A training-based iterative detection/channel estimation scheme for large non-orthogonal STBC MIMO systems

Zaki, A. ; Mohammed, S. K. ; Chockalingam, A. ; Rajan, B. S. (2009) A training-based iterative detection/channel estimation scheme for large non-orthogonal STBC MIMO systems In: 2009 IEEE International Conference on Communications, 14-18 June 2009, Dresden, Germany.

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Official URL: http://ieeexplore.ieee.org/document/5198683/

Related URL: http://dx.doi.org/10.1109/ICC.2009.5198683

Abstract

In this paper, we propose a training-based channel estimation scheme for large non-orthogonal space-time block coded (STBC) MIMO systems. The proposed scheme employs a block transmission strategy where an Nt times Nt pilot matrix is sent (for training purposes) followed by several Nt times Nt square data STBC matrices, where Nt is the number of transmit antennas. At the receiver, we iterate between channel estimation (using an MMSE estimator) and detection (using a low-complexity likelihood ascent search (LAS) detector) till convergence or for a fixed number of iterations. Our simulation results show that excellent bit error rate and nearness-to-capacity performance are achieved by the proposed scheme at low complexities. The fact that we could show such good results for large STBCs (e.g., 16times 16 STBC from cyclic division algebras) operating at spectral efficiencies in excess of 20 bps/Hz (even after accounting for the overheads meant for pilot-based channel estimation and turbo coding) establishes the effectiveness of the proposed scheme.

Item Type:Conference or Workshop Item (Paper)
Source:Copyright of this article belongs to Institute of Electrical and Electronics Engineers.
ID Code:102337
Deposited On:22 Mar 2017 09:28
Last Modified:22 Mar 2017 09:28

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