Patent ID: 8130145

Claim:
A method, comprising: receiving one or more satellite positioning system (SPS) signals at two or more physically separated antennae of a mobile station, said two or more antennae to provide a respective two or more radio frequency signals to a receiver of the mobile station; downconverting one or more of said radio frequency signals in one or more respective paths of a front end of the receiver to generate two or more complex digital signals comprising in-phase and quadrature components; and processing the two or more complex digital signals by combining the two or more complex digital signals to generate a combined digital signal according to a coherent combining algorithm, the processing being performed at least in part to improve one or more performance metrics related to position estimation operations, wherein said coherent combining algorithm comprises: despreading and rotating the two or more complex digital signals, respectively; coherently accumulating the results of the despreading and rotating operations for the two or more complex digital signals, respectively; estimating one or more phase differences among the two or more complex digital signals; and phase aligning said results of said coherent accumulation.