文章基本信息

标题：A two-step MF signal acquisition method for wireless underground sensor networks
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作者：Liang, Wei ; Xie, Yong ; Chen, Xuhui 等
期刊名称：Computer Science and Information Systems
印刷版ISSN：1820-0214
电子版ISSN：2406-1018
出版年度：2016
卷号：13
期号：2
页码：623-638
DOI：10.2298/CSIS160224019L
出版社：ComSIS Consortium
摘要：Signal acquisition plays a critical role on the bit error rate (BER) of a direct sequence spread spectrum (DS/SS) communication system working with low frequency. In this paper, we propose a new signal acquisition method. The acquisition process includes coarse matched filter (MF) location in the first stage and an accurate MF acquisition as a verification mode for the second stage. The performance metrics, including mean acquisition time (MAT) and power consumption, are accuracy. The results indicate that when the signal-to-noise ratio (SNR) keeping consistent, the MAT of the proposed method is less than the original one. When the SNR is around -5dB, the system mismatch rate is about 5:6 x 10-4, which takes only one percent of those achieved in the original acquisition algorithms. The two-step MF acquisition method is stable except its power consumption being a little higher than the original method.
关键词：acquisition; spread spectrum; signal processing; wireless communication; underground sensor networks