Use of comb filters in GPS L1 receivers

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Abstract
Comb filters can be designed by replacing single delays in digital filters by multiple delays. These filters are `periodic` in the sense that their frequency response repeats itself at fixed intervals. They are thus well suited to a signal such as GPS L1 which has a spectrum made up of lines separated by the code repetition frequency of 1 kHz. In this paper we examine how periodic filters can be used in a conventional GPS L1 receiver. We find that comb filters assist with acquisition of weak signals, and can improve code-tracking performance. © 2007 Springer-Verlag.
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Author(s)
Dempster, Andrew
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2008
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Journal Article
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UNSW Faculty
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