Open AccessLong‐time coherent integration method for high‐speed target detection using frequency agile radar
Author(s) -
Wang Dinghe,
Lin Caiyong,
Bao Qinglong,
Chen Zengping
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.0821
Subject(s) - pulse compression , waveform , radar , narrowband , pulse repetition frequency , ranging , computer science , acoustics , electronic engineering , distortion (music) , time delay and integration , transmission (telecommunications) , matched filter , filter (signal processing) , optics , physics , bandwidth (computing) , engineering , telecommunications , amplifier , computer vision
In frequency agile radar (FAR), successive pulses each with different carrier frequencies are used as the transmission waveform. Since the range–Doppler coupling effect of a high‐speed target varies significantly with the carrier frequency, large ranging errors will exist between different pulses. In this case, great distortion of the moving trace in the echo plane will be present after conventional pulse compression. The distortion will defocus the echo energy in the integration process when combining multiple pulses. In addition, for high‐speed targets, the traditional narrowband matched filter will suffer from a decrease in signal‐to‐noise ratio, especially when pulses with large duration or bandwidths are used. A long‐time coherent integration method for the high‐speed target detection using FAR is proposed. The effectiveness is verified by simulation experiments.