地理信息系统(Geographic Information System,GIS)用于收集、存储、分析以及展示地理和空间数据。在电力通信领域,GIS技术可以优化光缆的勘察和维护工作,通过精确的地理位置数据,帮助分析环境因素和实施实时监控。应用该技术不仅能提...地理信息系统(Geographic Information System,GIS)用于收集、存储、分析以及展示地理和空间数据。在电力通信领域,GIS技术可以优化光缆的勘察和维护工作,通过精确的地理位置数据,帮助分析环境因素和实施实时监控。应用该技术不仅能提升勘察和维护效率,而且可以增强系统的可靠性和响应能力。文章设计一个基于GIS技术的电力通信光缆勘察及维护系统,深入分析GIS在电力通信光缆勘察中的应用,包括环境因素的分析和实时数据监控。同时,详细介绍了系统设计中自动化故障检测、实时数据处理系统、系统评估的具体实施方案。最后,通过应用测试,验证文章设计系统的有效性。展开更多
In wireless communications systems with time-division duplex (TDD) deployment, channel reciprocity and symmetric interference between transmitter and receiver sides are two widely-adopted assumptions for the design of...In wireless communications systems with time-division duplex (TDD) deployment, channel reciprocity and symmetric interference between transmitter and receiver sides are two widely-adopted assumptions for the design of optimal adaptation transmission mode. However, in practice, there is an undesirable but non-negligible effect, namely the asymmetric interference, that makes the assumptions no longer valid. In this paper, a simple closed-loop feedback method of compensating interference asymmetry in TDD multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system is proposed. The system makes the estimated interference at transmit-side be able to track the instantaneous receive-side interference dynamically. The proposed method maintains constant frame error rate (FER) by adopting adaptive modulation coding (AMC) and power loading. The final simulations have verified the effectiveness of the new method.展开更多
文摘地理信息系统(Geographic Information System,GIS)用于收集、存储、分析以及展示地理和空间数据。在电力通信领域,GIS技术可以优化光缆的勘察和维护工作,通过精确的地理位置数据,帮助分析环境因素和实施实时监控。应用该技术不仅能提升勘察和维护效率,而且可以增强系统的可靠性和响应能力。文章设计一个基于GIS技术的电力通信光缆勘察及维护系统,深入分析GIS在电力通信光缆勘察中的应用,包括环境因素的分析和实时数据监控。同时,详细介绍了系统设计中自动化故障检测、实时数据处理系统、系统评估的具体实施方案。最后,通过应用测试,验证文章设计系统的有效性。
基金the National Natural Science Foundation of China (No. 60572130)the Open Research Fund of National Mobile Communications Research Laboratory,Southeast University+3 种基金the Research Fund of Qing-Lan Engineering, Jiangsu Provincethe Key Project of Natural Science Research Program of Universities, Jiangsu Province (No. 08KJD510001)the Doctorial Fundation of Ministry of Educationthe National Basic Research Program (973) of China (No. 2007CB310607)
文摘In wireless communications systems with time-division duplex (TDD) deployment, channel reciprocity and symmetric interference between transmitter and receiver sides are two widely-adopted assumptions for the design of optimal adaptation transmission mode. However, in practice, there is an undesirable but non-negligible effect, namely the asymmetric interference, that makes the assumptions no longer valid. In this paper, a simple closed-loop feedback method of compensating interference asymmetry in TDD multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system is proposed. The system makes the estimated interference at transmit-side be able to track the instantaneous receive-side interference dynamically. The proposed method maintains constant frame error rate (FER) by adopting adaptive modulation coding (AMC) and power loading. The final simulations have verified the effectiveness of the new method.
