Offline implementation of subcarrier tracking technique for boc modulated signals in satellite navigation

Tracking of Binary Offset Carrier (BOC) signal is more challenging than Binary Phase Shift Keying (BPSK) signal, due to multiple peaks in autocorrelation function. Offline processing of the BOC signal is carried out using offline software receiver. In this work it is proposed to track subcarrier, code and carrier of BOC signal using only two loops Phase Lock Loop (PLL) and Delay Lock Loop (DLL) which reduces number of correlators as compared to double estimator, bump jumping and Astrium correlator method. The tracking performance of the proposed method is analysed using BOC (5,2) signals.