Direction of Arrival Estimation of Coherent Wideband LFM Signals in Multipath Environment

摘要：

A novel direction of arrival (DOA) estimation method is proposed for coherent wideband linear frequency modulated (LFM) signals in multipath environment. In this method, the wideband LFM signals are first transformed into fractional Fourier (FRF) domain to construct the array model, in which time-variant steering vector is changed into time-invariant one and wideband LFM signals are converted to narrowband stationary ones. Afterwards, the coherent wideband LFM signals are resolved separately by performing a Toeplitz decorrelation scheme on the covariance matrix...Then, the DOAs of coherent wideband LFM signals are estimated by the signal parameters via rotation invariance technique (ESPRIT). The proposed method can resolve more coherent wideband LFM signals without reducing the array aperture, and can obtain more accurate DOA estimation at low SNR with a low computation complexity. Simulation results demonstrate the effectiveness and efciency of the proposed method.

关键词： DOA estimation wideband LFM signals fractional Fourier transform (FRFT) Toeplitz decorrelation

作者: Yue Cui Kaihua Liu Junfeng Wang

作者单位: School of Electronics and Information Engineering, Tianjin University, Tianjin, China

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 58-61

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）