Influence of Channel Estimation Error in a Multiuser TAS/MRC Scheme Subject to Beaulieu-Xie Fading Channels

International Journal of Electrical and Electronics Engineering

© 2025 by SSRG - IJEEE Journal

Volume 12 Issue 9

Year of Publication : 2025

Authors : Amardeep Kumar Thakur, Rajkishur Mudoi, Rupaban Subadar

10.14445/23488379/IJEEE-V12I9P122

How to Cite?

Amardeep Kumar Thakur, Rajkishur Mudoi, Rupaban Subadar, "Influence of Channel Estimation Error in a Multiuser TAS/MRC Scheme Subject to Beaulieu-Xie Fading Channels," SSRG International Journal of Electrical and Electronics Engineering, vol. 12,  no. 9, pp. 215-222, 2025. Crossref, https://doi.org/10.14445/23488379/IJEEE-V12I9P122

Abstract:

The Transmit Antenna Selection incorporating Maximal Ratio Combining (TAS/MRC) strategy is a broadly preferred approach to lessen the intricacy level of a multiuser system incorporating Multiple Input and Multiple Output (MIMO) technique with little degradation in the performance. Reducing RF links upgrades the practical suitability of the TAS/MRC strategy. In TAS/MRC communication, the Channel State Information (CSI) is presented to the transmitter. Depending on the CSI, the best antenna is chosen for transmission, thereby enhancing the system performance. However, due to the existence of dominant factors, namely the channel estimation error and the channel fading, the status of the TAS/MRC system may be reduced significantly. For the evaluation of the TAS/MRC strategy, it is commonly assumed that the lossless and error-free CSI is applied to the base station. However, practically, the CSI has envelope and phase errors; therefore, the error associated with the CSI needs to be applied in the system evaluation. Likewise, the functioning of the MRC receiver is influenced noticeably by the channel fading conditions. In this paper, a TAS/MRC scheme associated with multiple users has been analyzed. The channel estimation error and Beaulieu-Xie fading model are utilized for the mathematical evaluation of the system. In the reality of channel estimation error, the outage probability, ABER with BPSK as well as DBPSK modulations, and ergodic capacity have been derived and analyzed. It can be noticed that little envelope errors in CSI may deteriorate the status of the system to a large extent when compared with the error in the phase of the CSI. Simulated points are included in the figures to validate the data.

Keywords:

Beaulieu-Xie fading, DBPSK, Ergodic capacity, Multiuser MIMO, CSI, TAS/MRC.

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