Title :
Improved Interrupted Sampling Repeater Jamming based on DRFM
Author :
Li Chuan-zhong ; Su Wei-min ; Gu Hong ; Ma Chao ; Chen Jin-li
Author_Institution :
Sch. of Electron. & Opt. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
Interrupted Sampling Repeater Jamming (ISRJ) can be implemented easily based on Digital Radio Frequency Memory (DRFM) technique. An improved method is presented in this paper which has all advantages of traditional ISRJ. Furthermore, the improved ISRJ obtains a train of false targets that precede the true one. The radar radio signal is downshifted and sampled by receive-transmit time-sharing antenna and then stored to digital memory. Its retransmitting signal reserves the coherent property so that a large number of false targets will be achieved after matched filter of the pulse compression radar. The principal and quantitative relation between the false targets and the true one is deduced and analyzed. Simulation illustrates that the improved ISRJ method obtains several false targets ahead of the true one and the amplitude of the main false target decrease compared with the traditional method. The amplitude decrease can be remedied by enhancing the power of transmitting antenna. Imaging results with improved ISRJ method to real SAR raw are shown at last.
Keywords :
digital radio; jamming; pulse compression; radar signal processing; radio repeaters; receiving antennas; transmitting antennas; DRFM; ISRJ improvement; SAR; digital radio frequency memory technique; false targets; interrupted sampling repeater jamming improvement; matched filter; pulse compression radar; radar radio signal; receive-transmit time-sharing antenna; transmitting antenna power enhancement; Frequency modulation; Imaging; Jamming; Repeaters; Synthetic aperture radar; DRFM; frequency shifted; interrupted sampling repeater jamming;
Conference_Titel :
Signal Processing, Communications and Computing (ICSPCC), 2014 IEEE International Conference on
Conference_Location :
Guilin
Print_ISBN :
978-1-4799-5272-4
DOI :
10.1109/ICSPCC.2014.6986193