KR970008941A - Signal quality evaluation method for direct sequential frequency spreading receiver - Google Patents

Signal quality evaluation method for direct sequential frequency spreading receiver Download PDF

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Publication number
KR970008941A
KR970008941A KR1019960032116A KR19960032116A KR970008941A KR 970008941 A KR970008941 A KR 970008941A KR 1019960032116 A KR1019960032116 A KR 1019960032116A KR 19960032116 A KR19960032116 A KR 19960032116A KR 970008941 A KR970008941 A KR 970008941A
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KR
South Korea
Prior art keywords
phase
symbol
signal quality
average
demodulator
Prior art date
Application number
KR1019960032116A
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Korean (ko)
Inventor
다까노리 사에끼
유끼오 후꾸조
앤드렌 칼
씨 파카첼리스 존
브이 루카스 레너드
스넬 짐
브이 곡헤일 라빈드라
스넬 제임스
히로시 시노하라
더블유 프로그 페리
Original Assignee
가네꼬 히사시
닛뽕덴끼 가부시끼가이샤
리차드 엘 발렌타인
해리스 코포레이션
이데이 노브유끼
소니 가부시끼가이샤
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from JP7200593A external-priority patent/JPH0936768A/en
Priority claimed from JP7209240A external-priority patent/JP2792475B2/en
Priority claimed from US08/509,586 external-priority patent/US5732105A/en
Priority claimed from US08/509,588 external-priority patent/US5654991A/en
Priority claimed from US08/509,589 external-priority patent/US5675339A/en
Application filed by 가네꼬 히사시, 닛뽕덴끼 가부시끼가이샤, 리차드 엘 발렌타인, 해리스 코포레이션, 이데이 노브유끼, 소니 가부시끼가이샤 filed Critical 가네꼬 히사시
Publication of KR970008941A publication Critical patent/KR970008941A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details 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
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7073Synchronisation aspects
    • H04B1/7075Synchronisation aspects with code phase acquisition
    • H04B1/70751Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70753Partial phase search
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/18Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22Demodulator circuits; Receiver circuits

Abstract

본 발명은 입력 기호 스트림을 수신하는 무선 복조기 내에서 신호 품질을 평가하는 방법에 관한 것으로서, 입력 스트림 내의 각각의 기호들의 위상-성분 부분을 샘플링하는 단계와, 상기 위상-성분 부분의 각각의 샘플에 대하여 위상편차를 결정하는 단계와, 복수개의 샘플 위상편차로부터 신호 품질 평가를 계산하는 단계를 포함한다. 상기 신호 품질 평가는 샘플 위상편차의 소정 갯수의 평균 크기일 수 있다.A method for evaluating signal quality in a wireless demodulator that receives an input symbol stream, the method comprising: sampling a phase-component portion of each symbol in an input stream; Determining a phase deviation for a plurality of sample phase deviations; and calculating a signal quality estimate from a plurality of sample phase deviations. The signal quality estimate may be an average size of a predetermined number of sample phase deviations.

Description

직접 순차 주파수확산방식 수신기를 위한 신호품질평가 방법Signal quality evaluation method for direct sequential frequency spreading receiver

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제1도는 복조기의 일실시예를 도시하는 블럭선도.1 is a block diagram showing an embodiment of a demodulator; Fig.

Claims (9)

