多相滤波宽带信道化数字接收机

Polyphase Filtering Wide-Band Channelized Digital Receiver

宽带雷达电子战数字接收机是当前国内外研究的重点,信道化接收机能够处理同时到达的多个信号并有较高的截获概率。多相滤波信道化接收机运算量小且易于实现。为克服因D倍抽取而产生的多相滤波信道化数字接收机的接收盲区,引入了重叠一半的多相滤波信道化数字接收机。利用瞬时自相关接收机,可在消除信道化接收机虚假输出的同时提高信道化接收机的测频精度。文中给出了上述数字接收机的实现方法,并通过仿真实验证明了以上结论的有效性。

At present wideband radar EW reconnaissance digital receiver is a key research point. This kind of receiver can process simultaneously arrival multiple-signals and has high acquisition probability. The real-time processing can be achieved by ployphase filtering channelized receiver because of its low operation amount. In order to eliminate receiving dead zoon, the half overlap ployphase filtering channelized receivers are presented. The false outputs can be eliminated and frequency-measurement accuracy can be highly improved by using instant autocorrelation digital receiver. The realizations of above receivers are given; and the conclusion are proved by simulation experiment.