数字信道化技术在空时联合阵列信号处理中的应用

Application of Digital Channelization Ttechnology to Space-time Association Array Signal Processing

低信噪比下的高精度的参数估计和实时处理是电子战阵列信号处理中的难点。传统的估计方法只能适应高信噪比或长快拍环境。将数字信道化与空间谱算法相结合,给出了一种基于数字信道化技术的测频与测向的实时处理方案,并提出了一种测频与测向级联估计算法。仿真实验表明该算法在-10dB的噪声环境下可以进行高精度的参数估计,且实时性得到了很大的提高。

The accurate parameter estimation and real-time processing in the environment of low signal-noise-ratio（SNR） are the difficult problems in electronic warfare array signal processing. The traditional estimation methods can be only effectively used in the environment of high SNR or long snap. This paper combines the digital cnannelization technology with the space spectrum algo- rithm,presents a kind of real-time processing scheme of frequency measurement and direction find- ing based on the digital channelization technology,and puts forward a kind of cascade estimation algorithm of frequency measurement and direction finding. The simulative test results show that the algorithm can performs the parameter estimation with high accuracy in -10 dB noise environment, and the computing speed is improved greatly.