周期序列DSSS系统抗CW干扰性能分析

he symbol decision variable in a direct sequence spread spectrum (DSSS) system with a periodic sequence under single tone continuous wave (CW) interference does not approach the standard Gaussian distribution, so the actual performance of DSSS system with a periodic sequence against CW interference is completely different from the analytic result resorted to the stand Gaussian approximation (SGA). It is difficult to express the performance in a simple way. The performance of DSSS system with a periodic sequence against CW interference is researched by theoretical analysis and numerical simulations in this paper, the results indicate that the interference component of the symbol decision variable in the periodic sequence DSSS system under CW interference takes on a constant level or a monochromatic fluctuation, the bit error performance is not only correlative with the interference-signal ratio (ISR), the frequency offset and phase of the CW interference sensitively, but also associated with the individual spread spectrum code sequence.