摘要
相干信号子空间方法(CSM)一直是宽带信号波达方位(DOA)估计的研究热点。首先建立了宽带阵列信号处理的模型,在此基础上,分析了宽带高分辨方位估计在不同聚焦矩阵下的几种CSM算法。进行了计算机仿真试验,在理论上分析和比较了各种方法的性能,验证了宽带DOA估计算法的有效性。仿真结果表明,CSM方法具有良好的分辨性能,在低信噪比的条件下仍具有一定的分辨能力,但是需要进行方向的预估。
Coherent signal-subspace method（CSM） had been the hot spots of wideband signal direction of arrival （DOA） estimation. First the model of broadband array signal was established. On the basis, analyze several CSM algorithms which use different focusing matrixes. Analyze and Compare the performance of a variety of methods in theory, also validate the effectiveness of wideband DOA estimation algorithms by computer simulations. The simulation results show that CSM has a good performance of resolution. Under the condition of low SNR, CSM still has a certain ability to distinguish signals, but it needs the forecast of signals position.
出处
《计算机技术与发展》
2009年第3期99-101,105,共4页
Computer Technology and Development
基金
河南省自然科学基金资助项目(0411010400)
