摘要
研究了FH-OFDM系统的跳频同步方法和定时同步方法。跳频同步中利用GPS同步脉冲保证了接收机的时间基准。定时同步中使用了基于最小均方差的判决方法,对匹配滤波器进行了改进,有效地减少了载波频偏的干扰,并针对FPGA应用对算法进行了简化。对FH-OFDM同步系统进行了FPGA实现,性能测试结果表明该同步实现方法可以快速准确地检测到信号帧以及各个符号的起始位置。
Synchronization algorithms for timing and frequency hopping in FH-OFDM system are discussed. Sync pulse is exploited as timing reference in frequency hopping synchronization. Minimum mean square error（ MMSE）algorithm and improved matched filter are used for timing synchronization so that the frequency offset interference is reduced. Some simplification about algorithm is also performed. FH - OFDM synchronization system is implemented by FPGA. Performance test results show that the implementation of algorithm can detect the start of each frame and symbol accurately.
出处
《电视技术》
北大核心
2012年第9期33-36,共4页
Video Engineering
