Design And Anti-jamming Capability Analysis Of A Two Dimensional Spread Spectrum System

The spread spectrum communication is the technology with strong capability of anti-jamming has been popularized all over the world. However, with the rapid development of modern communication technology, the traditional spread spectrum methods no longer meet the requirements of high-speed and strong anti-jamming capability in modern communication systems. In order to achieve high performance of spread spectrum technology, a new developed technical—two dimensional spread spectrum (2DSSS) is appeared.This thesis introduces some key technologies in the 2DSSS, including the direct sequence spread spectrum, the m sequence and the Gold sequence. Focusing on the direct sequence spread spectrum, a 2DSSS system is realized on the non-coding PSK modulation and the spread spectrum code which consists the m sequence and the Gold sequence. The performance of the PSK-2DSSS system is analyzed in noise jamming. On the basis of expounding the principle of the PSK-2DSSS, a system model of the PSK-2DSSS is designed and simulated by Systemview, the modules function of the system are also described in thesis. Analysis results of bit error rate (BER) are get by analyzing the BER performance of the PSK-2DSSS system under the condition of pulse jamming, single-tone jamming and narrow Gauss noise. Several specific methods which help to improve the anti-jamming capability of the system are put forward at last. The simulation results show that the design of the PSK-2DSSS system is feasible, and the system has a better anti-jamming capability.