一种双伪码MSK扩频同步方案的设计

摘要

This paper proposed one kind of synchronization design of double-PN MSK-DSSS system which used for burst communication in high dynamic circumstance.The design used a parallel 2 domain differential-peak search scheme and one-rank FLL assists two-rank PLL to achieve the synchronization of a DSSS signal.An approach of digital realization was also given.The design could realize rapid synchronization of a DSSS system in condition of increasing acceptable resource of FPGA.%提出了一种采用全并行二维搜索和差分峰值判决算法实现伪码的快速捕获、采用一阶锁频辅助二阶锁相实现载波跟踪的猝发式、高动态双伪随机码MSK直接序列扩频通信的同步方案,给出了便于数字化实现的算法结构.测试表明本方案在有限增加FPGA资源的情况下可以实现低信噪比、大载波频偏下扩频信号的快速捕获.