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1)  mine wireless communications
矿井无线通信
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2)  underground wireless communication
井下无线通信
1.
According to properties of underground wireless communications in coal mine,a channel model submitting to the Rayleigh distribution with a frequency selective fading is set up.
根据煤矿井下无线通信特性,建立了服从瑞利分布的具有频率选择性衰落的信道模型,研究了动态改变传输比特与功率分配的自适应正交频分复用(OFDM)算法。
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3)  wireless conveying
油井无线通信
4)  coal mine communication
矿井通信
1.
Application of coal mine communication for DSSS can promote the coal mine communication according to analyse the impacts of coal mine environment to the coal mine communication,DSSS technology is profitable to strengthen the safety and achieve the demand of modernization of coal well.
通过分析矿井环境对矿井通信系统的影响,说明了将直接序列扩频通信技术在煤矿井下应用能推动煤矿通信的发展,对于加强煤矿的安全生产,提高抢险救灾能力,以及煤矿生产现代化都有非常重要的意义,最后给出了基于扩频芯片Z2000的矿井通信模型。
2.
The problems in need of immediate solutions in coal mine communication are feeble antiinterference ability and poor speech quality.
　矿井通信急需解决的问题是提高通信系统的抗干扰性能和通话质量。
3.
The problems in need of immediate solutions in coal mine communication are feeble anti-interference ability and poor speech quality.
矿井通信急需解决的问题是提高通信系统的抗干扰性能和通话质量。
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5)  mine communication
矿井通信
1.
Anti-jamming technology and its applications to coal mine communication;
矿井通信的抗干扰技术分析及其应用
2.
The effect of mine environment on the mine communication was analysed,the principle of(direct) sequence spread spectrum(DSSS) was discussed and the character of antidisturbance of DSSS was presented.
分析了矿井环境对矿井通信系统的影响,阐述了直接序列扩频通信的原理,指出了直接序列扩频技术的抗干扰特点,并给出了该通信模式的模型、基于扩频芯片Z2000的矿井通信的具体实现方案。
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6)  Coal mine laneway wireless channel model
矿井巷道无线信道模型
补充资料：无线电通信波段(见无线电通信)


无线电通信波段(见无线电通信)
radio communication wave range

wuxiandian tongXin boduan无线电通信波段(rads。。ommunicationWaVe range)见无线电通信。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条