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KR960003401A - Blind equalizer - Google Patents

Blind equalizer Download PDF

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Publication number
KR960003401A
KR960003401A KR1019940013290A KR19940013290A KR960003401A KR 960003401 A KR960003401 A KR 960003401A KR 1019940013290 A KR1019940013290 A KR 1019940013290A KR 19940013290 A KR19940013290 A KR 19940013290A KR 960003401 A KR960003401 A KR 960003401A
Authority
KR
South Korea
Prior art keywords
filter
signal
error
coefficient
cma
Prior art date
Application number
KR1019940013290A
Other languages
Korean (ko)
Other versions
KR970010092B1 (en
Inventor
김영상
이상욱
조남익
양윤기
Original Assignee
배순훈
대우전자 주식회사
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
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR94013290A priority Critical patent/KR970010092B1/en
Publication of KR960003401A publication Critical patent/KR960003401A/en
Application granted granted Critical
Publication of KR970010092B1 publication Critical patent/KR970010092B1/en

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Classifications

    • 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
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • H04L25/0305—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure using blind adaptation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/203—Details of error rate determination, e.g. BER, FER or WER

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

본 발명은 블라인드 등화기의 CMA구조에 관한 것으로, 채널을 통과한 수신 신호를 소정 대역에 대하여 필터링하기 위한 필터와, 상기 필터의 출력신호에 대하여 CMA(Constant Modulus Algorithm)을 적용하여 등화 에러를 검출하기 위한 에러 검출부와, 상기 수신신호를 입력으로 하여 상기 에러 검출부에서 출력되는 에러신호에 의해 상기 필터의 계수를 갱신하기 위한 필터 계수 갱신부를 포함하는 블라인드 등화기에 있어서, 상기 CMA는 내부 세트와 외부 세트로 형성되고, 상기 내부 세트와 외부 세트의 중간값에 임계 기준 신호를 형성되어 등화 에러를 줄임으로써 등화기의 성능을 향상시키노록 한 것이다.The present invention relates to a CMA structure of a blind equalizer, and detects an equalization error by applying a filter for filtering a received signal passing through a channel for a predetermined band, and applying a constant modulus algorithm (CMA) to the output signal of the filter. And a filter coefficient updating unit for updating the coefficient of the filter by an error signal outputted from the error detection unit by inputting the received signal as an input. And a threshold reference signal is formed at an intermediate value between the inner set and the outer set to reduce the equalization error, thereby improving the performance of the equalizer.

Description

블라인드 등화기Blind equalizer

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도는 본 발명에 따른 CMA의 구조를 나타내는 도면.3 shows the structure of a CMA according to the invention.

제4a도 및 b도는 34 QAM 및 64 QAM의 CMA 및 MCMA의 실행하여 BER을 상호 비교한 그래프.4a and b are graphs comparing BER by running of CMA and MCMA of 34 QAM and 64 QAM.

Claims (2)

채널을 통과한 수신 신호를 소정 대역에 대하여 필터링 하기 위한 필터와, 상기 필터의 출력신호에 대하여 CMA(Constant Modulus Algorithm)을 적용하여 등화 에러를 검출하기 위한 에러 검출부와, 상기 수신 신호를 입력으로 하여 상기 에러 검출부에서 출력되는 에러신호에 의해 상기 필터의 계수를 갱신하기 위한 필터 계수갱신부를 포함하는 블라인드 등화기에 있어서, 상기 CMA는 내부 세트와 외부 세트로 형성되고, 상기 내부 세트와 외부 세트의 중간값에 임계 기준 신호를 형성한 것을 특징으로 하는 블라인드 등화기.A filter for filtering a received signal passing through a channel for a predetermined band, an error detector for detecting an equalization error by applying a constant modulus algorithm (CMA) to the output signal of the filter, and the received signal as an input In the blind equalizer comprising a filter coefficient updating unit for updating the coefficient of the filter by the error signal output from the error detection unit, the CMA is formed of an inner set and an outer set, the intermediate value of the inner set and the outer set And a threshold reference signal formed in the blind equalizer. 제1항에 있어서, 상기 임계 기준 신호보다 안쪽으로 신호가 올 경우 내부 계수 모듈러스를 사용하고 상기 임계 기준 신호보다 바깥쪽으로 올 경우에는 외부 계수 모듈러스를 사용하여 상기 필터 계수 갱신식에 사용하는 것을 특징으로 하는 블라인드 등화기.The method of claim 1, wherein an internal coefficient modulus is used when the signal comes inward from the threshold reference signal, and an external coefficient modulus is used when the signal comes out from the threshold reference signal. Blind equalizer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR94013290A 1994-06-14 1994-06-14 Blind equalizer KR970010092B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR94013290A KR970010092B1 (en) 1994-06-14 1994-06-14 Blind equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR94013290A KR970010092B1 (en) 1994-06-14 1994-06-14 Blind equalizer

Publications (2)

Publication Number Publication Date
KR960003401A true KR960003401A (en) 1996-01-26
KR970010092B1 KR970010092B1 (en) 1997-06-21

Family

ID=19385200

Family Applications (1)

Application Number Title Priority Date Filing Date
KR94013290A KR970010092B1 (en) 1994-06-14 1994-06-14 Blind equalizer

Country Status (1)

Country Link
KR (1) KR970010092B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100341808B1 (en) * 1999-09-03 2002-06-24 윤종용 Apparatus and method for selecting operation of a channel equalizer
US8010859B2 (en) 2006-07-24 2011-08-30 Samsung Electronics Co., Ltd. Data transmitting and receiving system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100341808B1 (en) * 1999-09-03 2002-06-24 윤종용 Apparatus and method for selecting operation of a channel equalizer
US8010859B2 (en) 2006-07-24 2011-08-30 Samsung Electronics Co., Ltd. Data transmitting and receiving system

Also Published As

Publication number Publication date
KR970010092B1 (en) 1997-06-21

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