CAJ | 학술논문

导向矢量的频率不一致性不利于宽带信号的DOA估计。为此，首先提出宽带直接空间谱估计算法，但是其限制条件过于苛刻；然后利用宽带信号的时延性质对阵列进行扩展，提出一种新的宽带DOA估计算法，新算法不需要DOA预估计；最后分析了梳妆谱和连续谱两种情形下如何使用新算法的问题。仿真实验结果表明，在信噪比较高的条件下，与传统算法相比，新算法的估计成功率更高，估计误差更小。
도향시량적빈솔불일치성불리우관대신호적DOA고계。위차，수선제출관대직접공간보고계산법，단시기한제조건과우가각；연후이용관대신호적시연성질대진렬진행확전，제출일충신적관대DOA고계산법，신산법불수요DOA예고계；최후분석료소장보화련속보량충정형하여하사용신산법적문제。방진실험결과표명，재신조비교고적조건하，여전통산법상비，신산법적고계성공솔경고，고계오차경소。
Because the steering vectors are different in different frequency,it is difficult to estimate the direction-of-arrival (DOA)of wideband signal.To settle this problem,firstly,this paper proposed a direct spatial spectrum estimation algorithm of wideband signal,the restrictive condition of which was extremely strict.Then,using the delay property of wideband signal,it ex-tended the array to propose a new wideband DOA estimation algorithm.The new algorithm did not need to pre-estimate DOAs. Finally,it analyzed how to use the new algorithm under the two frequency spectrum conditions of continuous spectrum and comb spectrum.The results of simulation experiments show that the new algorithm has higher probability of success and smaller esti-mation error than the traditional algorithms when the signal-to-noise ratio (SNR)is high.