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Channel estimation at the transmitter in a reciprocal MIMO spatial multiplexing system

Bharath, BN and Murthy, Chandra R (2012) Channel estimation at the transmitter in a reciprocal MIMO spatial multiplexing system. In: 2012 National Conference on Communications (NCC), 3-5 Feb. 2012, Kharagpur, India.

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Official URL: http://dx.doi.org/10.1109/NCC.2012.6176862

Abstract

This paper considers the problem of channel estimation at the transmitter in a spatial multiplexing-based Time Division Duplex (TDD) Multiple Input Multiple Output (MIMO) system with perfect CSIR. A novel channel-dependent Reverse Channel Training (RCT) sequence is proposed, using which the transmitter estimates the beamforming vectors for forward link data transmission. This training sequence is designed based on the following two metrics: (i) a capacity lower bound, and (ii) the mean square error in the estimate. The performance of the proposed training scheme is analyzed and is shown to significantly outperform the conventional orthogonal RCT sequence. Also, in the case where the transmitter uses water-filling power allocation for data transmission, a novel RCT sequence is proposed and optimized with respect to the MSE in estimating the transmit covariance matrix.

Item Type: Conference Paper
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Additional Information: Copyright of this article belongs to IEEE.
Keywords: Channel Estimation; Training Sequence; Mean Square Error; Reciprocal MIMO System
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 27 Jan 2014 06:35
Last Modified: 27 Jan 2014 07:57
URI: http://eprints.iisc.ernet.in/id/eprint/48245

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