CSSR: a 2FOR1 Compressive Sensing Software Receiver with Combined Correlation for GPS-CA and Galileo-OS Signals

Ali Albu-Rghaif and Ihsan Alshahib Lami

Peer Reviewed

Abstract:	This is a 2for1 receiver because it acquires both GPS and Galileo signals at less than 50% of the complexity and processing time required by a Matched Filter acquisition receiver. CSSR is a new implementation of a dual-GNSS-signal Software Receiver using, for the first time, the Compressive Sensing technique to process the two signals at the same time (in this implementation, GPS C/A code and Galileo OS code signals are used). This paper indorses that Compressive Sensing can be effectively used to acquire GNSS signals with its information-band sampled at below the Nyquist rate. This paper describes this implementation, focusing on: (a) how we remove the subcarrier frequency effect from the Galileo signal, and combine it with the GPS signal; (b) how we pre-process this combined signal to generate the non-Doppler shift vectors that compensates for the matching measurements in the acquisition; and finally (c) how we acquire both signals simultaneously by combining their dictionaries/correlators. CSSR has been simulated using various actual signal conditions/scenarios. The results are compared to those obtained from running the same tests on 3-other matched filter receivers. CSSR achieves similar probability of detection to the others, and has a higher frequency resolution of 10Hz for the same 4ms dwell time. With Application processors on-board Smartphones getting more powerful and cheaper, and with 60% of the 3.1 billion dual GNSS offering on-board current Smartphones are based on side-by-side implementations, we believe that CSSR is a good candidate to saving cost and valuable battery energy when implemented on-board Smartphones.
Published in:	Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015) September 14 - 18, 2015 Tampa Convention Center Tampa, Florida
Pages:	3206 - 3217
Cite this article:	Albu-Rghaif, Ali, Lami, Ihsan Alshahib, "CSSR: a 2FOR1 Compressive Sensing Software Receiver with Combined Correlation for GPS-CA and Galileo-OS Signals," Proceedings of the 28th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2015), Tampa, Florida, September 2015, pp. 3206-3217.
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