Patent ID: 7295635
Filing Date: 2007-11-13
Classification: H04B

Abstract:
1. A method for processing a first and a second signal, the first signal being spread over a wide band channel and the second signal being spread over a narrowband channel, and modulating one and the same carrier in a single carrier phase tracking loop controlled by a carrier phase discriminator, comprising the steps of: generating two components sine and cosine phase shifted of a local carrier at the frequency of the carrier, demodulating the first and second signals with the sine and cosine phase shifted components of the local carrier so as to obtain a first couple of quadrature demodulated components I generating a code clock signal, on the base of the code clock signal, generating, a first punctual code and a first Δ code, and a second punctual code and a second Δ code compatible with the pseudorandom code, correlating the first couple of quadrature demodulated components I correlating the second couple of quadrature demodulated components I generating an input signal for the phase discriminator mixing the demodulated and de-spread signal components I generating an input signal for the code discriminator, mixing the demodulated and de-spread signal components I wherein, the input signal for the phase discriminator has its quadrature components I α, β being weighting parameter.