KR950016107A - Intellectual Recovery Equalizer Using Spectral Prediction and Its Initialization Method - Google Patents

Intellectual Recovery Equalizer Using Spectral Prediction and Its Initialization Method Download PDF

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KR950016107A
KR950016107A KR1019930025128A KR930025128A KR950016107A KR 950016107 A KR950016107 A KR 950016107A KR 1019930025128 A KR1019930025128 A KR 1019930025128A KR 930025128 A KR930025128 A KR 930025128A KR 950016107 A KR950016107 A KR 950016107A
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eigenvector
initial
equalizer
calculating
received
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KR1019930025128A
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KR0152028B1 (en
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한동석
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김광호
삼성전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/0398Restoration of channel reciprocity

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

Abstract

본 발명은 자력복구등화기의 계수를 초기화할 때 스펙트럼 예측기법을 간소화한 방법을 사용하여 등화기를 빠른 속도로 수렴시킬 수 있도록 한 스펙트럼 예측을 이용한 자력복구등화기 및 그의 초기화방법에 관한 것이다. 이러한 본 발명은 수신된 신호를 지연시켜 계수값들을 곱한 후 곱한 값들을 모두 더하여 출력하는 유한충격응답필터를 구비한다, 상기 유한충격응답필터에 초기계수값을 인가하는 초기계수계산부는 수신된 신호로부터 자기상관행렬을 구하고, 상기 행렬과 초기 고유벡터를 이용하여 새로운 고유벡터를 계산할 때 레빈슨-더빈알고리즘을 사용하여 계산량을 줄이며, 계산된 고유벡터를 이전값으로 치환하여 새로운 고유벡터를 계산하는 과정을 반복하여 최종계산된 고유벡터를 초기계수값으로 설정하게 된다. 이때 통신채널은 그 특성이 급격하게 변하지 않고, 수신신호의 자기상관행렬은 허미션 토플리츠한 특성을 갖는다는 일반적인 채널특성을 이용하여 등화기를 초기화하는데 걸리는 시간과 계산량을 줄일 수 있다.The present invention relates to a magnetic recovery equalizer using spectral prediction and a method of initializing the equalizer using a simplified method of spectral prediction when initializing coefficients of the magnetic recovery equalizer. The present invention includes a finite shock response filter for delaying a received signal, multiplying the coefficient values, and adding all the multiplied values. The initial coefficient calculation unit for applying an initial coefficient value to the finite shock response filter receives the received coefficient from the received signal. The process of calculating a new eigenvector by calculating the autocorrelation matrix, reducing the amount of computation using the Levinson-Dubin algorithm, and calculating the new eigenvector by calculating the new eigenvector using the matrix and the initial eigenvector Repeatedly, the final calculated eigenvector is set as an initial coefficient value. At this time, the communication channel does not change rapidly and the time required for initializing the equalizer can be reduced by using the general channel characteristic that the autocorrelation matrix of the received signal has a hermit topless characteristic.

Description

스펙트럼 예측을 이용한 자력복구등화기 및 그의 초기화방법Magnetic Recovery Equalizer Using Spectral Prediction and Its Initialization Method

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

제1도는 본 발명의 스펙트럼 예측을 이용한 자력복구등화기의 구성도.1 is a block diagram of a magnetic recovery equalizer using the spectral prediction of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 유한충격응답필터 20 : 초기계수계산부10: finite impact response filter 20: initial coefficient calculation unit

30 : 등화계수계산부 T1-Tn : 지연소자30: equalization coefficient calculation unit T1-Tn: delay element

M0-Mn : 곱셈기 A1-An : 가산기M0-Mn: Multiplier A1-An: Adder

Claims (7)

