| 摘要 |
The global positioning system (GPS) receiver of the present invention operates to search a range of frequencies by correlating a baseband signal corresponding to a received GPS signal with a generated frequency and a generated code at a plurality of time offsets. Address translation logic operates to group results of the correlation according to the plurality of time offsets by translating addresses received from a direct memory access (DMA) controller in order to improve the efficiency of performing a fast Fourier transform (FFT) on the results of the correlation. The transformed data produced by the FFT process are used by the GPS receiver to determine a frequency of the received GPS signal and a time offset associated with a ranging code carried in the received GPS signal.
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