Robust Design of Coordinated Set Planning with the Non-Ideal Channel

In practical wireless systems, the erroneous channel state information (CSI) sometimes deteriorates the performance drastically. This paper focuses on robust design of coordinated set planning of coordinated multi-point (CoMP) transmission, with respect to the feedback delay and link error. The non-...

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Bibliographic Details
Published in:KSII transactions on Internet and information systems 2014-05, Vol.8 (5), p.1654-1675
Main Authors: Dai, Jianxin, Liu, Shuai, Chen, Ming, Zhou, Jun, Qi, Jie, Liang, Jingwei
Format: Article
Language:Korean
Subjects:
Coordinated Multi-Point
Coordinated set Planning
dividing-bit factor
Net Ergodic Capacity
Robust Design
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Summary:In practical wireless systems, the erroneous channel state information (CSI) sometimes deteriorates the performance drastically. This paper focuses on robust design of coordinated set planning of coordinated multi-point (CoMP) transmission, with respect to the feedback delay and link error. The non-ideal channel models involving various uncertainty conditions are given. After defining a penalty factor, the robust net ergodic capacity optimization problem is derived, whose variables to be optimized are the number of coordinated base stations (BSs) and the divided area`s radius. By the maximum minimum criterion, upper and lower bounds of the robust capacity are investigated. A practical scheme is proposed to determine the optimal number of cooperative BSs. The simulation results indicate that the robust design based on maxmin principle is better than other precoding schemes. The gap between two bounds gets smaller as transmission power increases. Besides, as the large scale fading is higher or the channel is less reliable, the number of the cooperated BSs shall be greater.
ISSN:1976-7277
1976-7277