Effect of Transceiver Impairments on the Capacity of Correlated MIMO Channel in LTE Systems

Abstract

In this paper, the effect of transceiver impairment on the capacity of the MIMO system is studied. Different from the conventional knowledge that the correlation among antenna elements degrade the system performance, this paper proposes an algorithm that simulates the capacity of the correlated MIMO channel that suffers from Rayleigh flat fading with the presence of a physical transmitter and physical receiver. We also assume that the channel state information at the receiver (CSIR) is available. Also, this work will be devoted to long-term evolution systems (LTE). The simulation process of the proposed algorithm is manipulated by MATLAB software with 10000 realizations of the channel. Each realization of the channel is generated randomly. The transceiver impairment levels (k) used in the simulation are 0.08 and 0.175. The simulation results of the proposed algorithm showed that the capacity of the correlated MIMO channel with the presence of a physical transmitter and physical receiver is stopped growing at a particular value in the high SNR regime, which is called the capacity limit. Also, the results showed that the correlation coefficient has an influential role in determining the value of the capacity limit. These results contradicted the results of the traditional MIMO system, in which the traditional MIMO channel capacity grows infinitely at the high-SNRs regime.