JP2001515690A - Rfアンプの拡散スペクトルパイロットを抽出する方法および装置 - Google Patents
Rfアンプの拡散スペクトルパイロットを抽出する方法および装置Info
- Publication number
- JP2001515690A JP2001515690A JP53726999A JP53726999A JP2001515690A JP 2001515690 A JP2001515690 A JP 2001515690A JP 53726999 A JP53726999 A JP 53726999A JP 53726999 A JP53726999 A JP 53726999A JP 2001515690 A JP2001515690 A JP 2001515690A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pilot
- clipping
- carrier
- spread spectrum
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3223—Modifications of amplifiers to reduce non-linear distortion using feed-forward
- H03F1/3229—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction
- H03F1/3235—Modifications of amplifiers to reduce non-linear distortion using feed-forward using a loop for error extraction and another loop for error subtraction using a pilot signal
-
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 少なくとも1の搬送波信号を含むRF信号を送信する方法であって、 (A)RF信号に拡散スペクトルパイロットを加えるステップと、 (B)RF信号の少なくとも一部を受信するステップと、 (C)前記RF信号の少なくとも一部から搬送波信号をクリッピングするステ ップと、 (D)前記RF信号の少なくとも一部からクリッピングされた前記搬送波信号 を拡散するステップと、 (E)前記RF信号の少なくとも一部から拡散スペクトルパイロット信号を逆 拡散するステップと、 (F)前記RF信号の前記拡散スペクトルパイロット信号を減らすための制御 信号を生成するため、逆拡散された前記パイロット信号を検出するステップとを 有することを特徴とする方法。 2. 前記クリッピングするステップ(C)は、前記搬送波信号から比較的一定 のパーセンテージのパワーをクリッピングするステップ を有することを特徴とする請求項1記載の方法。 3. 前記クリッピングするステップ(C)は、基準信号および検出信号から得 られる比較信号に従って前記搬送波信号を調整するステップと、調整した搬送波 信号をクリッピングするステップと、検出器信号を生成するように調整した搬送 波信号を検出するステップと を有することを特徴とする請求項1記載の方法。 4. 前記クリッピングするステップ(C)は、 検出信号を生成するように前記搬送波信号を検出するステップと、前記検出信 号に従って前記搬送波信号をクリッピングするステップと を有することを特徴とする請求項1記載の方法。 5. RF信号を発生するRFアンプシステムであって、 (A)RF信号に拡散スペクトルパイロットを加えるように構成する拡散回路 と、 (B)RF出力信号の少なくとも一部を受信し、RF信号の前記少なくとも一 部の少なくとも1の搬送波をクリッピングするように構成するクリッピング回路 と、 (C)前記クリッピング回路につながり、RF出力信号の前記少なくとも一部 を受信するように構成する拡散/逆拡散回路と、ここで、 この拡散/逆拡散回路は、クリッピングされる前記少なくとも1の搬送波を拡 散し、RF信号の前記少なくとも一部の拡散スペクトルパイロットを逆拡散する ように構成し、 (D)逆拡散されるパイロットを検出し、RF信号の拡散スペクトルパイロッ トを減らすための制御信号を供給するように構成する制御回路と を有することを特徴とするRFアンプシステム。 6. 前記クリッピング回路は、前記少なくとも1の搬送波信号から比較的一定 なパーセンテージのパワーをクリッピングするように構成する ことを特徴とする請求項5記載のシステム。 7. 前記クリッピング回路は、前記少なくとも1の搬送波信号を特定のレベル に調整し、調整した前記少なくとも1の搬送波信号を比較的一定なパーセンテー ジの分クリッピングするように構成する ことを特徴とする請求項5記載のシステム。 8. 前記クリッピング回路は、前記少なくとも1の搬送波信号のレベルを検出 し、そのレベルに従って前記少なくとも1の搬送波信号を減衰しクリッピングす るように構成する ことを特徴とする請求項5記載のシステム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/006,539 US5999048A (en) | 1998-01-13 | 1998-01-13 | Method and apparatus for spread spectrum pilot extraction for RF amplifiers |
US09/006,539 | 1998-01-13 | ||
PCT/US1999/000168 WO1999037020A1 (en) | 1998-01-13 | 1999-01-13 | Method and apparatus for spread spectrum pilot extraction for rf amplifiers |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001515690A true JP2001515690A (ja) | 2001-09-18 |
JP3851976B2 JP3851976B2 (ja) | 2006-11-29 |
Family
ID=21721373
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11004307A Pending JPH11259100A (ja) | 1998-01-13 | 1999-01-11 | 励起ベクトルの符号化方法 |
JP53726999A Expired - Fee Related JP3851976B2 (ja) | 1998-01-13 | 1999-01-13 | Rfアンプの拡散スペクトルパイロットを抽出する方法および装置 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11004307A Pending JPH11259100A (ja) | 1998-01-13 | 1999-01-11 | 励起ベクトルの符号化方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US5999048A (ja) |
EP (1) | EP0974191B1 (ja) |
JP (2) | JPH11259100A (ja) |
DE (1) | DE69931219T2 (ja) |
WO (1) | WO1999037020A1 (ja) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6553211B1 (en) * | 1998-08-20 | 2003-04-22 | Lucent Technologies Inc. | Method and apparatus for adjusting pilot signal relative to input signal |
US6411644B1 (en) * | 1998-09-29 | 2002-06-25 | Lucent Technologies Inc. | Frequency hop pilot technique for a control system that reduces distortion produced by electrical circuits |
JP2001053552A (ja) * | 1999-08-10 | 2001-02-23 | Nec Corp | フィードフォワード増幅回路、及びフィードフォワード増幅回路における非線形歪の補償方法。 |
US6392480B1 (en) * | 1999-08-19 | 2002-05-21 | Lucent Technologies Inc. | Alternating gain and phase control system and method |
