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Universal BER performance ordering of MIMO systems over flat channels Ohno, Shuichi Ohno Shuichi Teo, Kok Ann Donny Teo Kok Ann Donny open access Copyright(c) 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. BER MIMO equalization 540 We present universal BER performance ordering for different antenna sizes in Multiple-Input Multiple-Output (MIMO) wireless systems with zero-forcing (ZF) equalization, which hold for all SNR. We first show that when the number of transmit antennas is fixed, BER of each symbol degrades with a decrease in the number of receive antennas even if the received SNR is kept constant. Then, we prove that when the number of receive antennas is fixed, the average BER improves with a decrease in the number of transmit antennas, which shows the tradeoff between BER and bandwidth efficiency in MIMO with ZF equalization. Furthermore, discussions on the relation of BER with the same change in the number of receive and transmit antennas show that there is no universal order in BER for any particular channel. These highlight the advantage and the limit of MIMO with ZF equalization. IEE-Inst Electrical Electronics Engineers Inc 2007-10 eng journal article VoR https://hiroshima.repo.nii.ac.jp/records/2007033 10.1109/TWC.2007.060064 http://dx.doi.org/10.1109/TWC.2007.060064 1536-1276 AA1159694X IEEE Transactions on Wireless Communications IEEE Transactions on Wireless Communications 6 10 3678 3678 3687 https://hiroshima.repo.nii.ac.jp/record/2007033/files/IEEETransWireless_6_3678.pdf 467.7 KB