A Banking Mechanism of Diversity-Multiplexing Tradeoff for Massive MIMO Systems

Conference: European Wireless 2015 - 21th European Wireless Conference
05/20/2015 - 05/22/2015 at Budapest, Hungary

Proceedings: European Wireless 2015

Pages: 6Language: englishTyp: PDF

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Chiang, Tsung-Wei (Graduate Institute of Communication Engineering, National Taiwan University, Taipei, Taiwan)
Lee, Ju-Hong (Department of Electrical Engineering, Graduate Institute of Communication Engineering, and Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan)

Considering how to greatly utilize a large number of antennas in multiple-input-multiple-output (MIMO) systems, we proposed a concept of an antenna bank for the massive MIMO base station. Operating the proposed antenna banking mechanism, mobile receiver terminals can demand the base station to provide an additional and adaptive number of transmitter antennas serving with faster data transmission while their desired outage probability of data rates still can be guaranteed. For the antenna banking mechanism, we provide an analytic formula of the cumulative probability distribution function (CDF) of the instantaneous finite-SNR diversity-multiplexing-tradeoff (DMT). This CDF is used to determine when a receiver terminal needs to request additional spatial diversity gains from the massive MIMO base station. Finally, we present computer simulation results for illustration and discussions to confirm the validity of our analytic CDF formula.