A mobile station comprising: a first receiver adapted to receive information over terrestrial wireless links, said receiver being further adapted to receive acquisition assistance, AA, information; and a second receiver (300, 1412) adapted to receive two or more satellite positioning system, SPS, signals at an associated two or more carrier frequencies, the two or more SPS signals including a first SPS signal at a first carrier frequency and a second SPS signal at a second carrier frequency that is different from the first carrier frequency, the second receiver comprising: a common complex signal path to process said simultaneously received SPS signals, said complex signal path comprising a mixer adapted to generate in-phase and quadrature signal paths based, at least in part, on said received SPS signals and a common local oscillator frequency that is based, at least in part, on the first carrier frequency and the second carrier frequency; one or more analog to digital conversion, ADC, circuits (312, 314) adapted to provide sampled in-phase and quadrature components based, at least in part, on signals processed in said in-phase and quadrature signal paths; a complex downconversion circuit adapted to generate a plurality of downconverted in-phase and quadrature signal paths for baseband processing according to said two or more received SPS signals based, at least in part, on said sampled in-phase and quadrature components; and a baseband processor (318, 1408) to determine pseudorange measurements associated with said received SPS signals based, at least in part, on said downconverted signals and said AA information. a first receiver adapted to receive information over terrestrial wireless links, said receiver being further adapted to receive acquisition assistance, AA, information; and a second receiver (300, 1412) adapted to receive two or more satellite positioning system, SPS, signals at an associated two or more carrier frequencies, the two or more SPS signals including a first SPS signal at a first carrier frequency and a second SPS signal at a second carrier frequency that is different from the first carrier frequency, the second receiver comprising: a common complex signal path to process said simultaneously received SPS signals, said complex signal path comprising a mixer adapted to generate in-phase and quadrature signal paths based, at least in part, on said received SPS signals and a common local oscillator frequency that is based, at least in part, on the first carrier frequency and the second carrier frequency; one or more analog to digital conversion, ADC, circuits (312, 314) adapted to provide sampled in-phase and quadrature components based, at least in part, on signals processed in said in-phase and quadrature signal paths; a complex downconversion circuit adapted to generate a plurality of downconverted in-phase and quadrature signal paths for baseband processing according to said two or more received SPS signals based, at least in part, on said sampled in-phase and quadrature components; and a baseband processor (318, 1408) to determine pseudorange measurements associated with said received SPS signals based, at least in part, on said downconverted signals and said AA information. a common complex signal path to process said simultaneously received SPS signals, said complex signal path comprising a mixer adapted to generate in-phase and quadrature signal paths based, at least in part, on said received SPS signals and a common local oscillator frequency that is based, at least in part, on the first carrier frequency and the second carrier frequency; one or more analog to digital conversion, ADC, circuits (312, 314) adapted to provide sampled in-phase and quadrature components based, at least in part, on signals processed in said in-phase and quadrature signal paths; a complex downconversion circuit adapted to generate a plurality of downconverted in-phase and quadrature signal paths for baseband processing according to said two or more received SPS signals based, at least in part, on said sampled in-phase and quadrature components; and a baseband processor (318, 1408) to determine pseudorange measurements associated with said received SPS signals based, at least in part, on said downconverted signals and said AA information.