Patent ID: 6850558
Filing Date: 2005-02-01
Classification: H04B,H04J

Abstract:
1. A digital receiver part of a spread spectrum receiver for processing a digital signal, said receiver part comprising: an input for an intermediate-frequency signal; an output for outputting a carrier and code demodulated signal; a spreading code demodulator part, to whose input is connected the intermediate-frequency signal; a carrier demodulator part, which succeeds the spreading code demodulator part on a path of said digital signal; and a processing part, which succeeds the carrier demodulator part on said path, and from whose out put the carrier and code demodulator signal is obtained, the spreading code demodulator part comprising at least two signal paths, both of which comprise a) a code mixer for code demodulation of the digital signal by means of a local spreading code replica, and b) first means for lowering a sampling frequency of the digital signal, said first means being arranged to succeed the code mixer on said path, and the carrier demodulator part comprising a) a carrier mixer for carrier demodulation of the digital signal by means of a local carrier replica, and b) a multiplexer for directing signals from outputs of the first means of the spreading code demodulator part in a time multiplexed manner to the carrier mixer.