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International Workshop on Information and Electronics Engineering (IWIEE) / International Conference on Information, Computing and Telecommunications (ICICT)

作者： Yang, Linchao Tian, Ricai Jia, Min Li, Feng Harbin Inst Technol Commun Res Ctr Harbin 150080 Heilongjiang Peoples R China

Orthogonal frequency division multiplexing (OFDM) is a transmission technique that is based on many orthogonal carriers that are transmitted simultaneously. OFDM effectively mitigates inter symbol interference (ISI) and has high-efficient frequency utilization. OFDM channel estimation is one of the key technologies in the OFDM system. In this paper, channel estimation techniques for OFDM systems, based on pilot-aided channel estimation algorithm, over mountain wireless environment are investigated. It is well known that least square (ls) and linear minimum mean square error (LMMSE) algorithms are effectual channel estimation methods for OFDM. We propose a novel modified ls channel estimation method, which is based on noise reduction procedure to improve the channel estimation accuracy. The simulation results demonstrate that comparing to ls channel estimation algorithm, LMMSE algorithm and the proposed modified ls algorithm provide better performances. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Harbin University of Science and Technology

关键词： mountain wireless environment OFDM channel estimation algorithm modified ls algorithm

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A modified ls Channel Estimation algorithm for OFDM System in Mountain Wireless Environment

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Procedia Engineering 2012年 29卷 2732-2736页

作者： Linchao Yang Ricai Tian Min Jia Feng Li Communication Research Centre Harbin Institute of Technology Harbin Heilongjiang China 150080

关键词： mountain wireless environment OFDM channel estimation algorithm modified ls algorithm

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A New Class of Z-Complementary Pairs and Their Application in Channel Estimation for Mountainous Terrain 10

A New Class of Z-Complementary Pairs and Their Application i...

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10th International Workshop on Signal Design and its Applications in Communications (IWSDA)

作者： Xiang, Yangjie Gu, Zhi Adhikary, Avik Ranjan Ren, Ruibin Southwest Jiaotong Univ Sch Informat Sci & Technol Chengdu Peoples R China Southwest Jiaotong Univ Sch Math Chengdu Peoples R China

ISBN: (数字)9781665452984

ISBN: (纸本)9781665452984

Mountaionus terrain with moderate-to-heavy tree densities generally falls under maximum path loss category, during signal strength prediction and simulation in macrocellular environment. Traditional path loss models like Hata-Okumura model etc. are not suitable for hilly terrain with moderate-to-heavy tree densities. Recently, replecating the actual terrain scenarios, various Stanford University interim (SUI) channel models are proposed. The contribution of this work are two fold. First, we propose a modified least square (ls) algorithm which can efficiently estimate the channel model SUI-6. Secondly, to satisfy the required conditions of the proposed modified ls algorithm, we propose a new class of Z-complementary pairs (ZCPs). Numerical simulations ensure the efficacy of the proposed ZCPs under modified ls algorithm.

关键词： Channel estimation algorithm hilly terrain modified ls algorithm Stanford University interim (SUI) channel models Z-complementary pairs (ZCPs)

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