Antenna Selection Training in MIMO-OFDM/OFDMA Cellular Systems

Mehta, Neelesh B and Molisch, Andreas F and Zhang, Jinyun and Bala, Erdem (2008) Antenna Selection Training in MIMO-OFDM/OFDMA Cellular Systems. In: 2nd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, 2007. CAMPSAP 2007., 12-14 Dec. 2007, Thomas, VI .

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Abstract

Antenna selection allows multiple-antenna systems to achieve most of their promised diversity gain, while keeping the number of RF chains and, thus, cost/complexity low. In this paper we investigate antenna selection for fourth-generation OFDMA- based cellular communications systems, in particular, 3GPP LTE (long-term evolution) systems. We propose a training method for antenna selection that is especially suitable for OFDMA. By means of simulation, we evaluate the SNR-gain that can be achieved with our design. We find that the performance depends on the bandwidth assigned to each user, the scheduling method (round-robin or frequency-domain scheduling), and the Doppler spread. Furthermore, the signal-to-noise ratio of the training sequence plays a critical role. Typical SNR gains are around 2 dB, with larger values obtainable in certain circumstances.

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	13 Oct 2011 08:59
Last Modified:	13 Oct 2011 08:59
URI:	http://eprints.iisc.ac.in/id/eprint/41376

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