Delay locked loop for use in a gps signal receiver

Details Delay locked loop for use in a gps signal receiver Delay locked loop for use in a gps signal receiver

H - Electricity

03

L

H03L 7/08 (2006.01) G01S 1/00 (2006.01) G01S 5/14 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2173791

Delay locked loop intended to be used in a receiver of signals emitted by a GPS satellite, comprising a pseudo-random code generator (35), a local oscillator (34), a modulator (14) for modulating said pseudo-random code with the output signal of said local oscillator (34), a plurality of signal channels (C1, C2, C3) connected to the output of said modulator (14) and each comprising a pass-band filter (48 to 50). A data processing unit (11) is adapted to control the central frequency of the output signal of said local oscillator as a function of the output signal of said signal detection circuit and to control the central frequencies and the bandwidth of said pass-band filters (48 to 50) in several steps during said acquisition phase, so that said pass-band filters divide up, at each step, one of the pass-bands of the preceding step into non- overlapping pass-bands.

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