Data/pilot combination strategies for Compass B1C signal acquisition

作者：Wang, Yiwei; Li, Wengang^*; Qian, Tianrong; Huang, Chen

来源：International Journal of Satellite Communications and Networking, 2019, 37(3): 253-268.

DOI：10.1002/sat.1281

• acquisition
• Compass
• data
• pilot combining
• global navigation satellite system
• maximum signal-to-noise ratio
• quadrature multiplexed binary offset carrier

The new Compass B1C signal, with a power ratio of the data channel to the pilot channel of 1:3, adopts BOC(1,1) in its data channel; a new modulation, namely, a quadrature multiplexed binary offset carrier (QMBOC) in its pilot channel modulates the narrowband BOC(1,1) and the wideband BOC(6,1) components in phase quadrature with each other. To fully exploit the B1C signal and to improve the acquisition sensitivity in a degraded signal or an indoor environment, this paper proposes to combine the data and the pilot channels for B1C signal acquisition. The noncoherent, coherent, and differential coherent strategies are considered for application in the B1C signal. Considering the power inequality between the data and the pilot channels, the maximum signal-to-noise ratio combination (MRC) is utilized in these strategies to obtain an optimal combination. This paper also proposes to simplify the differential coherent strategy to obtain a better anti-noise performance under stable conditions. The computer simulation results are given to verify the theoretical expressions, and some discussions with respect to the proposed strategies are provided.

• 出版日期2019-6
• 单位西安电子科技大学