针对微波突发通信的扩频解扩同步问题,介绍了一种基于自适应门限的解扩技术,分析了同步序列的相关性,论述了基于自适应门限的算法,提出了解调器设计结构,给出了采用自适应门限算法的相关峰与门限的定量分析,以及在不同信噪比下的仿真曲线。该技术相比传统的扩频同步搜索性能有明显的改善,具有实时性强、门限自适应和同步稳定可靠等特点。%This paper introduces a de-spreading technology used at the synchronization of burst microwave communication. It analyzes the correlativity of synchronizing sequence, describes an algorithm based on adaptive threshold, and proposes the design of software architecture of demodulator. This paper presents the result of quantitative analysis for correlation peak and adaptive threshold, and the simulation curves on the different SNR for adaptive algorithm. Compared with the traditional de - spreading technology, this technology has such characteristics as improved performance of communication, robust real - time, adaptive threshold, stability and reliability.
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