On Regularization Parameter for Block Diagonalization with Limited Feedback

초록

In downlink multiple antenna systems, the performance of block diagonalization is improved by using an appropriate regularization parameter. The optimal value of the parameter can be obtained by an explicit form if the transmitter has a perfect channel state information. However, with limited feedback, the regularization parameter should be shifted reflecting the effect of the multiuser interference. This study investigates the behavior of the regularization parameter with limited feedback, when the number of receive antennas is greater than one. © 2021, Korean Institute of Communications and Information Sciences. All rights reserved.

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