Performance of MIMOOFDM systems with multi-beamforming based on MMSE

摘要

Multiple-input multiple-output (MMO) - orthogonal frequency division multiplexing (OFDM) with space - time coding (STC) is a promising technology for future wireless communication systems. However, MEVIO-OFDM systems are greatly impaired by large cochannel interference (CCI) from the multiple transmitters. In this paper, we propose pre-fast Fourier transform (FFT) multibeamforming based on MMSE(minimizing the mean squared error) for a MEVIO-OFDM system to preserves the STC diversity and to remove the CCI. The improvement in bit error rate is investigated through computer simulation of a MEVIO-OFDM system in a multipath channel with CCI.