Performance of Assisted Acquisition of the L2CL Code in a Multi-Frequency Software Receiver

Ayse Sicramaz Ayaz, Thomas Pany, Bernd Eissfeller

Abstract:	Acquisition is a crucial and the most time/processing power consuming process in a GNSS receiver. When using long PRN codes for the planned new GNSS signals, the computational demand increases further. In this work we present a method to directly acquire the L2 Civil Signal Long Code (L2CL) and evaluate its performance using simulated signals. The distinctive feature of the L2CL is its long period of 1.5s, which on one hand provides acquisition sensitivity around 10 dBHz but on the other hand requires good assistance data. Moreover, it is affected by several error sources such as clock jitter, line-of-sight acceleration and multipath fading effects irrelevant for short (1-20 ms) integration times. These techniques and problems are discussed in the paper and may find their usages for dedicated indoor positioning applications eventually using a server side signal processing.
Published in:	Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007) September 25 - 28, 2007 Fort Worth Convention Center Fort Worth, TX
Pages:	1830 - 1838
Cite this article:	Ayaz, Ayse Sicramaz, Pany, Thomas, Eissfeller, Bernd, "Performance of Assisted Acquisition of the L2CL Code in a Multi-Frequency Software Receiver," Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007), Fort Worth, TX, September 2007, pp. 1830-1838.
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