KR0133552B1 - 무선송신기에 포함되는 단말증폭기의 비선형성을 보정하는 방법 - Google Patents
무선송신기에 포함되는 단말증폭기의 비선형성을 보정하는 방법Info
- Publication number
- KR0133552B1 KR0133552B1 KR1019910701075A KR910701075A KR0133552B1 KR 0133552 B1 KR0133552 B1 KR 0133552B1 KR 1019910701075 A KR1019910701075 A KR 1019910701075A KR 910701075 A KR910701075 A KR 910701075A KR 0133552 B1 KR0133552 B1 KR 0133552B1
- Authority
- KR
- South Korea
- Prior art keywords
- values
- value
- digital
- terminal
- quadrature
- 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.)
- Expired - Fee Related
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
-
- 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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
-
- 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
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
- H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
- H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
- H04L27/2071—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the carrier phase, e.g. systems with differential coding
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/02—Details
- H03C1/06—Modifications of modulator to reduce distortion, e.g. by feedback, and clearly applicable to more than one type of modulator
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Nonlinear Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Amplifiers (AREA)
Abstract
Description
Claims (3)
- 무선송신기에 대하여 도래정보신호의 순간 및 누적된 위상각의 2진값을 축적하는 주어진 길이의 도래신호벡터(α)의 메모리 탐색표에 의거하여 선형디지털변조의 직각형 무선송신기에 포함되는 전송기능(HR,HØ)을 가진 단말기(F)에 관한 방법으로서, 상기 디지털값은 상기 신호백터(α)의 수단에 의하여 애드레스되고, 상기 단말기에 공급되는 직각성분에 속하는 사인 및 코사인 파형의 디지탈값(I(t,α), Q(t,α))을 기억하는 장치(ST,CT)와; 이러한 직각변조된 무선신호(r(t,α)를 단말기(F)에 공급하기전에 2개의 반송파성분(sin WCt,cos WCt)에 프로젝트하기 위하여 상기 직각성분을 곱셈·가산하는 장치(M1,M2;ADD)와 여러 가지 입력신호를 단말기에 공급하는 진폭 및 위상값에 의존하는 상기 디지털 직각성분값(I(t,α), Q(t,α))을 변형하는 장치를 포함하는 비선형성을 보정하는 방법에 있어서, 무선송신기의 도래정보신호의 여러 가지 값을 단말기의 전송기능의 다수의 역증폭값(HR -1) 및 대응위상값(HØ)을 작동전에 기억하는 장치(MH1,MH2)와 a. 샘플링시간(t)에 비보정으로서, 상기 직각성분값으로부터 상기 직각변조무선신호(r(t,α)의 절대값을 계산하는 단계와, b. 상기 계산된 절대값에 의존하는 다수 기억된 역증폭값 및 대응 위상값을 애드레스하는 단계와, c. 단계 b에서 애드레스된 상기 위상값의 사인 및 코사인 성분값(sin HØ,cos HØ)을 형성하는 단계와, d. 상기 기억된 값에만 의존하여 단말기(F)에서의 비선형성의 무선신호를 보정하는신호벡터(α)의 각각의 순간에서 변형된 진폭 및 위상을 지닌 변형된 직각성분값(i(t,α), q(t,α))을 얻도록 단계 b에서 얻어진 역증폭값을 비변형된 직각성분값(I(t,α), Q(t,α))과 결합된 단계 c에서 얻어진 사인 및 코사인값을 곱셈ㆍ가산하는 단계에 의하여 상기 직각성분값을 변형하는 장치를 구비한 것을 특징으로 하는 비선형성을 보정하는 방법.
- 제 1 항에 있어서, 상기 곱셈·가산하는 단계 d에 새로 변형된 직각디지털 값(i(t,α), q(t,α))이 상기 역증폭값(HR -1)과 곱셈한 비변형된 상기 디지털 값의 절대값과 같은 절대값을 갖도록 단말기의 상기 역증폭값(HR -1)을 상기 위상값(HØ)의 사인·코사인 성분과 결합된 상기 비변형된 직각성분값(I(t,α), Q(t,α))에 곱셈하는 것을 특징으로 하는 비선형성을 보정하는 방법.
