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形单频信号 ,利用两种互谱分别作了方位估计 ,最后给出仿真结果。
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.
出处
《船舶工程》
CSCD
北大核心
2002年第3期55-57,共3页
Ship Engineering
