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Title: OSTBC transmission in MIMO AF relay systems with keyhole and spatial correlation effects
Authors: Duong, T.Q.
Suraweera, H.A. 
Tsiftsis, T.A.
Zepernick, H.-J.
Nallanathan, A.
Issue Date: 2011
Citation: Duong, T.Q.,Suraweera, H.A.,Tsiftsis, T.A.,Zepernick, H.-J.,Nallanathan, A. (2011). OSTBC transmission in MIMO AF relay systems with keyhole and spatial correlation effects. IEEE International Conference on Communications : -. ScholarBank@NUS Repository.
Abstract: In this paper, we investigate the degenerative effects of antenna correlation and keyhole on the performance of multiple-input multiple-output (MIMO) amplify-and-forward (AF) relay networks. In particular, we considered a downlink MIMO AF relay system consisting of an nS-antenna base station S, an nR-antenna relay station R, and an n D-antenna mobile station D, in which the signal propagation originated from the mobile station suffers from keyhole and spatial correlation effects. We have derived a closed-form expression for the exact moment generation function of the instantaneous signal-to-noise ratio which enables us to analyze the symbol error probability and outage probability of the considered system. We have shown that although the mobile station is in a poor scattering environment, i.e., keyhole, the relay channel (S → R → D link) still achieves a cooperative diversity order of min(nR, nD) provided that the channel from the source (S → R link) is keyhole-free. This result is important for the radio system designers since under such a severe scenario it is unnecessary to deploy a large number of antennas on the relay station (nR) but only requires nR = nD to obtain the maximum achievable diversity gain. © 2011 IEEE.
Source Title: IEEE International Conference on Communications
ISBN: 9781612842332
ISSN: 05361486
DOI: 10.1109/icc.2011.5963230
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