Multi-correlation strategies fusion acquisition method for high data rate global navigation satellite system signals

With the increasing use of high data rate navigation signals, the detection performance is severely affected by sign transition. An acquisition method based on multiple correlation strategies fusion (MCSF) has been proposed to reduce the correlation loss caused by the sign transition. The detection performances of non-coherent (NCH) method, zero-padding (ZP) method and MCSF in the presence of sign transition have been analysed. The theoretical and simulation results show that the proposed method can provide 1-3 dB acquisition sensitivity improvement compared with the NCH and ZP methods, and reduce the mean acquisition time by 21.3 and 8.5%, respectively. Moreover, the real data from GPS L5 and BeiDou Navigation Satellite System B2I have been used to analyse the performance.