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大连市沿海丘陵地区地铁精密控制网关键技术研究 被引量:1
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作者 刘伟 《测绘与空间地理信息》 2017年第10期205-206,210,共3页
介绍了大连市沿海丘陵地区地铁施工控制网布设、观测中关键技术的研究及解决方案,其中利用GPS静态观测与传统精密导线测量相结合组成混合网平差、将精密导线点纳入二等水准网,实现平高复用等技术,可给同类工程实施提供参考。
关键词 地铁 控制网 精密导线 二等水准 平高复用
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Analysis of OFDM Applied to Powerline High Speed Digital Communication 被引量:1
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作者 庄建 杨公训 《Journal of China University of Mining and Technology》 2003年第2期174-178,共5页
The low voltage powerline is becoming a powerful solution to home network, building automation, and internet access as a result of its wide distribution, easy access and little maintenance. The character of powerline ... The low voltage powerline is becoming a powerful solution to home network, building automation, and internet access as a result of its wide distribution, easy access and little maintenance. The character of powerline channel is very complicated because it is an open net. This article analysed the character of the powerline channel,introduced the basics of OFDM(Orthogonal Frequency Division Multiplexing), and studied the OFDM applied into powerline high speed digital communication. 展开更多
关键词 powerline carrier communication OFDM high speed digital communication
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