキャリア信号伝送装置 |
JP2000115123A (ja) * | 1998-08-07 | 2000-04-21 | Nippon Telegr & Teleph Corp <Ntt> | Ofdm用歪補償回路 |
JP2003298549A (ja) * | 2002-04-02 | 2003-10-17 | Mitsubishi Electric Corp | マルチキャリア送信装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3722969B2 (ja) * | 1998-01-08 | 2005-11-30 | 株式会社東芝 | 再送制御方法及び再送制御装置 |
US6243413B1 (en) * | 1998-04-03 | 2001-06-05 | International Business Machines Corporation | Modular home-networking communication system and method using disparate communication channels |
US6694148B1 (en) * | 1999-07-26 | 2004-02-17 | Telefonaktiebolaget Lm Ericsson (Publ) | Transmit power control for MCPA-equipped based stations |
JP4316761B2 (ja) * | 2000-02-09 | 2009-08-19 | 株式会社日立コミュニケーションテクノロジー | 移動通信システム及び無線基地局装置 |
-
2004
- 2004-03-22 JP JP2004082906A patent/JP2005269550A/ja not_active Withdrawn
-
2005
- 2005-03-16 EP EP05726644A patent/EP1717979A1/en not_active Withdrawn
- 2005-03-16 WO PCT/JP2005/004669 patent/WO2005091538A1/ja not_active Application Discontinuation
- 2005-03-16 US US10/591,952 patent/US20070188218A1/en not_active Abandoned
- 2005-03-16 BR BRPI0509087-3A patent/BRPI0509087A/pt not_active IP Right Cessation
- 2005-03-16 CN CNA2005800091743A patent/CN1934814A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1174862A (ja) * | 1997-08-29 | 1999-03-16 | Nippon Telegr & Teleph Corp <Ntt> | マルチキャリア信号伝送装置 |
JP2000115123A (ja) * | 1998-08-07 | 2000-04-21 | Nippon Telegr & Teleph Corp <Ntt> | Ofdm用歪補償回路 |
JP2003298549A (ja) * | 2002-04-02 | 2003-10-17 | Mitsubishi Electric Corp | マルチキャリア送信装置 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1835678A1 (en) * | 2006-03-17 | 2007-09-19 | Fujitsu Ltd. | Peak suppression method, and corresponding apparatus |
US7839949B2 (en) | 2006-03-17 | 2010-11-23 | Fujitsu Limited | Peak suppression method, peak suppression apparatus and wireless transmission apparatus |
CN101072057B (zh) * | 2006-05-11 | 2012-04-18 | 大唐移动通信设备有限公司 | 一种查找信号峰值功率并削峰的方法和装置 |
JP2008199490A (ja) * | 2007-02-15 | 2008-08-28 | Hitachi Kokusai Electric Inc | 送信機 |
JP2008294598A (ja) * | 2007-05-23 | 2008-12-04 | Sharp Corp | 通信装置 |
JP4700028B2 (ja) * | 2007-05-23 | 2011-06-15 | シャープ株式会社 | 通信装置 |
Also Published As
Publication number | Publication date |
---|---|
BRPI0509087A (pt) | 2007-08-21 |
EP1717979A1 (en) | 2006-11-02 |
CN1934814A (zh) | 2007-03-21 |
JP2005269550A (ja) | 2005-09-29 |
US20070188218A1 (en) | 2007-08-16 |
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