无线调制技术在矿井空直巷道中的性能分析及比较

Analysis and Comparison of the Performance About Wireless Modulation Technologies in Empty and Straight Mine Tunnel

为建立高效的矿井无线通信系统,本文在研究了矿井巷道信道的衰落情况后,建立了矿井空直巷道信道下窄带和宽带信号误码率与传输距离之间的关系,研究了矿井空直巷道对通信频率分别为900 MHz1、800 MHz和2.4 GHz的窄带和宽带信号无线传输的影响.通过比较分析,得出这样的结论:与频率分别为900 MHz和1800 MHz的信号相比,2.4 GHz的信号能以较低的数据速率(几十kbit/s)覆盖更长的通信距离;此外,宽带信号大大提高了误码率性能,比窄带信号可多传几十米,更利于井下无线传输.

In order to establish an effective wireless communication system in underground coal mine. After studying the fading situation of mine tunnel, this paper found out the relationship between the bit error rate （BER） of narrowband and wideband signal and transmission distance in the empty and straight mine laneway. The effects of the laneway channel on the signal at the frequency of 900 MHz, 1800 MHz and 2.4 GHz is studied respectively. By comparison and analysis, it is concluded that com- pared with the signal at the frequency of 900 MHz and 1800 MHz, the signal of 2.4 GHz cover longer distance in the laneway when the data rate is low （such as several tens of kbit/s）. Besides, wideband signal can improve the BER performance significantly, transmit more several decameters, and is more suitable for wireless communication than narrowband signal in mine tunnel.