Abstract
An algorithm is developed to process IF signal data from a GPS RF
front-end module, which consists of a down converter and an ADC.
The down converter converts the signal from RF to IF, the ADC samples
the IF signal. All the other processing including signal acquisition,
tracking, data decoding and solving position are implemented in software
using base-band signal processing techniques. The local C/A codes
and carrier replica signal are pre-generated, stored in memory, and
used respectively during signal acquisition and tracking. In order
to evaluate the algorithm, this paper demonstrates standalone positioning
using the measured pseudoranges of which accuracy depends on DLL
parameter of the correlator of early/late spacing. This paper presents
the explanation and evaluation of the algorithm.
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