DS-CDMA调制技术在矿井巷道中的通信性能分析

Analysis on communication performances of DS-CDMA modulation technology in mine roadway

提出适合于矿井巷道信道特点的高效无线调制技术,根据沿矿井巷道宽带无线电波传播时延及所建立的基于Nakagami分布的矿井巷道宽带统计分段信道模型,研究了在1.8GHz和2.4GHz这2个典型UHF频段下直接序列扩频码分多址接入(DS-CDMA)调制技术在矿井巷道中的宽带无线通信性能。矿井DS-CDMA通信系统可有效地利用多径信号提高系统的性能。如在相同的矿井巷道环境下,2.4GHz的系统可分离的信号多径数多,使其误码率性能优于1.8GHz的系统。多普勒频移和脉冲干扰对矿井DS-CDMA通信系统误码率性能有很大影响。当多普勒频移和脉冲干扰很大时,系统的误码率性能下降严重,2.4GHz系统的误码率性能可能劣于1.8GHz系统。

In order to provide an effective radio modulation technology suitable to the signal channel features of the mine roadway and according to the time delay of the wideband radio wave along mine roadway as well as the wideband statistic sectional signal model of the mine roadway established base on Nakagami distribution, the paper analyzed the wideband radio communication performances of the direct sequence code-division multi access input modulation in the mine roadway under the typical UHF frequency of 1.8 GH...