Performance analysis for multiple‐input multiple‐output‐maximum ratio transmission systems with channel estimation error, feedback delay and co‐channel interference

Abstract

In this study, the authors analyse the impact of channel estimation error (CEE), feedback delay (FD), and co-channel interference (CCI) on the performance of multiple-input multiple-output (MIMO) systems deploying maximum ratio transmission (MRT). In particular, the authors derive closed-form expressions for the ergodic capacity and the symbol error rate (SER) as well as the outage probability (OP). In addition, to reveal the effect of CEE, FD and CCI on the MIMO-MRT system, the authors adopt more simplified and tractable formulas in terms of asymptotic expressions for the ergodic capacity, SER and OP. The analysis shows that the system performance is degraded considerably under imperfect transmission conditions such as CEE, FD and CCI. However, the authors can compensate part of this degradation by deploying MRT transmission with a large number of antennas at the transmitter and receiver. Finally, the selected examples exhibit consistency between analytical results and Monte Carlo simulations.

Performance Analysis of MIMO MRC Systems With Feedback Delay and Channel Estimation Error

“…Compared with (2), it can be found that the error term due to the imperfect CSI is added in the output signal. Since the error term can be demodulated with envelope detection [20], it should be treated as signal as in [17] rather than the noise or interference as in [14]- [16]. As a result, after the necessary computations, the output SNR at the receiver can be expressed as…”

“…In [15], the authors have studied the performance of MIMO wireless communications with transmit BF and receive MRC in the presence of channel estimation error and co-channel interferences. Furthermore, the joint impacts of channel estimation error, feedback delay and co-channel interference on the performance of MIMO systems employing MRT has been examined in [16]. It is worth-mentioning that the error term due to imperfect CSI is treated as noise or interference in [14]- [16].…”

“…Furthermore, the joint impacts of channel estimation error, feedback delay and co-channel interference on the performance of MIMO systems employing MRT has been examined in [16]. It is worth-mentioning that the error term due to imperfect CSI is treated as noise or interference in [14]- [16]. This treatment is not highly efficient, since the error term can be demodulated via envelope detection in practical wireless systems, and thus can be used to enhance the output signal power [20].…”

The performance of MIMO system using MRT scheme in vehicular systems

“…MIMO systems that employ both the MRT and the receive antenna selection are studied in the study of Coskun and Kucur by using Nakagami‐ m distribution. In the study of Chu, Duong, and Zepernick, the authors analyze the delay in feedback and co‐channel interference and the impact of the channel estimation error on the performance of MIMO systems employing MRT. In the study of Parfait, Kuang, and Jerry, the performance of zero‐forcing in MRT system is analyzed and compared in a downlink massive MIMO system.…”