통신채널을 통해 수신된 신호의 왜곡과 간섭을 보상하는 자력복구등화기에 있어서, 수신된 신호로부터 자기상관행렬을 구하는 단계와; 임의의 초기 고유벡터를 정하는 단계와; 상기 자기상관행렬과 초기 고유벡터를 이용하여 레빈슨-더빈알고리즘에 의해 새로운 고유벡터를 계산하는 단계와; 상기 새로운 고유벡터를 이전의 고유벡터로 치환하여 다시 새로운 고유벡터를 계산하고 이 과정을 소정 횟수만큼 반복하는 단계와; 최종적으로 계산된 고유벡터를 자력복구등화기의 초기계수로 설정하는 단계를 포함하는 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기의 초기화방법.A self recovery equalizer for compensating for distortion and interference of a signal received through a communication channel, comprising: obtaining an autocorrelation matrix from a received signal; Determining any initial eigenvectors; Calculating a new eigenvector by the Levinson-Dervin algorithm using the autocorrelation matrix and the initial eigenvector; Replacing the new eigenvector with a previous eigenvector to calculate a new eigenvector and repeating this process a predetermined number of times; And setting the final calculated eigenvector as an initial coefficient of the magnetic recovery equalizer. 제1항에 있어서, 상기 통신채널은 그 특성이 급격하게 변하지 않는 랜덤프로세서인 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기의 초기화방법.2. The method of claim 1, wherein the communication channel is a random processor whose characteristics do not change drastically. 제2항에 있어서, 상관관계가 없는 신호열들이 통신채널을 통과하여 수신된 신호의 자기상관행렬은 가장 긴 대각선을 중심으로 대칭한 형태인 허미션 토플리츠한 특성을 갖는 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기의 초기화방법.The spectral prediction of claim 2, wherein the autocorrelation matrix of a signal received through uncorrelated signal strings through a communication channel has a helical topless characteristic that is symmetrical about a longest diagonal line. Initialization method of magnetic recovery equalizer using. 제3항에 있어서, 상기 자기상관행렬(R)은 아래식에 의해 구하도록 한 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기의 초기화방법.4. The method of claim 3, wherein the autocorrelation matrix (R) is obtained by the following equation. 여기서, E[ ]는 앙상블평균을 나타내고, C는 수신신호의 벡터이며, *는 복소공액이고, T는 전치값을 나타낸다.Where E [] represents the ensemble mean, C is the vector of the received signal, * is the complex conjugate, and T represents the transpose value. 제4항에 있어서, 상기 새로운 고유벡터[V(k+1)]는 아래의 함수를 풀어 계산하도록 한 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기의 초기화방법.5. The method of claim 4, wherein the new eigenvector [V (k + 1)] is calculated by solving the following function. 여기서, V(k)는 이전의 고유벡터이다.Where V (k) is the previous eigenvector. 제5항에 있어서, 상기 고유벡터의 행렬차수는 자력복구등화기의 계수갯수와 같게 설정하도록 한 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기의 초기화방법.6. The method of claim 5, wherein the matrix order of the eigenvectors is set equal to the number of coefficients of the magnetic recovery equalizer. 채널특성이 급격하게 변하지 않는 통신채널을 통해 수신된 신호의 왜곡과 간섭을 보상하는 자력복구등화기에 있어서, 서로 직렬연결되어 상기 수신된 신호를 소정시간간격으로 지연시키는 다수개의 지연소자와; 상기 수신 및 지연된 신호에 채널특성에 맞게 계산된 계수값들을 계속적으로 곱하는 다수개의 곱셈기와; 상기 곱셈기의 출력신호들을 모두 더하여 입력 데이타와 그 과거값들이 선형결합된 형태의 신호를 출력하는 다수개의 가산기와; 수신된 신호의 자기상관행렬을 계산한 후 상기 행렬의 최소 고유값에 해당하는 고유벡터를 레빈슨-더빈알고리즘을 이용해 계산하여 이 값을 초기계수값으로서 상기 곱셈기로 출력하는 초기계수계산부와; 상기 가산기의 출력신호를 입력받아 등화알고리즘을 이용해 계수값을 계산하고 상기 계수값을 계속 재조정하여 곱셈기로 출력하는 등화계수계산부를 포함하는 것을 특징으로 하는 스펙트럼 예측을 이용한 자력복구등화기.A magnetic recovery equalizer for compensating for distortion and interference of a signal received through a communication channel whose channel characteristics do not change drastically, comprising: a plurality of delay elements connected in series with each other to delay the received signals at predetermined time intervals; A plurality of multipliers for continuously multiplying the received and delayed signals with coefficient values calculated according to channel characteristics; A plurality of adders for adding all of the output signals of the multiplier to output a signal having a linear combination of input data and past values thereof; An initial coefficient calculator for calculating an autocorrelation matrix of the received signal and calculating an eigenvector corresponding to the minimum eigenvalue of the matrix using a Levinson-Derbin algorithm and outputting this value to the multiplier as an initial coefficient value; And an equalization coefficient calculator which receives an output signal of the adder, calculates a coefficient value using an equalization algorithm, and continuously readjusts the coefficient value and outputs it to a multiplier. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930025128A 1993-11-24 1993-11-24 Self-recovering equalizer and initializing method thereof by spectrum prediction KR0152028B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100299767B1 (en) * 1999-04-20 2001-10-29 김춘호 Channel shortening equalizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100299767B1 (en) * 1999-04-20 2001-10-29 김춘호 Channel shortening equalizer

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