Acquisition Algorithms for the GPS L5 Signal

C. Hegarty, M. Tran, A.J. Van Dierendonck

Abstract: his paper describes acquisition algorithms for the new civil GPS L5 signal and evaluates their performance. In particular, two classes of acquisition techniques are described: (1) correlation with the I5 and Q5 signal components using 1-ms coherent integration, (2) correlation with Q5-only using longer coherent integration. It is expected that, as for the L1 C/A-code, 1-ms coherent integration with further non-coherent integration will be the most common approach for cold L5 acquisition since this method provides good performance for a preponderance of applications, and minimizes the number of frequency bins that need to be searched for a rapid time-to-first-fix. Some applications that need to acquire or re-acquire in very low signal-to-noise conditions can benefit tremendously from the dataless component of L5. Using a simple approach described in this paper, correlation of the receiver's replica code with the Q5 component of L5 can be based on very long coherent integrations (limited only by line-of-sight acceleration and the quality of the receiver's oscillator).
Published in: Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003)
September 9 - 12, 2003
Oregon Convention Center
Portland, OR
Pages: 165 - 177
Cite this article: Hegarty, C., Tran, M., Van Dierendonck, A.J., "Acquisition Algorithms for the GPS L5 Signal," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 165-177.
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