Broadband Cross-channel Signal Identification And Processing With FPGA

The electromagnetic environment is becoming more and more complicated in modernbattlefields, with the accumulation of a variety of communications, radar and high-density interferingsignals, which requires Electronic Warfare (EW) Receivers have covered large instantaneousbandwidth, high sensitivity and dynamic range, capable of handling multiple signals and real-timecharacteristics. Digital channelized receiver is the most widely used type of EW Receivers.In this article, a Theme of the cross-channel broadband signal reception is studied in the digitalchannelized system based on polyphase filter bank. The paper briefly introduces the waveform andcharacteristics parameters of the broadband signals of LFM and BPSK at first. Then the digitalchannelized technology with complex signal inputs has been talked, the general architecture and themathematical model is derived and simulated which the input polyphase filtering algorithm fornon-blind high probability of receiving. A brief analysis of rabbit ears causes and effects of thereceiver, focusing on the design of the complex prototype filter, the instantaneous dynamic range andthe linkages between the two.the cross-channel broadband signal reception and processing is highlighted in the paper on thechannelized systems based on LFM and BPSK signals, with the principle of FPGA hardwareimplementation. The algorithms involve, the pulse amplitude detection, eliminating false signals, theinstantaneous frequency measurement based on the average of the phase estimation, as well asbroadband signal reception across the channel signal reconstruction. And with comparison ofnumbers of exist reconstruction algorithms，an integrated approach is selected, simulation resultsprove the approach reliable.At the end of the paper, a project of FPGA hardware implementation is proposed and Somedetails and hardware simulation are given. Thus, the solution of the broadband digital channelizedreceiver is provided. This solution has some value in engineering.