Coherent Multipath Signal Direction Finding with Array Shape Distortion
When the shape of a horizontal towed line array is deformed due to fluctuations in ship maneuvering, beamforming and Directions-of-Arrival (DOA) estimation would be critically degraded if the array shape was still assumed to be a straight line. An effective method was proposed to estimate the DOAs of the coherent multipath signals with the deformed towed array. Firstly, the spatial signature is blindly estimated from the eigen-decomposition of the data covariance matrix. Then, the problem of DOAs estimation could be described as a nonlinear multi-dimensional optimization problem and solved by the Genetic Algorithm, which dose not require the initial values of the parameters and can converge to the global point. The effectiveness of the proposed method was verified by numerical examples.
DOA estimation coherent multipath signal spatial signature array shape distortion
Jie Zhuo Bing Li
Institute of Acoustic Engineerin Northwestern Polytechnical University Xian, Shaanxi, 710072, P.R.C State Key Laboratory for Manufacturing System Xian Jiaotong University Xian, Shaanxi, 710049, P.R.
国际会议
2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)
北京
英文
295-298
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）