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本文是FH/DS混合式扩频通信系统多址干扰性能分析的第二篇,主要针对DBPSK(Differentially Binary phase-shift keying)调制。对具有相同跳频图案,不同直扩码地址的情况,采用高斯近似法对系统多址干扰性能进行分析,得出了系统在多址干扰和白高斯噪声条件下的误码率表达式。当采用直扩码型为理想随机二进序列时,获得了简单明晰的表达式,并与BPSK调制的同一系统作了比较。
This article is the second in the analysis of multiple access interference performance of FH / DS hybrid spread spectrum communication system, mainly for DBPSK (Differentially Binary phase-shift keying) modulation. For the case of the same frequency hopping pattern and different DS code addresses, Gaussian approximation method is used to analyze the system multiple access interference performance, and the BER expression of the system under multi-access interference and white Gaussian noise condition is obtained. When using the DS code type as an ideal random binary sequence, a simple and clear expression is obtained and compared with the same system of BPSK modulation.