Patent ID: 7068704

Claim:
A mobile unit receiver suitable for use in a wireless communication network, comprising: a receiving section configured to receive from a transmitting station a wireless communication signal having a plurality of frames and a spread spectrum chirp navigation signal embedded in the communication signal in synchronization with said frames; a synthesizer unit configured to generate a frequency signal; a mixer having a first input port coupled to the receiving section, a second input port coupled to the synthesizer unit, and an output port outputting a wireless communication signal downconverted based on the frequency signal; and a signal processor unit coupled to the mixer and configured to receive the downconverted signal output from the mixer, wherein the signal processor unit is configured to detect the embedded spread spectrum chirp navigation signal and to correlate it with a reference chirp signal to output a pseudorange measurement signal based on the correlation; wherein the synthesizer unit is coupled to the signal processor unit and is configured to adjust the frequency signal based on the pseudorange measurement signal.