A New Method to Enhance GPS SNR and its Application in Fast Signal Acquisition

Yu Lu, Jingrong Cheng, Jay A. Farrell

Abstract:	"GPS signals received on the earth are extremely weak, about -157dBW for the C/A-code, -160dBW for P(Y)-code on L1, and -163dBW for P(Y)-code on L2 [4]. Especially for signal acquisition, it is always desirable to process the GPS signal to enhance the resulting SNR. In this paper we introduce a new method to enhance GPS SNR in a soft-radio approach. The paper will present the theoretical analysis and several properties of this method. Based on the enhanced signal, we introduce a new fast acquisition algorithm, which requires only 1/10 of the computational load of traditional FFT-based acquisition algorithms. Due to the increased SNR of the newly generated signal, the new acquisition method also decreases the false alarm rate. Preliminary processing based on GPS signal samples veries this method."
Published in:	Proceedings of the 61st Annual Meeting of The Institute of Navigation (2005) June 27 - 29, 2005 Royal Sonesta Hotel Cambridge, MA
Pages:	535 - 542
Cite this article:	Lu, Yu, Cheng, Jingrong, Farrell, Jay A., "A New Method to Enhance GPS SNR and its Application in Fast Signal Acquisition," Proceedings of the 61st Annual Meeting of The Institute of Navigation (2005), Cambridge, MA, June 2005, pp. 535-542.
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