A near-optimal antenna selection in MIMO system by using maximum total eigenmode gains

In this paper, we propose the computation-effective and capacity-near-optimal Maximum Total Eigenmode Gains (MTEG) principle for the transmit antenna selection in the MIMO downlink of a cellular communication system. An Equivalent Channel Matrix (ECM) is proposed to characterize the quasistatic MIMO channel with Rayleigh fading, the co-channel interference, and the Additive White Gaussian Noise. In accordance with MTEG principle, we prove the transmit antennas should be selected according to the descending order of the norms of their corresponding column vectors in ECM. By numerical examples, we verify the capacity efficiency of the proposed scheme. It is shown that although the least computation complexity is required by MTEG scheme, it provides larger capacity than other existing simplified near-optimal antenna selection scheme and is more close to the optimal exhaustive search in capacity achievements.