- 제 1 항에 있어서, 변형된 직각성분값을 얻기 위한 곱셈·가산하는 단계 d는 다음 관계식i(t,α)=HR -1(R)[I(t,α) cos HØ(R)-Q(t,α) sin HØ(R)]q(t,α)=HR -1(R)[I(t,α) sin HØ(R)+Q(t,α) cos HØ(R)]에서의 파형이 새로 변형된 디지털값(i(t,α), q(t,α))을 얻지만, 단 HR(R), 및 HØ(R)은 각각 단말기(F)의 기억되고 애드레스된 값인 것을 특징으로 하는 비선형성을 보정하는 방법.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9000219-7 | 1990-01-22 | ||
| SE9000219A SE465494B (sv) | 1990-01-22 | 1990-01-22 | Foerfarande att kompensera foer olineariteter i en slutfoerstaerkare |
| PCT/SE1990/000829 WO1991011053A1 (en) | 1990-01-22 | 1990-12-13 | A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR920702079A KR920702079A (ko) | 1992-08-12 |
| KR0133552B1 true KR0133552B1 (ko) | 1998-04-23 |
Family
ID=20378316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019910701075A Expired - Fee Related KR0133552B1 (ko) | 1990-01-22 | 1990-12-13 | 무선송신기에 포함되는 단말증폭기의 비선형성을 보정하는 방법 |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US5191597A (ko) |
| EP (1) | EP0441110B1 (ko) |
| JP (1) | JP3034033B2 (ko) |
| KR (1) | KR0133552B1 (ko) |
| CN (1) | CN1024383C (ko) |
| AU (1) | AU633189B2 (ko) |
| BR (1) | BR9007227A (ko) |
| CA (1) | CA2050350C (ko) |
| DE (1) | DE69023326T2 (ko) |
| HK (1) | HK36896A (ko) |
| MY (1) | MY104811A (ko) |
| NZ (1) | NZ236504A (ko) |
| SE (1) | SE465494B (ko) |
| WO (1) | WO1991011053A1 (ko) |
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| DE4302456A1 (de) * | 1993-01-29 | 1994-08-04 | Telefunken Sendertechnik | Modulationsverfahren und -schaltung für HF-Signale |
| US6088590A (en) | 1993-11-01 | 2000-07-11 | Omnipoint Corporation | Method and system for mobile controlled handoff and link maintenance in spread spectrum communication |
| US6005856A (en) | 1993-11-01 | 1999-12-21 | Omnipoint Corporation | Communication protocol for spread spectrum wireless communication system |
| US5832028A (en) | 1994-09-09 | 1998-11-03 | Omnipoint Corporation | Method and apparatus for coherent serial correlation of a spread spectrum signal |
| US5963586A (en) | 1994-09-09 | 1999-10-05 | Omnipoint Corporation | Method and apparatus for parallel noncoherent correlation of a spread spectrum signal |
| US5953370A (en) | 1994-09-09 | 1999-09-14 | Omnipoint Corporation | Apparatus for receiving and correlating a spread spectrum signal |
| US5754585A (en) | 1994-09-09 | 1998-05-19 | Omnipoint Corporation | Method and apparatus for serial noncoherent correlation of a spread spectrum signal |
| US5754584A (en) | 1994-09-09 | 1998-05-19 | Omnipoint Corporation | Non-coherent spread-spectrum continuous-phase modulation communication system |
| US5648982A (en) | 1994-09-09 | 1997-07-15 | Omnipoint Corporation | Spread spectrum transmitter |
| US5757847A (en) | 1994-09-09 | 1998-05-26 | Omnipoint Corporation | Method and apparatus for decoding a phase encoded signal |
| US5610940A (en) | 1994-09-09 | 1997-03-11 | Omnipoint Corporation | Method and apparatus for noncoherent reception and correlation of a continous phase modulated signal |
| US5881100A (en) | 1994-09-09 | 1999-03-09 | Omnipoint Corporation | Method and apparatus for coherent correlation of a spread spectrum signal |
| US5856998A (en) | 1994-09-09 | 1999-01-05 | Omnipoint Corporation | Method and apparatus for correlating a continuous phase modulated spread spectrum signal |
| US5680414A (en) | 1994-09-09 | 1997-10-21 | Omnipoint Corporation | Synchronization apparatus and method for spread spectrum receiver |
| US5692007A (en) | 1994-09-09 | 1997-11-25 | Omnipoint Corporation | Method and apparatus for differential phase encoding and decoding in spread-spectrum communication systems with continuous-phase modulation |
| US5629956A (en) | 1994-09-09 | 1997-05-13 | Omnipoint Corporation | Method and apparatus for reception and noncoherent serial correlation of a continuous phase modulated signal |
| US5627856A (en) | 1994-09-09 | 1997-05-06 | Omnipoint Corporation | Method and apparatus for receiving and despreading a continuous phase-modulated spread spectrum signal using self-synchronizing correlators |
| US5659574A (en) | 1994-09-09 | 1997-08-19 | Omnipoint Corporation | Multi-bit correlation of continuous phase modulated signals |
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| US5548253A (en) * | 1995-04-17 | 1996-08-20 | Omnipoint Corporation | Spectrally efficient quadrature amplitude modulator |
| US5832022A (en) * | 1995-06-02 | 1998-11-03 | Omnipoint Corporation | Method and apparatus for controlling the modulation index of continuous phase modulated (CPM) signals |
