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International Journals

A Deterministic Compressed GNSS Acquisition Technique
Year 2013
Month
Journal February 2013 / IEEE Transactions on Vehicular Technology [SCI, IF 2.642, JCR Top 12.82%, SJR 1.362], vol. 62, no. 2, pp. 511-521
Author Seung-Hyun Kong
File 첨부 A_Deterministic_Compressed_GNSS_Acquisition_Technique.pdf (1.2M) 12회 다운로드 DATE : 2021-07-15 17:46:21
Link 관련링크 https://ieeexplore.ieee.org/document/6316189 660회 연결

In the cold start of a Global Navigation Satellite Systems (GNSS) receiver, fast acquisition of the GNSS signal requires either an extensive usage of hardware resources for massive parallel correlators or a high computational complexity for fast Fourier transform (FFT) and inverse FFT operations. Because GNSS uses direct-sequence spread spectrum (DSSS) signaling with binary phase-shift keying (BPSK) or with BPSK and binary offset carrier, any GNSS signal can have a sparse representation so that the concept of compressed sensing can be applied to detect GNSS signals. To achieve a fast acquisition of the GNSS signal with a reduced number of correlators and low computational complexity, we propose a two-stage deterministic compressed GNSS acquisition technique using the Walsh-Hadamard matrix. The proposed technique makes fast acquisition possible for a receiver using a much smaller number of correlators than the conventional parallel-correlator-based technique, which requires much less computational complexity than the FFT-based technique. We provide complexity analysis of the proposed technique and compare the statistical performance of the proposed technique with other techniques applicable to the fast GNSS acquisition. The proposed technique is easy to implement and is the first compressed-sensing-based GNSS acquisition technique.