The design of adaptive interference cancellation unit of pseudo-random code phase modulation fuze based on time-frequency analysis

Time-frequency analysis method is an effective method of identifying the narrow-band interference in the wide-band spread spectrum signal. A time-frequency analysis method of extended discrete-time Wigner-Ville distribution (EDTWD) was used to extract and reconstruct the narrow-band interference in the received signal of pseudo-random code phase modulation fuze. Then the interference was 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 algorithm theory and design process of the method was proposed, and the simulation result was offered.