MWC离散压缩采样宽带数字接收机FPGA实现

Wideband digital receiver FPGA implementation based on MWC discrete compressed sampling

针对当下在电子战领域运用较为广泛的信道化数字接收机中出现的跨信道等问题,提出了利用调制宽带转换器(MWC)离散压缩采样的结构构建新型宽带数字接收机,可对宽带雷达信号进行有效的检测、识别、参数估计,并可利用FPGA进行实现。在基于压缩采样的MWC结构中,宽带雷达信号被接收机中的伪随机序列混频至各个子带内,每个子带均含有接收信号的全部信息,通过低通滤波器和降采样得到的基带信号同样包含了接收信号的全部信息,对基带信号进行处理不仅降低了数据量,而且有效地解决了信道化接收机中跨信道的问题。实验表明,该方法是正确而有效的。

In order to solve the cross-channel problems existing in the more widely used channelized digital receivers in the field of electronic warfare,a new wideband digital receiver is proposed based on modulated wideband converter（MWC） discrete compressed sampling structure to detect,identificate and estimate parameter of radar signal,and it can be implemented using FPGA. In a compressive sampled MWC architecture,a wideband radar signal is mixed into subbands by a pseudo-random sequence in the receiver,each subband containing all the information of the received signal,the baseband signal obtained by the low-pass filter and downsampling also contains all the information received signal. Processing the baseband signal not only reduces the amount of data,but also effectively solves the cross-channel problems in channelized receiver. The experiments show that this method is correct and effective.