摘要
空分多址(SDMA)技术是智能天线技术的集中体现,该技术通过用户空间特征的差异,用阵列天线实现同一信道中多个用户的同步通信,同时把通信系统可利用的资源扩展到空间域.空分多址技术通过信号不同的空间传播路径来区分用户,并且该技术又可以与其他的多址方式相互兼容.使用这种技术可以大大提高通信系统的功能,煤矿井下无线通信是一个技术难度较大的课题,巷道条件对电磁波传输影响很大,并且电磁波在矿井巷道和工作面内的传播是非自由空间,存在严重的多径衰落现象.SDMA技术应用中有减小多径效应的功能,将其应用在煤矿井下会给未来煤矿井下通信质量的提高和改善带来巨大突破.
Space-Division Multiple-Access technology （SDMA） is the embodiment of smart antenna technology. Taking advantage of the spatial difference of users, it uses antenna array to realize the commu- nication of multiple users in the same channel, and at the same time, the technology can expand the availa- ble resources of the communication system to the spatial domain. The SDMA technology can distinguish users by the different space propagation paths of signals, and is compatible with other Multi-access man- ner. Using this technology can greatly improve the function of the communication system. The wireless communication technology is a quite difficult study in coal mine fields. In the coal mine, the multipath fa- ding phenomenon is severe. The SDMA can effectively improve and reduce this multipath fading phenome- non. Its application in underground mines will bring huge breakthrough to the quality improvement of fu- ture underground mine communication.
出处
《徐州工程学院学报（自然科学版）》
CAS
2012年第3期51-55,共5页
Journal of Xuzhou Institute of Technology(Natural Sciences Edition)
关键词
空分多址
智能天线
通信系统
煤矿
space-division multiple-access
smart antenna
communication system
coal mine
