Wideband Radar Channel Signal Processing

Wideband Array Radar(WAR)is a fully digitized wideband array radar in which digital beamforming technique is used in transmitting and receiving.It has so many features such as flexible beam direction,multibeam easily come true,strong anti-interference ability,high resolution and adapting to complex electromagnetic environment.On the other hand the advantages of wideband array radar are based on radar channel signal processing including wideband digital down conversion and channel equalization.performance of Wideband digital down directly affect the speed of whole signal processing system and performance of channel equalization affect the performance of array radar.For wideband digital down conversion,this thesis focus on the application of distributed algorithm in FIR filter,point out that traditional distributed algorithm led to unconsistency of data rate.Usage of paralled distributed algorithm consume too much FPGA resource.For distributed algorithm,this thesis propose an improved FPGA implementation.Rebuilding ROM and offering multiple sets of address and data lines and processor can read data from outside independently.The method reduce the occupation of FPGA resource.Finally the thesis give out the FPGA implementation of wideband digital down conversion.For channel equalization,this thesis focus on FPGA implementation of wideband channel equalization,point out that it is difficult to renew equalization rate which is computed by MATLAB,and it cost more to compute equalization rate by DSP.This thesis propose a FPGA implementation which compute equalization rate by HLS.The implementation compute the rate by FPGA completely.Finally the thesis give out the FPGA implementation of wideband channel equalization based on the proposed method.