中文摘要：

基于所建立的Nakagami分布矿井巷道宽带统计分段信道模型,仿真研究了多载波直接序列扩频码分多址接入（MC-DS-CDMA）调制技术在矿井巷道中的宽带无线通信性能。仿真结果表明矿井MC-DS-CDMA系统误码率性能主要决定于矿井巷道的幅度衰落情况,而基本不受矿井巷道信道时延扩展的影响。矿井MC-DS-CDMA系统在矿井巷道信道环境下对多普勒频移的抑制能力比较弱。当脉冲干扰发生不频繁时,矿井MC-DS-CDMA系统受脉冲干扰影响不大,但当脉冲干扰发生频繁时,矿井MC-DS-CDMA系统误码率性能恶化。在多用户情况下矿井MC-DS-CDMA系统的误码率性能明显优于矿井DS-CDMA系统。

英文摘要：

Based on the multi-section Nakagami distribution statistical channel model of mine tunnel for wideband radio wave, the bit error rate （BER） performance of multicarrier direct-sequence code-division-multiple-access （MC-DS-CDMA） modulation in mine tunnel was simulated Simulation results indicate that the BER performance of MC-DS-CDMA is decided mainly by the channel attenuation, and not by the root-mean-square （RMS） time delay of wideband radio wave along straight or embranchment tunnel. Doppler frequency offset has serious effect on the BER performance of MC-DS-CDMA modulation in mine tunnel. The BER performance of MC-DS-CDMA modulation in mine tunnel is affected little by impulse interference when it happens infrequently. However, the BER performance is affected seriously by impulse interference when it happens frequently. In case of multiusers, the BER performance of MC-DS-CDMA in mine tunnel is much better compared to that of DS-CDMA modulation.