Volume 13, Issue 3, November 2015, Pages 734–741
Bhupinder Singh1 and Amit Kumar Kohli2
1 Electronics and Communication Engineering Department, Thapar University, Patiala, Punjab, India
2 Electronics and Communication Engineering Department, Thapar University, Patiala, Punjab, India
Original language: English
Copyright © 2015 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
This paper presents a comparison between Eigen value decomposition (EVD) method and Givens rotation (GR) method for the quasi-orthogonal space-time block coded (QO-STBC) wireless communication systems, working under the multipath Rayleigh fading channels, under the condition of imperfect channel state information (CSI) at the receiver side, and also presents the multi-input and multi-output (MIMO) extension of both the QO-STBC methods. The matrix manipulation in both schemes leads to the removal of interference terms in the detection matrix, which in turn results in reduced computational complexity as compared to the conventional linear decoding technique using maximum likelihood criterion. Under realistic conditions the channel estimator cannot provide perfect/ideal channel state information (CSI). In this correspondence, we describe the impact of imperfect channel state information on the diversity gain. The simulation results are presented to demonstrate the adverse effects of imperfect channel state information (CSI) on the bit error rate performance of QO-STBC systems.
Author Keywords: Space-time block code, channel state information (CSI), Eigen value decomposition (EVD), Givens rotation (GR), signal-to-noise ratio (SNR).
Bhupinder Singh1 and Amit Kumar Kohli2
1 Electronics and Communication Engineering Department, Thapar University, Patiala, Punjab, India
2 Electronics and Communication Engineering Department, Thapar University, Patiala, Punjab, India
Original language: English
Copyright © 2015 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
This paper presents a comparison between Eigen value decomposition (EVD) method and Givens rotation (GR) method for the quasi-orthogonal space-time block coded (QO-STBC) wireless communication systems, working under the multipath Rayleigh fading channels, under the condition of imperfect channel state information (CSI) at the receiver side, and also presents the multi-input and multi-output (MIMO) extension of both the QO-STBC methods. The matrix manipulation in both schemes leads to the removal of interference terms in the detection matrix, which in turn results in reduced computational complexity as compared to the conventional linear decoding technique using maximum likelihood criterion. Under realistic conditions the channel estimator cannot provide perfect/ideal channel state information (CSI). In this correspondence, we describe the impact of imperfect channel state information on the diversity gain. The simulation results are presented to demonstrate the adverse effects of imperfect channel state information (CSI) on the bit error rate performance of QO-STBC systems.
Author Keywords: Space-time block code, channel state information (CSI), Eigen value decomposition (EVD), Givens rotation (GR), signal-to-noise ratio (SNR).
How to Cite this Article
Bhupinder Singh and Amit Kumar Kohli, “Linear Decoding of QO-STBC under Imperfect Channel Estimation Conditions,” International Journal of Innovation and Applied Studies, vol. 13, no. 3, pp. 734–741, November 2015.
