MVDR Multi-Beam MVDR Technique for Removing Interference Signals in Array Antenna Based GPS Receivers

The present invention relates to a multi-beam minimum variance distortionless response (MVDR) processing method based on an array antenna, capable of preventing degradation of reception performance of a global positioning system (GPS) signal. According to the present invention, the multi-beam MVDR p...

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Bibliographische Detailangaben
Hauptverfasser: KIL, HAENG BOK, LEE, KWANG PYO, JEONG, EUI RIM
Format: Patent
Sprache:eng ; kor
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Zusammenfassung:The present invention relates to a multi-beam minimum variance distortionless response (MVDR) processing method based on an array antenna, capable of preventing degradation of reception performance of a global positioning system (GPS) signal. According to the present invention, the multi-beam MVDR processing method based on an array antenna comprises: a step (a) of assuming that power of a jammer is greater than that of noise in order to determine a beamforming vector (underlined w) of each of a plurality of antennas, so as to calculate power of a space-time filter output (r(n)) including a beamforming vector; a step (b) of calculating a plurality of independent constraints to set a beam in multiple directions; a step (c) of using the beamforming vector (underlined w) to convert each independent constraint into a single constraint; a step (d) of using a Lagrangian multiplier (λ) to calculate a beamforming vector (underlined wopt)for minimizing output power; a step (e) of using a function optimization method to calculate an algorithm for finding a time-space area filter coefficient; and a step (f) of inputting a current sample value instead of an autocorrelation matrix in the algorithm for calculating the time-space area filter coefficient to simply the algorithm. 본 발명은 본 발명 배열 안테나 기반의 다중 빔 MVDR 처리방법은, a) 다수의 안테나 각각의 빔포밍 벡터()를 결정하기 위하여 재머의 전력은 잡음보다 크다고 가정하여, 빔포밍 벡터가 포함된 공간-시간 필터 출력(r(n))의 전력을 구하는 단계와, b) 다수의 방향으로의 빔을 설정하는 복수의 독립적인 제약조건을 구하는 단계와, c) 각 독립적인 제약조건을 빔포밍 벡터()를 이용하여 단일한 제약조건으로 변환하는 단계와, d) 라그랑주 승수()를 이용하여 출력전력을 최소화하는 빔포밍 벡터(opt)를 산출하는 단계와, e) 함수 최적화 방법을 사용하여 공간-시간 영역 필터 계수를 찾는 알고리즘을 구하는 단계와, f)상기 공간-시간 영역 필터 계수를 찾는 알고리즘에 현재의 샘플 값을 자기상관 행렬을 대입하여 단순화하는 단계를 포함한다.