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利用回波互谱进行方位估计的两种方法研究
引用本文:李霞,李志舜. 利用回波互谱进行方位估计的两种方法研究[J]. 船舶工程, 2002, 0(3): 55-57
作者姓名:李霞  李志舜
作者单位:西北工业大学航海工程学院[710072];西北工业大学航海工程学院[710072]
摘    要:从两阵元回波互谱中存在一定的方位关系出发,介绍了傅立叶互谱和小波互谱的概念,并以两阵元模型为基础,采用有色高斯噪声背景下的矩阵单频信号,利用两种互谱分别作了方位估计,最后给出仿真结果。

关 键 词:小波变换  小波互谱  傅立叶互谱  方位估计  信噪比

Two Methods of DOA Estmation Based on Echo Mutual-spectra
by Li Xia and Li Zhishun. Two Methods of DOA Estmation Based on Echo Mutual-spectra[J]. Ship Engineering, 2002, 0(3): 55-57
Authors:by Li Xia and Li Zhishun
Affiliation:by Li Xia and Li Zhishun
Abstract:Estimation of DOA is an important problem in military and civilian fields.In this article,the authors discuss two methods of DOA estimation,using mutual-spectra between two received echoes.At first,they introduce in detail the two mutual-spectra theories of two-channel FFT and WT respectively,then they present simulation conducted on computer.Here they utilize the two-array model shown in fig.1.The wavelet function chosen in the article is Morlet wavelet,which is shown in Fig.3.fig.5 gives the results obtained by the two methods under SNR-0.At last,they show the simulation results under the different SNRs in table 1.The signal background is Gaussian color noise.Finally,they give a brief analysis.
Keywords:Wavelet transform FFT transform Mutual-spectra DOA estimaion SNR
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