透地无线通信的弱信号捕获算法

杨天绘, 易克初, 田红心

杨天绘, 易克初, 田红心. 透地无线通信的弱信号捕获算法[J]. 信号处理, 2017, 33(7): 978-984.
引用本文: 杨天绘, 易克初, 田红心. 透地无线通信的弱信号捕获算法[J]. 信号处理, 2017, 33(7): 978-984.
A Weak Signal Acquisition Algorithm in Through-the-Earth Communication[J]. JOURNAL OF SIGNAL PROCESSING, 2017, 33(7): 978-984.
Citation: A Weak Signal Acquisition Algorithm in Through-the-Earth Communication[J]. JOURNAL OF SIGNAL PROCESSING, 2017, 33(7): 978-984.

透地无线通信的弱信号捕获算法

详细信息
    通讯作者:

    杨天绘   E-mail: 929892089@qq.com

  • 中图分类号: TN911

A Weak Signal Acquisition Algorithm in Through-the-Earth Communication

  • 摘要: 基于电流场传播的无线透地通信系统,提高接收机灵敏度的关键之一是在尽可能低的信噪比下实现信号的可靠捕获。本文对传统滑动相关捕获算法进行了改进,提出了一种信号捕获新算法。系统采用高增益直接序列扩频及超宽带脉冲基带调制方式,每个码片都调制为一个近似于高斯微分脉冲的正负双峰波形。接收信号以每个码片16个样点的速率采样量化,时分分接为16路信号,各路都用相同的PN码相关器进行滑动相关解扩,每一时刻取其中某两路信号相关量之差作为判决量。理论分析和仿真结果都显示,和传统的滑动相关捕获算法相比,新方法实现可靠捕获所需信噪比可降低7.2dB。
    Abstract: Weak signal acquisition plays a crucial role in current field based through-the-earth communication system. In this paper, we improve the traditional sliding correlation acquisition algorithm and propose a weak signal acquisition algorithm in through-the-earth communication. Ultra-Wideband (UWB) pulse shape modulation and high gain spread spectrumis is adopted by communication system.,and each chip is modulated as a waveform that is similar to a Gaussian derivative pulse with positive and negative peaks. The received signal is sampled and quantized at a rate of 16 samples per chip and divided into 16 channels according to the time tapping technology. Each channel uses the same PN code correlator for sliding correlation despreading. Sixteen correlation values can be obtained and the difference between the two of them are used as a decision parameter. Both theoretical analysis and simulation results validate that the proposed algorithm shows a great advantage over the conventional one about 7.2dB.
  • [1] Bataller V,Munoz A,Molina P,et al..[J].Journal of Communications, 2009, 4(4).
    [2] 郝建军, 孙晓晨.几种透地通信技术的分析与对比[J].湖南科技大学学报(自然科学版), 2014, (01):59-63[J].
    [3] Hao J J, Sun X C.Analysis and comparison of several Through-The-Earth communication technologies[J].Journal of Hunan University of Science and Technology NATURAL SCIENCE EDITION, 2014, (01):59-63.(in Chinese).
    [4] 向新, 易克初, 田红心.穿透岩层地下电流场通信信道分析[J].煤田地质与勘探, 2005, 33(4):77-79
    [5] Xiang X, Yi K C, Tian H X.Channel analysis on underground mine communication by electrical field through stratum[J].Coal Geology & Exploration, 2005, 33(4):77-79
    [6] 王冰.信号捕获算法的研究[J].电子科技, 2014, 27(8):154-156
    [7] Wang B.Research on GPS Signal Capturing[J].Electronic Science and technology, 2014, 27(8):154-156
    [8] 曾兴雯, 刘乃安, 孙献璞.扩展频谱通信及其多址技术[M]. 西安电子科技大学出版社, 2004.
    [9] Zeng X W, Liu N A, Sun X P.Xi’an: Spread Spectrum Communication and Its Multiple Access Technology[M]. Xidian University Press, 2004. (in Chinese).
    [10] 杨灵, 赵笙罡, 胡修林.滑动相关捕获算法改进及性能分析[J].电讯技术, 2007, 47(1):78-81
    [11] Yang L, Zhao S Z, Hu X L.Improvement and Performance Analysis of Slippage Correlation Acguisition for DSSS Signals[J].Telecommunication Engineering, 2007, 47(1):78-81
    [12] Xu X, Chen Y.Research on acquisition method of GPS software receiver[C]// Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on. IEEE, 2012:2791 - 2794.
    [13] 赵志远, 陈树新, 华璐.基于信噪比控制的滑动相关捕获法[J].科学技术与工程, 2013, 13(31):9386-9389
    [14] Zhao Z Y, Chen S X, Hua L.Sliding Correlation Acquisition Method Based on SNR Control[J].Science Technology and Engineering, 2013, 13(31):9386-9389
    [15] F.Nekoogar. Ultra-wideband communication: Fundamentals and application[M].Prentice Hall, 2004.
    [16] Kaplan E D.Understanding GPS: Princip-les and Application[J].Artech House M-obile Communications, 2005, 59(5):598-599
  • 期刊类型引用(3)

    1. 付天晖,刘宝衡,王永斌. 透地无线通信研究综述. 科学技术与工程. 2021(17): 6993-7001 . 百度学术
    2. 陈家璘,周正,冯伟东,贺易,李静茹,赵世文. 应用磁感应技术分析无线透地通信系统的方法探讨. 计算技术与自动化. 2020(03): 32-36 . 百度学术
    3. 杨世康. 基于超宽带脉冲基带调制的弱无线信号捕获方法. 电子制作. 2019(21): 44-45+57 . 百度学术

    其他类型引用(2)

计量
  • 文章访问数:  86
  • HTML全文浏览量:  0
  • PDF下载量:  10
  • 被引次数: 5
出版历程
  • 收稿日期:  2016-10-16
  • 修回日期:  2017-01-17
  • 发布日期:  2017-07-24

目录

    /

    返回文章
    返回