Open AccessDelayed sampling technique for high‐order BOC signals acquisition
Author(s) -
Liu Zhijun,
Li Baiyu,
Zhu Xiangwei,
Li Lixun,
Sun Guangfu
Publication year - 2019
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2018.6336
Subject(s) - binary offset carrier modulation , computational complexity theory , sampling (signal processing) , signal (programming language) , algorithm , computer science , replica , binary number , frequency offset , offset (computer science) , nyquist–shannon sampling theorem , mathematics , electronic engineering , telecommunications , bit error rate , engineering , detector , decoding methods , art , visual arts , arithmetic , quadrature amplitude modulation , programming language , channel (broadcasting) , orthogonal frequency division multiplexing , computer vision
Binary offset carrier (BOC) signals are applied in modernised global navigation satellite system. High‐order BOC signals provide good performance in spectrum separation and signal tracking. However, for high‐order BOC signals, the sampling frequency is much higher than that of binary phase‐shift keying signals, which increases computational complexity. Meanwhile, the zero crossings in the correlation function degrade the detection performance. In this Letter, band‐pass sampling is introduced for BOC signals to reduce the computational complexity and remove the zero crossings. A delayed replica of the received signal is used to construct a complex signal which is sampled with a much lower sampling frequency than the Nyquist frequency. The correlation function of the sampled signal has no secondary peaks. Thus, the detection probability is higher and the computational complexity is lower.