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Performance Evaluation of Channel Shortening Time Domain Equalizer in Wireless LAN Environment  

Yoon Seok-Hyun (단국대학교 전기전자컴퓨터공학부)
Yu Hee-Jung (한국전자통신연구원)
Lee Il-Gu (한국전자통신연구원)
Jeon Tae-Hyun (서울산업대학교)
Lee Sok-Kyu (한국전자통신연구원)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.3A, 2006 , pp. 240-248 More about this Journal
Abstract
In this paper, we consider an OFDM receiver algorithm design for IEEE 802.11a/p system, which targeting large coverage area while keeping the transmission format unchanged. Particularly, taking into account the inter-symbol interference(ISI) and inter-carrier interference(ICI) that can be induced with large RMS delay spread, we employ channel shortening time-domain equalizer(TEQ) and evaluate the receiver performance in terms of SINR and packet error rate(PER). The preamble defined in IEEE802.11a/p is used to estimated the initial equalizer tap coefficients. Primary purpose of the paper is to give an answer to the question, though partially, whether or not 16-QAM constellation can be used in none line of sight environment at the boundary of a large coverage area. To this end, we first analyze the required TEQ parameters for the target channel environment and then perform simulation for PER performance evaluation in a generic frequency selective fading channel with exponential power-delay profile.
Keywords
OFDM; TEQ;
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