APPARATUS FOR AND METHOD OF DOPPLER SEARCHING IN A DIGITAL GPS RECEIVER

摘要

A digital receiver (100) for GPS C/A-code signals. The GPS receiver (100) of the present invention provides reception and tracking a plurality of satellites simultaneously, using four separate receiver channels. The GPS receiver (100) of the present invention includes an analog front-end (104) for selecting and frequency translating the received GPS signal. The GPS receiver (100) further includes a highspeed digital signal processor (110) for recovering the despread data of the GPS signal. The baseband signal is further processed by a general purpose digital signal processor (112) for signal search, tracking, and data recovery operations, and a microprocessor (114) provides overall receiver control, and interface with the operator of the GPS receiver (100).