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阐述了SAW卷积器匹配滤波功能,提出了用卷积器实现某直接序列扩频PSK调制数传系统的快速码同步及解调的新方法。理论及实验结果表明,这种码捕获方式的平均捕获时间比多积分方式小两个数量级。数据解调直接在中频上完成,它不需要码精同步和载波同步,解调器原理简便,结构简单。
The matching filtering function of SAW convolver is described, and a new method of synchronizing and demodulating the fast code of a direct sequence spread spectrum (PSK) modulated data system using a convolver is proposed. The theoretical and experimental results show that the average acquisition time of this code acquisition method is two orders of magnitude smaller than the multi-integration method. Data demodulation directly on the IF to complete, it does not require code synchronization and carrier synchronization, demodulator principle is simple, simple structure.