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Statistical-mechanical analysis of multiuser channel capacity with imperfect channel state information
Authors:Wang Hui-Song and Zeng Gui-Hua
Institution:The State Key Laboratory on Fiber-Optical Local Area Networks and Advanced Optical Communication Systems, Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200030, China
Abstract:In this paper, the effect of imperfect channel state information at the receiver, which is caused by noise and other interference, on the multi-access channel capacity is analysed through a statistical-mechanical approach. Replica analyses focus on analytically studying how the minimum mean square error (MMSE) channel estimation error appears in a multiuser channel capacity formula. And the relevant mathematical expressions are derived. At the same time, numerical simulation results are demonstrated to validate the Replica analyses. The simulation results show how the system parameters, such as channel estimation error, system load and signal-to-noise ratio, affect the channel capacity.
Keywords:statistical mechanics  channel capacity  minimum mean square error channel estimation  code division multiple access(CDMA)
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