Improved TOPS about Direction of Arrival Estimation for Wideband Signals
The study about the direction-of-arrival (DOA) estimation for wideband signals is a basic topic of Signal Processing. The method called test of orthogonality of projected subspaces (TOPS) does not require initial values to form focusing matrix compared with the coherent signal subspace method (CSSM), but it has poor performance for coherent wideband signals at low signal-to-noise ratio (SNR). Based on the lack of the conventional TOPS, this paper reconstructs a set of new matrices with the narrowband correlated matrices coming from the DFT decomposition of the array output and modifies the method frame of the conventional TOPS. So we get a set of reconstructed matrices with full rank corresponding to each frequency bin, and which have no array aperture loss. The improved TOPS can estimate the DOA for coherent wideband sources at low SNR, and enhances the performance of the conventional TOPS. Simulation results show that the improved TOPS is effective, and the total performance of which is similar to the rotat ional signal-subspace (RSS) method.
Array processing wideband sources direction of arrival (DOA)
Bin He
Changchun Institute of Optics, Fine Mechanics and Physics Chinese Academy of Sciences Changchun, China
国际会议
上海
英文
2051-2054
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）