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透地信道中BPSK信号传输特性的实验研究 被引量:2

Experimental studies on characteristics of BPSK signal transmitting in through-the-earth communication channel
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摘要 利用搭建的弹性波透地通信系统试验平台,对BPSK调制信号通过模拟分层大地信道的传输幅频特性和衰落特性进行了试验测试,得到了BPSK信号在大地信道中传播的衰减和衰落情况,通过对比发送和接收信号得出结论:时域上,接收的BPSK调制信号有明显的衰落现象,从频谱上看,其越高的频率成分在通过大地信道时幅度衰减越大.另外实验结果表明,现有平台在信号中心频率200~300Hz时传输效果最好. By a simplified elastic wave through - the - earth communication system model, an experiment using BPSK modulated elastic wave as source signal to transmit the simulated stratified earth channel is performed in order to test the earth channel characteristics. Hence the through- the -earth channel amplitude- frequency and fading characteristics are achieved. By comparing features of the sending and receiving signals, conclusions can be drawn as follows: from the time domain, the receiving BPSK signal fading is an evident feature, and high frequency components attenuate greater than low frequency component. Experiment results also show that the experiment channel attenuation is up to the minimum level at 200 -300 Hz.
作者 李辉 郝建军
出处 《矿业工程研究》 2012年第3期73-76,共4页 Mineral Engineering Research
基金 国家自然科学基金资助项目(60171087)
关键词 透地通信:衰落:幅频特性 through - the - earth communication fading amplitude - frequency characteristics
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  • 1郝建军,赵媛,郭银景.平面弹性波信号在地层介质中的传输损耗特性[J].煤炭学报,2011,36(S1):211-214. 被引量:8
  • 2向新,罗奕,易克初,张仲礼,田红心,王继矿.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. 被引量:14
  • 3Yenchek M R, Homce G T, Damiano N W, et al. NIOSH- Sponsored research in through - the - earth communications for mines: a status report [ J ]. IEEE Transactions on Industry Applications, 2012, 48 ( 5 ) : 1700 - 1707.
  • 4Wadley T L. Underground communication lay rocks in gold mines on the witwaterrand[ R]. South African Council for Scientific and Industrial Keseareli, Report T. R. L, Johannesburg, South Africa 1946.
  • 5Pritchett W C. Attenuation for radio frequency wavesthrough the earth[J]. Geophysics, 1952, 17(2) : 193- 207.
  • 6Wait J, Spies K. Sub surface electromagnetic fields of a circular loop of current located above ground [ J ]. IEEE Trans Antennas Propagate, 1972,10 : 520 - 522.
  • 73eyer R G. Constraints of affecting through - the - earth eleCtromagnetic signaling and location techniques [ J ]. Radio Science, 1976, 11 (4) : 323 -342.
  • 8Wait J R. Electromagnetic surface impedance for a layered earth for general excitation[ J]. Radio Science, 1980, 15 (1) : 129 -134.
  • 9Hill D A, Wait J R. Theoretical noise and propagation models for through - the - earth communication, PB84 - 166628 [ R ]. The United States National Telecommunications and Information Administration Institute for Telecommunication Sciences. Boulder, The United States, 1982.
  • 10Durkin J. Apparent earth conductivity over coal mines as estimated from through - the - earth electromagnetic transmission tests, PB84 - 213792 [ R]. The United States Department of the Interior, Bureau of Mines, Pittsburgh, The United States, 1984.

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