An Improved Interference Suppression Algorithm Based on Regular WPT in the DSSS Satellite Communication System
Direct Sequence Spread Spectrum (DSSS), which is a typical spread spectrum technology with the characteristic of anti-jam, is widely used in satellite communication systems. Nevertheless, its processing gain is always limited because there are some restrictions on bandwidth and techniques in a practical system. When the interference is over threshold, it will lead to performance degradation Transform domain processing technology does improve the system's antiinterference ability. Fourier transform possesses a certain analyzing ability in the time and frequency domain, and wavelet packet transform has a better one. Both of their results of signal processing are not satisfied due to the limited capability of the interference detection and suppression. Through comparing and summarizing the traditional algorithm, a novel interference suppression algorithm which combines wavelet packet transform with Fourier transform is put forward in this paper. Simulation results reveal that the proposed interference suppression algorithm significantly improves the anti-jamming capability the DSSS satellite communication system