BOC及其衍生信号通用无模糊捕获分析

For the problem of general unambiguous acquisition for BOC (binary offset carrier) and its derivative signals is still scarce of analysis, the paper proposed an improved unambiguous acquisition method based on PCF (pseudo correlation function) . Firstly, the paper proposed the concept of step-shape bits vector to obtain a unified expression of cross-correlation function and designed two new step-shape vectors, then synthesized the received signal and referenced signal of corresponding to shape code vector to obtain a single peak. Finally, the paper obtained a generalized unambiguous acquisition method by combined the single peak and autocorrelation functions. The experimental results show that, under the same conditions, its peak energy of the main peak increases by 23% than sub carrier phase cancellation method, the new propose method can deal with all kinds of BOC signals including complex ones with different types or orders and completely eliminate the ambiguity of the autocorrelation function in the synchronization process.