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Adaptive Cooperation Switching for Multicell Downlink Using Statistical CSI
Jun ZHANG Shi JIN Xiqi GAO Kai-Kit WONG
IEICE TRANSACTIONS on Communications
Publication Date: 2012/02/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
cooperation, ergodic capacity, MIMO, statistical CSI,
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This letter proposes an adaptive scheme that switches between cooperative and non-cooperative transmission for multicell downlink systems in Kronecker spatially correlated channels, which exploits statistical channel state information (CSI). Based on the received signal-to-noise ratios (SNRs) and a cooperation metric, we propose a simple base station (BS) association method and then derive low-SNR capacity approximations for both cooperative and non-cooperative systems. Using the results, we provide a low-complexity efficient cooperation switching method to enhance the system capacity. Results show that the proposed method is more efficient than the conventional method to search the switching point.