기호 스트림의 입력을 수신하는 DPSK 복조기에 있어서 신호품질을 평가하는 방법으로서, 입력 스트림내의 각각의 기호들의 위상-성분 부분을 샘플링하는 단계와, 각각의 샘플들에 대하여 위상편차를 결정하는 단계, 및 복수개의 샘플 위상편차로부터 신호품질평가를 계산하는 단계로 구성되며, 샘플링하기 전에 기호를 크기 및 위상 형식으로 변환하는 단계를 포함하는 것을 특징으로 하는 직접 순차 주파수확산방식 수신기를 위한 신호품질평가 방법.CLAIMS What is claimed is: 1. A method for evaluating signal quality in a DPSK demodulator that receives input of a symbol stream, comprising: sampling a phase-component portion of each symbol in an input stream; determining a phase deviation for each sample; Calculating a signal quality estimate from a plurality of sample phase deviations, and converting the symbols to a magnitude and phase format before sampling. ≪ Desc / Clms Page number 19 > 제1항에 있어서, 상기 위상편차를 결정하는 단계에 각각이 샘플들에 대하여 위상 편차를 결정하기 위하여 위상동기루프로 위상-성분 부분을 제공하는 단계가 포함되는 것을 특징으로 하는 방법.2. The method of claim 1, wherein determining the phase deviation comprises providing a phase-component portion in a phase-locked loop to determine a phase deviation for each of the samples. 제2항에 있어서, 위상동기루프로 평균 위상을 제공하는 상기 신호의 위상-성분 부분으로부터 상기 기호의 소정 갯수의 평균 위상을 결정하는 단계를 포함하는 것을 특징으로 하는 방법.3. The method of claim 2, comprising determining a predetermined number of average phases of the symbols from a phase-component portion of the signal providing an average phase in a phase locked loop. 제1항 내지 제3항의 어느 한 항에 있어서, 상기 신호품질평가는 샘플 위상편차의 소정 갯수의 평균 크기인 것을 특징으로 하는 방법.4. The method of any one of claims 1 to 3, wherein the signal quality estimate is an average magnitude of a predetermined number of sample phase deviations. 신호품질평가가 복조기 성능의 수준을 평가하기 위하여 사용되는 DPSK 복조기에 있어서 신호품질을 평가하는 방법으로서, (a)DPSK 복조기로의 기호 스트림이 입력될때 각각의 기호를 샘플링하는 단계와, (b) 상기 샘플들을 극좌표 형식으로 변환하는 단계와, (c) 상기 극좌표 형식 중 위상-성분 부분을 이용하여 각각의 샘플들에 대하여 위상편차를 결정하는 단계, 및 (d) 복수 개의 상기 샘플 위상편차로부터 신호품질평가를 계산하는 단계로 구성되며, 그리고 (e) 상기 기호 스트림은 복조될 데이터의 스트림인 것을 특징으로 하는 직접 순차 주파수확산방식 수신기를 위한 신호품질평가 방법.A method for evaluating signal quality in a DPSK demodulator wherein a signal quality evaluation is used to assess a level of demodulator performance, comprising: (a) sampling each symbol when a symbol stream to a DPSK demodulator is input; (b) (C) determining a phase deviation for each of the samples using the phase-component portion of the polar coordinate format; and (d) Calculating a quality estimate, and (e) the symbol stream is a stream of data to be demodulated. 제5항에 있어서, 상기 신호품질평가는 샘플 위상편차, 바람직하게는 첫번째 안테나로부터 수신된 기호블럭내의 샘플 위상편차의 소정 갯수의 평균 크기인 것을 특징으로 하는 방법.6. The method of claim 5, wherein the signal quality estimate is an average magnitude of a predetermined number of sample phase deviations, preferably sample phase deviations within symbol blocks received from the first antenna. 제5항 혹은 제6항에 있어서, 각각의 기호는 한번씩 샘플링되는 것을 특징으로 하는 방법.7. A method according to claim 5 or 6, characterized in that each symbol is sampled once. 데이터 무선 복조기에 있어서, 신호품질을 평가하는 방법으로서, (a)데이터 무선 복조기로 데이터 기호 스트림의 I 및 Q성분을 제공하는 단계와, (b) 각각의 기호에 대하여 상기 I 및 Q성분을 결합하는 단계와, (c) 기호 당 하나의 샘플의 속도로 각각의 기호에 대하여 상기 결합된 I 및 Q성분을 샘플링하는 단계와, (d) 상기 샘플들을 극좌표 형식으로 변환하는 단계와, (e)각각의 샘플들에 대하여 위상편차를 결정하기 위하여 위상동기루프로 극좌표 형식의 위상-성분 부분을 제공하는 단계와, (f) 복수개의 샘플 위상편차의 평균 크기를 계산하는 단계, 및 (g) 신호 품질평가로서 복조기에 대한 입력으로 평균 크기를 제공하는 단계, 및 (h) 기호의 위상-성분 부분으로부터 기호의 소정 갯수의 평균 위상을 결정하고, 위상동기루프로 평균 위상을 제공하는 단계로 구성되는 것을 특징으로 하는 직접 순차 주파수확산방식 수신기를 위한 신호품질평가 방법.A data wireless demodulator comprising: (a) providing a data wireless demodulator with I and Q components of a data symbol stream; (b) combining the I and Q components for each symbol; (C) sampling the combined I and Q components for each symbol at a rate of one sample per symbol; (d) converting the samples to a polar coordinate format; (e) (F) calculating an average magnitude of a plurality of sample phase deviations, and (g) comparing the average magnitude of the plurality of sample phase deviations Providing an average magnitude as an input to the demodulator as a quality estimate, and (h) determining an average phase of a predetermined number of symbols from the phase-component portion of the symbol and providing an average phase in a phase locked loop For direct sequence frequency spreading system receiver, characterized in that the property signal quality evaluation method. 제8항에 있어서, 다른 신호품질평가로서 복조기에 대한 입력으로 기호의 크기-성분 부분의 평균을 제공하는 단계를 포함하는 것을 특징으로 하는 방법.9. The method of claim 8, comprising providing an average of a magnitude-component portion of a symbol as an input to a demodulator as another signal quality estimate. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960032116A 1995-07-13 1996-07-31 Signal quality evaluation method for direct sequential frequency spreading receiver KR970008941A (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP95-200593 1995-07-13
JP7200593A JPH0936768A (en) 1995-07-13 1995-07-13 Reception ic and superheterodyne receiver
JP7209240A JP2792475B2 (en) 1995-07-25 1995-07-25 Input buffer
JP95-209240 1995-07-25
US08/509,586 US5732105A (en) 1995-07-31 1995-07-31 Method of estimating signal quality in a DPSK demodulator
US08/509588 1995-07-31
US08/509586 1995-07-31
US08/509,588 US5654991A (en) 1995-07-31 1995-07-31 Fast acquisition bit timing loop method and apparatus
US08/509589 1995-07-31
US08/509,589 US5675339A (en) 1995-07-31 1995-07-31 A/D reference level adjustment circuit to maintain optimum dynamic range at the A/D

