Channel Estimation for OFDM Systems with Transparent Multi-Hop Relays

Kyung-Soo WOO  Hyun-Il YOO  Yeong-Jun KIM  Kyu-In LEE  Chang-Hwan PARK  Heesoo LEE  Hyun-Kyu CHUNG  Yong-Soo CHO  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.6   pp.1555-1558
Publication Date: 2007/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.6.1555
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
multi-hop relays,  propagation delay,  OFDM,  LS channel estimation,  cooperative diversity,  

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Summary: 
In this letter, the effect of a propagation delay resulting from the use of an OFDM system with a transparent mobile multi-hop relay (MMR) is initially analyzed. Then, a least square (LS) channel estimation technique for the OFDM system with throughput enhancement (TE) MMR or cooperative MMR is proposed. It is demonstrated by computer simulation that the proposed LS channel estimation technique for OFDM systems with transparent MMR is superior to the conventional technique in terms of mean square error (MSE) and bit error rate (BER).