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ThinkMind // ICWMC 2012, The Eighth International Conference on Wireless and Mobile Communications // View article icwmc_2012_6_40_2060022


Reduced Complexity Algorithm for Quantized Equal Gain Transmission Codebook over Closed Loop MIMO Systems

Authors:
Noe Yoon Park
Xun Li
Young Ju Kim

Keywords: Closed-loop MIMO; Limited feedback; Grouping; Grassmannian beamforming

Abstract:
In this paper, a novel index search algorithm is proposed for quantized equal gain transmission (QEGT) codebook based closed-loop multiple-input multiple-output systems. The codewords are grouped into a small number of categories by utilizing Grassmannian beamforming criterion. Then, the optimal centroid is selected within those of the groups, which maximizes the signal-to-noise ratio or capacity criterion. Hereby, the optimal index of QEGT codebook is determined within the group of the selected centroid. Monte-Carlo simulations are presented to show that the codebook index search complexity is halved, whilst maintaining almost the same throughput.

Pages: 135 to 140

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-203-5

Location: Venice, Italy

Dates: from June 24, 2012 to June 29, 2012

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