Closed Form Solutions of Joint Water-Filling for Coordinated Transmission
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概要
- 論文の詳細を見る
It is known that traditional water-filling provides a closed form solution for capacity maximization in frequency-selective channels or fading channels with adaptive modulation. However, the solution is derived from a maximum mutual information argument with a single total power constraint. Motivated by the new technology of coordinated multiple point transmission (CoMP), this paper considers a novel power allocation scheme for a frequency-selective fading channel with multiple coordinated transmission points (CTP) transmission, in which each CTP has a power constraint and an individual channel state information (CSI). In order to maximize the channels throughput, closed form solutions are obtained by solving a non-convex constrained optimization problem. The solution turns out to take the form of traditional WF and also combined with some regular cooperative feature. Based on the derived solution, we firstly investigate a joint water-filling (Jo-WF) power allocation scheme and a new iterative Jo-WF algorithm. Numerical results are presented to verify the optimality of the derived scheme and to show throughput gains over traditional non-coordinated water-filling (WF) and equal power allocation (EPA). Considering the flexibility of CTPs category, e.g., base station or relay station, it is known that the derived Jo-WF power allocation scheme can be valid for any coordinated networks such as next-generation cellular networks or ad-hoc networks.
- （社）電子情報通信学会の論文
- 2010-12-01
著者
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ZHANG Ping
Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Po
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WANG Hui
Key Laboratory of Forest Plant Ecology, Northeast Forestry University
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Zhang Ping
Bupt Chn
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Wang Hui
Key Laboratory Of Automobile Materials Of Ministry Of Education And Department Of Materials Science
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Tao Xiaofeng
Beijing University of Posts and Telecommunications
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Tao Xiaofeng
Key Laboratory Of Universal Wireless Communications Bupt
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Zhang Ping
Key Laboratory Of Universal Wireless Communications Bupt
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CUI Qimei
Key Laboratory of Universal Wireless Communications, BUPT
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LUO Bing
Key Laboratory of Universal Wireless Communications, BUPT
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Cui Qimei
Key Laboratory Of Universal Wireless Communications Bupt
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Zhang Ping
Beijing Univ. Posts And Telecommunications Beijing Chn
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Luo Bing
Key Laboratory Of Universal Wireless Communications Bupt
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Wang Hui
Key Laboratory Of Universal Wireless Communications Bupt
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Zhang Ping
Key Lab Of Universal Wireless Communications Ministry Of Education
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