基于稀疏频率估计的空间DOA估计算法
首发时间:2011-02-24
摘要:传统波达方向估计要求阵元间距满足一定条件,阵元稀布的条件下的波达方向估计是个新颖而又重要的问题。本文研究了一种基于稀疏频率估计的阵列DOA估计方法。将线性阵列的DOA估计问题转变为类似于频率估计问题。选择中国余数定理作为稀疏频率估计的方法,中国余数定理即孙子定理应用的一个重要问题是余数有误差时导致的数值估计误差。本文研究了稳健的中国余数定理算法,并通过建模应用到欠采样的DOA估计问题。通过仿真实验,初步验证了其可行性,并评估了其性能。
关键词: 信号处理 阵列信号处理 波达方向估计 稀疏频率 中国余数定理
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DOA algorithm based on sparse frequency estimation
Abstract:Tratidional estimation of direction of arrival (DOA) require sensor space to meet a specific condition. So direction of arrival problem in the conditon of sensor sparse location is a new and important problem. In this paper, an algorithm for direction of arrival is developed by sparse frequency estimation. The DOA problem are resolved by regarding it as a frequency estimation problem. As one of methods to estimate the frequency of spare signals in frequency domain, the Chinese remaider theorm (CRT) is chosen for DOA estimation. The estimation error caused by remaider error is important problem we must pay attention to when the CRT as Sunzi Theorem is applied. The paper studied the robust CRT algorithm and use it in the DOA problem of spase space sampling. The simulation results showed its feasibility and evaluate the performance.
Keywords: array signal processing direction of arrival sparse frequency chinese reamainder theorm
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No.4409586568169129****
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