Patent ID: 7295638

Claim:
A direct sequence spread spectrum (DSSS) communication device, comprising: a frequency generator that generates a local oscillator signal without use of a piezoelectric crystal; a frequency converter that receives the local oscillator signal and mixes the local oscillator signal with a received DSSS signal to produce a down-converted signal, wherein the received DSSS signal is encoded using a first set of DSSS codes; a differential detector that receives the down-converted signal and converts the down-converted signal to a differentially detected signal; and a correlator that receives the differentially detected signal and correlates the differentially detected signal with a second set of DSSS codes, wherein conversion by the differential detector of the down-converted signal to the differentially detected signal prior to correlation by the correlator of the differentially detected signal with the second set of DSSS codes is operable to mitigate effects of at least one of a frequency offset of the local oscillator signal relative to the received DSSS signal and a phase noise of the local oscillator signal.