克服AltBOC信号复杂多峰的同步接收算法

摘要

To meet the high quality communication needs,the AltBOC modulation mechanism is proposed.However,due to the characteristics of complex multi-peaks for AltBOC signal,the problem of main peak estimation difficulty is caused in signal synchronization.Thus,according to the characteristics of AltBOC signal,the local co-direction and orthogonal correlation functions are constructed.And then through the leading and lagging processing of correlation function,an auxiliary correlation reconstruction algorithm is established,which to recovery the main peak,and overcome the side peaks.Simulation results demonstrate that Auxiliary Correlation Reconstruction (ACR) algorithm can recovery the main peak,and it can adapt to lower Signal to Noise Ratio(SNR) requirements.Meanwhile,ACR algorithm is better than BPSK-like algorithm,SCPC algorithm and Filtered algorithm in main peak detection and side peaks inhibition.%为应对高质量通信需求,出现了交替二进制偏移载波(AltBOC)调制机制,然而AltBOC信号具有的相关复杂多峰特性,引发了信号同步接收中主峰估计困难的问题.为此,针对AltBOC信号特性,构造本地同向及正交相关函数,进而通过相关函数的超前及滞后处理,建立辅助相关重构(ACR)算法,以达到恢复主峰,克服副峰影响的目的.仿真结果表明,该算法可以恢复相关函数的主峰,验证了ACR算法能适应更低的信噪比要求,主峰检测能力及对副峰的克服能力明显优于BPSK-like,SCPC,Filtered算法.