Abstract:

The smeared spectrum (SMSP) jamming is a new dense multiple false targets jamming which aims specially at linear frequency modulation pulse compression radar. An SMSP jamming suppression method is proposed according to the periodic characteristic of the SMSP jamming. Firstly, the sub-pulse’s number and the frequency rate of the jamming signal are estimated by using the singular value radio (SVR) spectrum, and the pulse leading edge, amplitude and phase of the jamming signal are estimated by using the correlation operation. Then the jamming signal can be reconstructed. Secondly, the jamming signal is suppressed by subtracting it from the received signals. Finally, the simulation results indicate that the jamming suppression ratio can reach at least 20 dB even under low jamming to signal ratio (JSR) and jamming to noise ratio (JNR), which makes clear that the proposed method can suppress the SMSP jamming effectively.