| 摘要 |
<p>A method for demodulating alternate binary offset carrier signals comprising at least two subcarriers (E5a, E5b) each having an in-phase and a quadrature component modulated by pseudo-random codes, the quadrature components (E5aQ, E5bQ) being modulated by dataless pilot signals, the in-phase components (E5al, E5bl) being modulated by data signals, said method comprising steps of: converting the alternate binary offset carrier signals into an intermediate frequency; band-pass filtering the converted signals and sampling the filtered signals; generating a carrier phase and carrier phase-rotating the sampled signals by said carrier phase; correlating the rotated sampled signals; and generating for each subcarrier (E5a, E5b) pseudo-random binary codes and a subcarrier phase, which are used to correlate the rotated sampled signals.</p> |