| EP0760567A3 (de) * | 1995-08-30 | 2000-09-06 | Siemens Aktiengesellschaft | Digitaler QAM-modulator |
| US5903823A (en) * | 1995-09-19 | 1999-05-11 | Fujitsu Limited | Radio apparatus with distortion compensating function |
| US5617058A (en) * | 1995-11-13 | 1997-04-01 | Apogee Technology, Inc. | Digital signal processing for linearization of small input signals to a tri-state power switch |
| FR2746562B1 (fr) * | 1996-03-22 | 1998-06-05 | Thomson Csf | Emetteur de signaux de radiophonie digitale |
| US5751114A (en) * | 1996-05-24 | 1998-05-12 | International Business Machines Corporation | Apparatus, method and article of manufacture for carrier frequency compensation in a FM radio transmitter |
| US6185259B1 (en) | 1996-06-12 | 2001-02-06 | Ericsson Inc. | Transmitter/receiver for GMSK and offset-QAM |
| US5815531A (en) * | 1996-06-12 | 1998-09-29 | Ericsson Inc. | Transmitter for encoded data bits |
| KR100266817B1 (ko) * | 1997-01-31 | 2000-09-15 | 윤종용 | 피드포워드방식의선형증폭장치및방법 |
| US6282228B1 (en) * | 1997-03-20 | 2001-08-28 | Xircom, Inc. | Spread spectrum codes for use in communication |
| FI105366B (fi) * | 1997-10-29 | 2000-07-31 | Nokia Networks Oy | Linearisointimenetelmä ja vahvistinjärjestely |
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| AU4924399A (en) * | 1998-06-19 | 2000-01-05 | Datum Telegraphic Inc. | Circuit and methods for compensating for imperfections in amplification chains in a linc or other amplification system |
| US6947469B2 (en) | 1999-05-07 | 2005-09-20 | Intel Corporation | Method and Apparatus for wireless spread spectrum communication with preamble processing period |
| JP4359864B2 (ja) * | 2000-04-03 | 2009-11-11 | 日本ビクター株式会社 | 直交周波数分割多重装置および直交周波数分割多重方法 |
| US6794939B2 (en) * | 2002-05-31 | 2004-09-21 | Lucent Technologies Inc. | Signal predistortion using a combination of multiple predistortion techniques |
| FR2860109A1 (fr) * | 2003-09-22 | 2005-03-25 | Thomson Licensing Sa | Recepteur incluant une compensation de linearite dans la bande de reception |
| WO2007110805A2 (en) * | 2006-03-28 | 2007-10-04 | Nxp B.V. | Transmitter with delay mismatch compensation |
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| US3777275A (en) * | 1972-01-31 | 1973-12-04 | Bell Telephone Labor Inc | Linear amplification with nonlinear devices |
| NL7709917A (nl) * | 1977-09-09 | 1979-03-13 | Philips Nv | Systeem voor datatransmissie met behulp van een hoekgemoduleerde draaggolf van constante amplitude. |
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-
1990
- 1990-01-22 SE SE9000219A patent/SE465494B/sv not_active IP Right Cessation
- 1990-12-13 BR BR909007227A patent/BR9007227A/pt not_active IP Right Cessation
- 1990-12-13 DE DE69023326T patent/DE69023326T2/de not_active Expired - Fee Related
- 1990-12-13 WO PCT/SE1990/000829 patent/WO1991011053A1/en not_active Ceased
- 1990-12-13 JP JP3503495A patent/JP3034033B2/ja not_active Expired - Lifetime
- 1990-12-13 CA CA002050350A patent/CA2050350C/en not_active Expired - Fee Related
- 1990-12-13 AU AU72251/91A patent/AU633189B2/en not_active Ceased
- 1990-12-13 EP EP90850404A patent/EP0441110B1/en not_active Expired - Lifetime
- 1990-12-13 KR KR1019910701075A patent/KR0133552B1/ko not_active Expired - Fee Related
- 1990-12-17 NZ NZ236504A patent/NZ236504A/xx unknown
-
1991
- 1991-01-08 MY MYPI91000017A patent/MY104811A/en unknown
- 1991-01-22 US US07/644,442 patent/US5191597A/en not_active Expired - Lifetime
- 1991-01-22 CN CN91100384A patent/CN1024383C/zh not_active Expired - Fee Related
-
1996
- 1996-02-29 HK HK36896A patent/HK36896A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2050350C (en) | 2000-07-25 |
| SE9000219L (sv) | 1991-07-23 |
| HK36896A (en) | 1996-03-08 |
| DE69023326D1 (de) | 1995-12-07 |
| AU633189B2 (en) | 1993-01-21 |
| NZ236504A (en) | 1993-05-26 |
| US5191597A (en) | 1993-03-02 |
| CN1024383C (zh) | 1994-04-27 |
| KR920702079A (ko) | 1992-08-12 |
| CA2050350A1 (en) | 1991-07-23 |
| JPH04504494A (ja) | 1992-08-06 |
| AU7225191A (en) | 1991-08-05 |
| JP3034033B2 (ja) | 2000-04-17 |
| EP0441110A1 (en) | 1991-08-14 |
| EP0441110B1 (en) | 1995-11-02 |
| SE9000219D0 (sv) | 1990-01-22 |
| CN1053719A (zh) | 1991-08-07 |
| SE465494B (sv) | 1991-09-16 |
| DE69023326T2 (de) | 1996-04-11 |
| MY104811A (en) | 1994-05-31 |
| BR9007227A (pt) | 1992-02-18 |
| WO1991011053A1 (en) | 1991-07-25 |
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