Aiming at the ambiguity problem in the acquisition process of BOC(binary offset carrier)modulated signal,an unambiguous acquisition algorithm of BOC(m,n)signal based on auto-correlation addition and subtraction complementary is proposed.According to the characteristics of subcarrier pulse periodic extension,the purpose of separating the autocorrelation function is achieved by splitting the subcarriers.The first and last sub-correlation functions with respect to code phase symmetry are added and subtracted to calculate the difference,and finally the side peaks are completely eliminated by modulo summation operation.The theoretical and simulation results show that the algorithm has good adaptability,is suitable for BOC modulation signals with arbitrary order,and can completely eliminate side peaks while retaining the narrow correlation peak characteristics.Compared with SCPC,ASPeCT and BPSK-Like three traditional BOC signal unambiguous acquisition algorithms,the proposed algorithm has an increase in SNR performance of about 1.5～4.5 dBHz.
关键词
二进制偏移载波调制/信号捕获/自相关函数/无模糊度/分离重构
Key words
binary offset carrier modulation/signal acquisition/auto-correlation function/unambiguous/separation and recon-struction
维普
万方数据