CAJ | 학술논문

为了提高基于矢量线列阵的目标方位估计能力，将基于时域解析信号实现最小方差无畸变响应（ MVDR）的方法——TAMVDR算法引入到了矢量线列阵信号处理中，提出了实现矢量线列阵波束形成的VTAMVDR算法。理论分析了矢量线列阵VTAMVDR算法的原理，该算法通过Hilbert变换对时域宽带信号引入复权向量，不需要进行子带分割，且不需要对数据进行分块处理，获得稳定优化权向量估计所需要的数据长度远小于频域MVDR方法，数据长度合适时，单次快拍即可实现波束形成，大大降低了运算量。仿真和海上试验数据分析结果表明：VTMVDR算法相比于频域MVDR算法具有较好的性能，具有更高的分辨率和更窄的波束角，有更好的探测性能。
위료제고기우시량선렬진적목표방위고계능력，장기우시역해석신호실현최소방차무기변향응（ MVDR）적방법——TAMVDR산법인입도료시량선렬진신호처리중，제출료실현시량선렬진파속형성적VTAMVDR산법。이론분석료시량선렬진VTAMVDR산법적원리，해산법통과Hilbert변환대시역관대신호인입복권향량，불수요진행자대분할，차불수요대수거진행분괴처리，획득은정우화권향량고계소수요적수거장도원소우빈역MVDR방법，수거장도합괄시，단차쾌박즉가실현파속형성，대대강저료운산량。방진화해상시험수거분석결과표명：VTMVDR산법상비우빈역MVDR산법구유교호적성능，구유경고적분변솔화경착적파속각，유경호적탐측성능。
To improve performance of acoustic vector sensors for direction-of-arrival( DOA)estimation,a new algorithm based on TAMVDR is used in vector line array signal processing,called VTAMVDR. The principle of VTAMVDR is analyzed theoretically. In the model,complex-weighted vector is introduced to time-domain wideband signals through Hilbert transformation. Thus,the narrow-band division and blocking process are avoided, and the data length required to obtain stable optimum weighted vector is far less shorter than frequency-domain MVDR method. The result of simulation and sea trial data analysis result show that,compared with frequency-domain MVDR method,VTMVDR algorithm has better performance,with higher resolution and narrower beam angle,and has better performance of detection.