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

• Jianxin Dai,
• Shuai Liu,
• Ming Chen,
• Jun Zhou,
• Jie Qi,
• Jingwei Liang,

Vol. 8, No. 5, May 28, 2014
10.3837/tiis.2014.05.009, Download Paper (Free):

• Coordinated Multi-Point
• Net Ergodic Capacity
• Coordinated set Planning
• dividing-bit factor
• Robust Design

Abstract

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.

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