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基于一种并行组合直扩通信系统研究其抗噪性能，在考虑非线性处理（软限幅）和“ε－混合”噪声模型的前提下分析了单个直扩数字相关器的渐近相对效率（ＡＲＲ）．并由计算机模拟验证了这种理论分析的准确性。给出了该系统比特误码率（ＢＥＲ）的数值分析结果，表明软限幅对该系统的性能有较大影响，合理利用这种非线性处理可使系统性能得到改善。研究结果还表明，在一定条件下该系统与常规直扩通信系统相比具有相近的ＢＥＲ性能。
Based on a parallel combined DSSS communication system, its anti-noise performance is studied. The asymptotic relative efficiency of a single DSSS digital correlator is analyzed on the premise of nonlinear processing (soft clipping) and “ε-mixing” noise model ARR). The accuracy of this theoretical analysis is verified by computer simulation. The results of numerical analysis of the bit error rate (BER) of the system are given. The results show that the soft limit has a great influence on the performance of the system, and the rational use of this nonlinear process can improve the system performance. The results also show that under certain conditions, the system has similar BER performance compared with the conventional DSSS communication system.