A Novel Software GPS Receiver Architecture using Partial Down-Conversion

Sung-Hyuck Im, Gyu-In Jee, Sang-Do Cho, and Sun-Jun Ko

Abstract:	In this paper, for implementing a real-time software GNSS receiver we propose the highly efficient and fast algorithms such as partial down-conversion, phase rotator, composite I&Q accumulation, Virtual DCO technique, and parallel acquisition using FFT. When the proposed algorithms are used, more 12 tracking channels with 3 tracking arm(early-prompt-late) is operated real-time on Intel Pentium-III 1.0 GHz personal computer. Also, the partial down-conversion reduces the FFT size, for parallel acquisition, to 1/8 of conventional FFT-size and the program size includes map is not exceed 1Mbyte. Finally, the proposed real-time software GNSS receiver using the proposed algorithms provides the navigation solution with below 10 meter rms error.
Published in:	Proceedings of the 2007 National Technical Meeting of The Institute of Navigation January 22 - 24, 2007 The Catamaran Resort Hotel San Diego, CA
Pages:	702 - 707
Cite this article:	Im, Sung-Hyuck, Jee, Gyu-In, Cho, Sang-Do, Ko, Sun-Jun, "A Novel Software GPS Receiver Architecture using Partial Down-Conversion," Proceedings of the 2007 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2007, pp. 702-707.
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