Real-time parameter extraction of the frequency agile PAR based on FPGA
According to the characteristic of a frequency agile radar, a fast method for parameter estimation of the direct-path signals is presented in this paper. In this method, the pulse width (PW) is roughly estimated based on the method in the frequency domain, and accurate PW parameter is estimated by matching the PW template. Second, accurate bandwidth (BW) is estimated and carrier frequency (CF) is roughly estimated based on de-chirp. Accurate CF is estimated by matching the CF template. Finally, parameter extraction algorithm of the paper is implemented on the FPGA hardware system. The test results of real data show that this method is highly accurate and computationally efficient. It has been successfully applied to an electronic reconnaissance system.