关键词: 捷变频；直达波；参数提取；电子侦察

Abstract:

A fast method for parameter estimation of the directpath signals is presented for a frequency agile radar. The pulse width (PW) is roughly estimated based on the method for the detection of frequency domain, and the accurate PW parameter is estimated by matching the PW template. Then, the accurate bandwidth (BW) is estimated and the carrier frequency (CF) is roughly estimated based on the dechirp method. The Accurate CF is estimated by matching the CF template. Finally, the proposed parameter extraction algorithm is implemented on the FPGA hardware system. The test results of real data show that this method enjoys good accuracy and computational efficiency. It has been successfully applied to an electronic surveillance system.

Key words: frequency agile, direct path signal, parameter extraction, electronic surveillance