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《Journal of China Coal Society》 2011-09
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Integrated attenuation model and BER performance analysis of typical wireless transmission technologies in mine tunnel

ZHANG Yu1,2,YANG Wei1,2(1.State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,China;2.State Key Laboratory of Coal Resources and Safe Mining(China University of Mining and Technology(Beijing)),Beijing 100083,China)  
According to the wireless transmission characteristics in mine tunnels,a tunnel integrated attenuation model was proposed.The attenuation model is composed of two parts:large-scale fading,including pass-loss and shadowing,and small-scale fading,including multi-path and Doppler shift.The accuracy of the proposed model was supported by the match between analytical results and testing data.Based on the integrated attenuation model,the bit error rate(BER) performance by distance of many transmission technologies including Orthogonal Frequency Division Multiplexing(OFDM),Multiple Carrier Code Division Multiple Access(MC-CDMA),MC-DS-CDMA,DS-CDMA and MT-CDMA,were simulated.Simulation results indicate that spread frequency(SF) systems,e.g.MC-CDMA,have better performances in the case of short distances.When the distance is increased,especially before the breakpoint of the model,the BER performances of those SF systems are dramatically declined because of the increased multi-path time delay.By contrast,OFDM system can effectively overcome multi-path fading,leading to a better BER performance in the case of long distance.Therefore,OFDM technique is suitable for the long distance communication in mine tunnels,while SF based techniques are appropriate for short distance environment.
【Fund】: 国家自然科学基金重点资助项目(50534060);; 国家高技术研究发展计划(863)资助项目(2007AA06Z106);; 煤炭资源与安全开采国家重点实验室(中国矿业大学(北京))开放课题资助项目(2007-06)
【CateGory Index】: TN919.3
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