Research on Interference Suppression of Pseudo-random Code Phase Modulation Fuse Based on EDTWD Analysis method

摘要

The anti-jamming ability of pseudo-random code phase modulation fuse is very strong. But the effectiveness of suppressing narrow-band interference is limited by the signal bandwidth. Thus, an effective method is developed to identify the narrow-band interference in the wide-band spread spectrum signal. Extended discrete-time Wigner-Ville distribution (EDTWD) analysis method is adopted to extract and reconstruct the narrow-band interference in the received signal of pseudo-random code phase modulation fuse. Then the interference is cancelled by the adaptive interference cancellation. The method doesn't require any prior knowledge of interference signal, makes the received signal distorted little and can also be used in the circumstance of some interference sources. The simulation result showed that the interference signal after being separated and then synthesized had the similar frequency characteristics as before.