矿井巷道综合衰减模型与无线传输误码率性能综合比较  

Integrated attenuation model and BER performance analysis of typical wireless transmission technologies in mine tunnel

作　　者：张玉[1,2] 杨维[1,2] 

机构地区：[1]北京交通大学轨道交通控制与安全国家重点实验室,北京100044 [2]煤炭资源与安全开采国家重点实验室(中国矿业大学(北京)),北京100083

出　　处：《煤炭学报》2011年第9期1581-1586,共6页Journal of China Coal Society

基　　金：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)

摘　　要：根据矿井巷道环境中大尺度衰减与小尺度衰减对无线信号传输的影响,提出了矿井巷道综合衰减模型。在矿井巷道环境下,通过将无线信号衰减的理论分析结果与基于模型的测试数据进行比较,验证了该模型的准确性。基于该模型,采用距离度量的方法比较研究了多载波码分多址(MC-CDMA)、正交频分复用(OFDM)等无线传输技术在巷道环境中的误码率性能。仿真结果表明:以MC-CDMA为代表的扩频调制传输技术在近距离通信时的误码率性能较好,而OFDM则在远距离通信中表现出较强的抗衰减特性。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.

关 键 词：矿井巷道 综合衰减模型 误码率 MC-CDMA OFDM 

分 类 号：TD655.3[矿业工程—矿山机电]