KR950022223A - Tap coefficient update control system of adaptive equalizer - Google Patents

Tap coefficient update control system of adaptive equalizer Download PDF

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Publication number
KR950022223A
KR950022223A KR1019930030526A KR930030526A KR950022223A KR 950022223 A KR950022223 A KR 950022223A KR 1019930030526 A KR1019930030526 A KR 1019930030526A KR 930030526 A KR930030526 A KR 930030526A KR 950022223 A KR950022223 A KR 950022223A
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South Korea
Prior art keywords
tap coefficient
error signal
coefficient update
signal
control system
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KR1019930030526A
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Korean (ko)
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KR960014403B1 (en
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양균석
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김주용
현대전자산업 주식회사
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Priority to KR1019930030526A priority Critical patent/KR960014403B1/en
Publication of KR950022223A publication Critical patent/KR950022223A/en
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Publication of KR960014403B1 publication Critical patent/KR960014403B1/en

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    • 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
    • H04B1/76—Pilot transmitters or receivers for control of transmission or for equalising

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

Abstract

본 발명은 적응 등화기의 탭 계수 갱신 제어 시스템에 관한 것으로, 판별 신호의 오차가 크고 작음을 판단하여 탭 계수 갱신 작업을 제어함으로써 등화기의 수렴소고들 빠르게 하는 것에 관한 것이다.The present invention relates to a tap coefficient update control system of an adaptive equalizer. The present invention relates to speeding up convergence problems of an equalizer by controlling a tap coefficient update operation by determining that an error of a discrimination signal is large and small.

일반적으로 종래의 적응 등화기의 탭 계수 갱신 제어 시스템 방식은 적응 등호의 초기에는 부호간 간섭들에 의한 선형적 왜곡이 심하여 상기 판별 신호가 잘못판별된 값으로 출력될 수도 있으므로 이러한 경우 적응 등화는 잘못된 방향으로 진행이 이루어지게 되며 등화하는데 많은 시간이 소요되는 문제점이 있다.In general, in the tap coefficient update control system of the conventional adaptive equalizer, since the linear distortion due to inter-signal interferences is severe at the beginning of the adaptive equalizer, the discrimination signal may be output as an incorrectly discriminated value. Progress is made in the direction and there is a problem that takes a long time to equalize.

본 발명은 종래의 이런 문제점을 감안하여 심한 선형 왜곡에 의해 잘못 판별된 판별 신호가 출력되는지를 판별하여 필터의 필터의 탭 계수 갱신 작업을 제어하며 잘못된 판별신호가 출력되고 있는지를 판단하기 위해서 현재부터 일정시간 이전In view of the above-mentioned problems, the present invention determines whether a discrimination signal that is incorrectly determined by severe linear distortion is output to control the tap coefficient update operation of the filter of the filter, and to determine whether an incorrect discrimination signal is being output. Before a certain time

까지의 오차신호의 평균값을 구하여 현재의 오차신호가 오차신호의 평균값보다 특정 기준값이상으로 어긋나는가를 측정하는 방법을 이용한 것이다.The average value of the error signals up to is used to measure whether the current error signal deviates by more than a specific reference value from the average value of the error signal.

즉, 적응 등화기의 탭 계수 갱신 제어 시스템 방식은 결국 심한 선형 왜곡에 의해 잘못 판별된 판별신호가 출력될 경우 허용 오차신호를 "0"값으로 출력하여 필터의 탭 계수 갱신이 수행되지 않도록 제어함으로써 잘못된 방향으로의 탭 계수 갱신이 이루이지지 않게 하는 것이다.That is, the tap coefficient update control system method of the adaptive equalizer outputs a tolerance error signal as a value of "0" when the discrimination signal incorrectly determined by severe linear distortion is output so that the tap coefficient update of the filter is not performed. This prevents tap coefficient updates in the wrong direction.

Description

저응 등화기의 탭 계수 갱신 제어 시스템Tap coefficient update control system of low equalizer

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명의 적응 등화기 블럭도.3 is an adaptive equalizer block diagram of the present invention.

제4도는 오차신호 허용 판별부의 세부 블럭도이다.4 is a detailed block diagram of the error signal permission determining unit.

Claims (2)

유한충격필터부(1), 신호정보 판별부(2), 감산부(3), 루프이득 곱셈부(4) 및 오차신호 허용 판별부(5)로이루어진 적응등화기 시스템에 있어서, 감산부(3)및 루프이득 곱셈부(4)에 연결되어 오차신호(14)의 허용여부를 결정하여 허용오차신호(16)를 출력하는 오차신호허용판별부(5)를 부가하는 것을 특징으로 하는 탭 계수 갱신 제어 시스템.In the adaptive equalizer system consisting of a finite shock filter unit 1, a signal information discriminating unit 2, a subtracting unit 3, a loop gain multiplier 4, and an error signal tolerance discriminating unit 5, a subtracting unit ( 3) and a tap coefficient characterized in that it is connected to the loop gain multiplier 4 to determine whether to allow the error signal 14 and to add an error signal allowance discriminating part 5 for outputting the tolerance signal 16. Update control system. 제1항에 있어서, 평균값 생성부(31), 감산부(32), 제1비교부(33), 제2비교부(34), 앤드(AND)로직 및 선택부(35)로 이루어진 오차신호 허용 판별 시스템은 평균값 생성부(31)에서 오차신호(14)를 출력하고 감산부(32)에서 구한 오차신호(14)와 평균오차신호(41)의 차이를 제1비교부(33)에서는 최대 기준값과 비교하고 최대 기준값보다 작고 최소 기준값보다 클 때에만 오차신호(14)를 그외의 경우에는"0"신호를 허용오차신호(16)로서 선택하는 것을 특징으로 하는 탭 계수 갱신 제어 시스템.2. An error signal according to claim 1, comprising an average value generator 31, a subtractor 32, a first comparator 33, a second comparator 34, an AND logic and a selector 35. The allowable discrimination system outputs the error signal 14 from the mean value generator 31 and maximizes the difference between the error signal 14 and the mean error signal 41 obtained from the subtractor 32 in the first comparator 33. The tap coefficient update control system, characterized in that the error signal (14) is otherwise selected as the tolerance signal (16) only when compared with the reference value and smaller than the maximum reference value and larger than the minimum reference value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930030526A 1993-12-29 1993-12-29 Adaptive equalizer KR960014403B1 (en)

Priority Applications (1)

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KR1019930030526A KR960014403B1 (en) 1993-12-29 1993-12-29 Adaptive equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930030526A KR960014403B1 (en) 1993-12-29 1993-12-29 Adaptive equalizer

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KR950022223A true KR950022223A (en) 1995-07-28
KR960014403B1 KR960014403B1 (en) 1996-10-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100360273B1 (en) * 2000-12-28 2002-11-09 엘지전자 주식회사 Linear compensation adaptive equalizer apparatus and his controll method for digital television repeater

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100467528B1 (en) * 2002-09-10 2005-01-24 주식회사 버카나와이어리스코리아 High-speed adaptive Equalizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100360273B1 (en) * 2000-12-28 2002-11-09 엘지전자 주식회사 Linear compensation adaptive equalizer apparatus and his controll method for digital television repeater

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