摘要
针对煤矿井下传播环境复杂,严重影响信号传播特性和矿井通信系统的可靠性,通过模拟空直巷道和分支巷道的井下实际环境,科学选择OFDM系统参数,建立能同时反映大尺度衰落和小尺度衰落的矿井巷道综合衰减模型,研究OFDM调制技术在矿井巷道综合衰减模型中的误码性能,通过Matlab仿真表明,OFDM调制技术对大尺度衰落有很强的抵抗性,在井下多径环境下显著改善无线通信系统的性能。
The environment is complex in mine tunnels. It will seriously affect the signal characteristics and the reliability of mine communication system, we simulated the physical environment of empty straight tunnel and branch tunnel, Meanwhile, we selected OFDM system parameters Scientifically and presented a runnel comprehensive channel model, in which both small-scale and large-scale fading are considered, and studied the BER performance of wide band communication systems which used OFDM modulation technology under the special confined space of mine tunnel. The Matlab simulation results shows： OFDM modulation techniques has great resistance to large-scale fading, OFDM after designed for various places has great performance under multipath.
出处
《电子设计工程》
2013年第2期74-76,共3页
Electronic Design Engineering
基金
渭南师范学院科研资助项目(12YKS025)
陕西省教育厅科研资助项目(11JK1067)
关键词
OFDM
矿井巷道
模型
误码率
性能
OFDM
mine tunnel
model
Bit Error Rate （BER）
performance
