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ThinkMind // ICWMC 2012, The Eighth International Conference on Wireless and Mobile Communications // View article icwmc_2012_11_20_20379


Different Criteria of Selection for Quantized Feedback of Minimum-Distance Based MIMO Precoder

Authors:
Ancuta Moldovan
Ghadir Madi
Baptiste Vrigneau
Tudor Palade
Rodolphe Vauzelle

Keywords: channel state information; limited feedback; MIMO precoders; precoder selection

Abstract:
The achievable performance of a multi-antenna communication system relies on the amount of information describing the channel available at the transmitter and at the receiver. In this paper, we propose different criteria for selecting the optimal precoding matrix from the codebook, in a limited feedback spatial multiplexing system. The distortion function considered to design the codebook aims to maximize the minimum Euclidean distance between signal points at the receiver side. The proposed approaches are compared considering the bit error rate performance, under the constraint of preserving the same rate on the feedback channel. Since the signal adaptation must be performed in real-time, the computational complexity involved in performing the selection is also evaluated for each method. The simulation results show that the proposed solutions are promising methods for quantization, as they ensure very small loss compared to the ideal case.

Pages: 254 to 258

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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