Title: Efficient Acquisition Algorithm for Long Pseudorandom Sequence
Authors: Hsieh, Wan-Hsin
Chang, Chieh-Fu
Kao, Ming-Seng
交大名義發表
電信工程研究所
National Chiao Tung University
Institute of Communications Engineering
Issue Date: 1-Jul-2014
Abstract: In this paper, a novel method termed the phase coherence acquisition (PCA) is proposed for pseudorandom (PN) sequence acquisition. By employing complex phasors, the PCA requires only complex additions in the order of N, the length of the sequence, whereas the conventional method using fast Fourier transform (FFT) requires complex multiplications and additions both in the order of N log(2)N. To combat noise, the input and local sequences are partitioned and mapped into complex phasors in PCA. The phase differences between pairs of input and local phasors are used for acquisition; thus, complex multiplications are avoided. For more noise-robustness capability, the multilayer PCA is developed to extract the code phase step-by-step. The significant reduction of computational loads makes the PCA an attractive method, especially when the sequence length of N is extremely large, which becomes intractable for the FFT-based acquisition.
URI: http://dx.doi.org/10.1109/TAES.2014.120460
http://hdl.handle.net/11536/124170
ISSN: 0018-9251
DOI: 10.1109/TAES.2014.120460
Journal: IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS
Volume: 50
Begin Page: 1786
End Page: 1797
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