摘要
本文在简化传感器阵列基础上,建立了基于循环互相关的阵列信号模型,并根据该模型,运用波达方向矩阵法提出了一种新的循环平稳源信号二维DOA估计方法,通过利用循环互相关函数建立信号处理模型,使得该方法在继承了一般循环平稳DOA估计方法所具有的优点之外,还具有更好的抑制噪声能力,同时,此方法不仅对窄带信号适用,对宽带信号也同样适用。此外,该方法不需谱峰搜索和二维角度参数配对,具有计算复杂度低的优点。理论分析和仿真结果均说明,本文方法具有较好的噪声抑制能力和信号选择能力。
Many man-made modulated signals exhibit cyclostationarity, corresponding to the underlying periodicity arising from carrier frequencies or baud rates. In this paper, we propose a new two-dimensional direction-of-arrival estimation algorithm using simpli- fied array configuration that exploits cyclostationarity in order to improve the direction-of-arrival estimation. The proposed method not only inherits the advantages of the cyclic DOA estimation methods in spatial spectral estimation, but also has better noises suppressing ability. This method can be applied to both wideband and narrowband cases without any two-dimensional search and that the two-dimensional parameters can be paired automatically. Theoretical analysis and computer simulation show simultaneously that this algorithm has better performance in noises suppressing and signal selectivity.
出处
《信号处理》
CSCD
北大核心
2009年第6期847-852,共6页
Journal of Signal Processing
基金
国家863基金项目(No.2007AA703428)
国家重点实验室基金项目(No.JC05-04-12)
关键词
阵列信号处理
二维波达方向
循环平稳
(共轭)循环互相关
array signal processing
two-dimensional DOA
cyclostationarity
（conjugate） cyclic cross-correlation
