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ThinkMind // ACCESS 2012, The Third International Conference on Access Networks // View article access_2012_3_20_40025


A Novel MIMO-OFDM Scheme Based on Modulation Diversity for IEEE 802.11ac Standard

Authors:
Zhanji Wu
Xiang Gao
Yunzhoun Li

Keywords: WLAN; 802.11ac; modulation diversity; MIMO; OFDM

Abstract:
Wireless communications always strive for higher throughput and higher performance. The Multiple Inputs Multiple Outputs (MIMO)- Orthogonal Frequency Division Multiplexing (OFDM) scheme is the key Physical (PHY) layer feature of the next generation wireless local area networks (WLAN) IEEE 802.11ac standards. In this paper, we propose a novel MIMO-OFDM scheme based on modulation diversity for IEEE 802.11ac. This proposed scheme jointly optimizes the MIMO-OFDM and modulation diversity together, which makes full use of time diversity, frequency diversity and space diversity. It exhibits high spectral efficiency and low error rate in fading channels. The simulation results show that the proposed scheme outperforms the current MIMO-OFDM scheme based on Bit-Interleaved Coded Modulation (BICM) in the 802.11ac standard, which is up to 7dB SNR gain.

Pages: 53 to 58

Copyright: Copyright (c) IARIA, 2012

Publication date: June 24, 2012

Published in: conference

ISSN: 2308-4049

ISBN: 978-1-61208-205-9

Location: Venice, Italy

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

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