Performance Assessment of an Under-Sampling SWC Receiver for Simulated High-Bandwidth GPS/Galileo Signals and Real Signals

T. Pany, S.W. Moon, M. Irsigler, B. Eissfeller, K. Fürlinger

Abstract:	The paper proposes an overall design and a tracking channel structure for a genuine software correlator (SWC) receiver running on a conventional PC. The distinctive new features of the tracking channel structure are that it runs with sample rates below the Nyquist rate, allows the use of arbitrary code and phase reference tracking functions (e.g. early minus late, Strobe, ...) and that it has been can be efficiently implemented on a SSE2 command set supporting processor, like the Intel Pentium IV or the AMD Opteron. The tracking performance in terms of thermal noise and multipath of these tracking channels is described for a BPSK(1), BPSK(10) and BOC(2,2) signal. The processing load on the CPU is analyzed in detail for the code and phase generators and for the correlation process. FFT acquisition and BOC signal tracking is also discussed. By using arbitrary sample rates and the highly optimized correlation code, an efficient real-time SWC receiver can be implemented for all future navigation signals.
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:	103 - 116
Cite this article:	Pany, T., Moon, S.W., Irsigler, M., Eissfeller, B., Fürlinger, K., "Performance Assessment of an Under-Sampling SWC Receiver for Simulated High-Bandwidth GPS/Galileo Signals and Real Signals," 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. 103-116.
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