Code phase discrimination function shaping method for Compass B1C QMBOC (6,1,4/33) signal

AbstractSummaryThe discrimination function shaping method has been proposed to improve the anti‐multipath performance for a global navigation satellite system receiver. However, the existing methods fail to fully exploit the potential anti‐multipath performance of multiplexed binary offset carrier (MBOC)–modulated signals. In this paper, a code phase discrimination function shaping method is proposed for a Compass B1C quadrature MBOC‐modulated signal. The in‐phase binary offset carrier (BOC) (1,1) signal and quadrature‐phase BOC (6,1) signal replicas are designed according to the least squares estimation. Then a shifted cross‐correlation function (CCF) between the in‐phase BOC (1,1) signal and its pseudorandom noise code is multiplied with the obtained CCFs to ensure an unambiguous tracking. Finally, a discrimination function with a small pull‐in range can be obtained by a weighed combination of the in‐phase and quadrature‐phase CCFs. A computer simulation is conducted to assess the performances under multipath and thermal noise conditions.In order to further exploit the potential of the anti‐multipath performance of the Compass B1C quadrature multiplexed binary offset carrier (QMBOC) modulation, the in‐phase BOC(1,1) signal and quadrature‐phase BOC(6,1) signal replicas are designed according to the least squares estimation. A discrimination function with a small pull‐in range can be obtained by a weighed combination of the in‐phase and quadrature‐phase cross‐correlation function (CCF). View Figure