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100465431B1 (en) * 2000-03-22 2005-01-13 엘지전자 주식회사 Process Method in No. 7 Signalling Network when signalling Message does not route

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JPS62133828A (en) * 1985-12-05 1987-06-17 Fujitsu Ltd Signal quality detection system
US5001724A (en) * 1989-01-13 1991-03-19 Hewlett-Packard Company Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulated signal
US5490177A (en) * 1994-03-23 1996-02-06 Motorola, Inc. Method and apparatus for determining signal quality
US5594758A (en) * 1992-12-31 1997-01-14 Pacific Communication Sciences, Inc. Frequency controller and method of correcting phase estimates in a PSK demodulator using frequency control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62133828A (en) * 1985-12-05 1987-06-17 Fujitsu Ltd Signal quality detection system
US5001724A (en) * 1989-01-13 1991-03-19 Hewlett-Packard Company Method and apparatus for measuring phase accuracy and amplitude profile of a continuous-phase-modulated signal
US5594758A (en) * 1992-12-31 1997-01-14 Pacific Communication Sciences, Inc. Frequency controller and method of correcting phase estimates in a PSK demodulator using frequency control
US5625652A (en) * 1992-12-31 1997-04-29 Pacific Communication Sciences, Inc. Timing recovery controller and method for adjusting the timing of synchronizing windows in a PSK demodulator
US5490177A (en) * 1994-03-23 1996-02-06 Motorola, Inc. Method and apparatus for determining signal quality

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100465431B1 (en) * 2000-03-22 2005-01-13 엘지전자 주식회사 Process Method in No. 7 Signalling Network when signalling Message does not route

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