Performance of power controlled MIMO-OFDM systems with multibeamformer 
Chan Kyu Kim
Electronic Devices, Vol. 6, No. 1, 2017.
DOI: 
Link: http://www.dline.info/ed/fulltext/v6n1/edv6n1_3.pdf
Abstract:
In this paper, we propose the new technique adopting power control to MIMO(multi-input multi-output)-OFDM(orthogonal frequency division multiplexing)
system with multi-beamformer. Through the proposed technique, we can iteratively control the transmitting power and update the weight of beamformer 
simultaneously. Therefore, the beam is formed toward the desired direction and the SNIR at each subcarrier become the target SNIR. And the performance
of MIMO-OFDM system is very improved. The improvement in bit error rate is investigated through computer simulation of a MIMO-OFDM system with the 
proposed approach.