US6496708B1 (en) * | 1999-09-15 | 2002-12-17 | Motorola, Inc. | Radio frequency coupler apparatus suitable for use in a multi-band wireless communication device |
US6320461B1 (en) * | 2000-05-12 | 2001-11-20 | Jhong Sam Lee | Ultra-linear feedforward RF power amplifier |
US6608523B1 (en) * | 2000-08-24 | 2003-08-19 | Lucent Technologies Inc. | System and method for producing a pilot signal in a distortion reduction system |
WO2002052717A2 (en) * | 2000-12-22 | 2002-07-04 | Paradigm Wireless Communications Llc | Feed-forward amplifier loop control utilizing if signal processing |
US6897723B2 (en) * | 2000-12-22 | 2005-05-24 | Paradigm Wireless Communications, Llc | Feed-forward amplifier loop control utilizing if signal processing |
US6525603B1 (en) * | 2001-01-05 | 2003-02-25 | Remec, Inc. | Feedforward amplifier linearization adapting off modulation |
JP3582589B2 (ja) | 2001-03-07 | 2004-10-27 | 日本電気株式会社 | 音声符号化装置及び音声復号化装置 |
SE0102026D0 (sv) * | 2001-06-07 | 2001-06-07 | Ericsson Telefon Ab L M | Method and arrangement relating to multicarrier power amplifiers |
US6734726B2 (en) * | 2001-06-29 | 2004-05-11 | Remec, Inc. | Balanced distortion reduction circuit |
CA2361015A1 (en) * | 2001-11-02 | 2003-05-02 | Spectrum Target Detection Inc. | Spread spectrum radar with leak compensation at baseband |
US6556076B1 (en) | 2001-12-17 | 2003-04-29 | Powerwave Technologies, Inc. | Feed forward amplifier with amplifier stage failure detection using pilot tones |
US6677817B2 (en) | 2001-12-17 | 2004-01-13 | Powerwave Technologies, Inc. | Feed forward amplifier with amplifier stage failure detection using pilot tones |
US20040227661A1 (en) * | 2003-05-12 | 2004-11-18 | Godsy Robert C. | Doppler radar system for measuring range, speed, and relative direction of movement of an object |
EP2145386B1 (en) | 2007-05-04 | 2013-11-20 | Astrium Limited | Multiport amplifiers in communications satellites |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2046413C (en) * | 1990-07-11 | 1994-01-04 | Shoichi Narahashi | Feed-forward amplifier |
US5130663A (en) * | 1991-04-15 | 1992-07-14 | Motorola, Inc. | Feed forward amplifier network with frequency swept pilot tone |
US5193224A (en) * | 1991-04-24 | 1993-03-09 | Northern Telecom Limited | Adaptive phase control for a power amplifier predistorter |
US5386198A (en) * | 1993-01-28 | 1995-01-31 | Telefonaktiebolaget L M Ericsson | Linear amplifier control |
JP3320210B2 (ja) * | 1994-05-31 | 2002-09-03 | 富士通株式会社 | 初期動作時不要波出力防止型フィードフォワード増幅装置 |
WO1996003802A1 (en) * | 1994-07-28 | 1996-02-08 | Aval Communications, Inc. | A novel cancellation loop, for a feed-forward amplifier, employing an adaptive controller |
US5455537A (en) * | 1994-08-19 | 1995-10-03 | Radio Frequency Systems, Inc. | Feed forward amplifier |
US5644268A (en) * | 1995-01-06 | 1997-07-01 | Spectrian, Inc. | Feed forward RF amplifier for combined signal and error amplification |
US5621354A (en) * | 1995-10-17 | 1997-04-15 | Motorola, Inc. | Apparatus and method for performing error corrected amplification in a radio frequency system |
-
1998
- 1998-01-13 US US09/006,539 patent/US5999048A/en not_active Expired - Lifetime
-
1999
- 1999-01-11 JP JP11004307A patent/JPH11259100A/ja active Pending
- 1999-01-13 WO PCT/US1999/000168 patent/WO1999037020A1/en active IP Right Grant
- 1999-01-13 DE DE69931219T patent/DE69931219T2/de not_active Expired - Lifetime
- 1999-01-13 EP EP99902056A patent/EP0974191B1/en not_active Expired - Lifetime
- 1999-01-13 JP JP53726999A patent/JP3851976B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1999037020A1 (en) | 1999-07-22 |
EP0974191A1 (en) | 2000-01-26 |
US5999048A (en) | 1999-12-07 |
EP0974191B1 (en) | 2006-05-10 |
DE69931219D1 (de) | 2006-06-14 |
JP3851976B2 (ja) | 2006-11-29 |
JPH11259100A (ja) | 1999-09-24 |
DE69931219T2 (de) | 2007-05-10 |
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