Pilot Patterns for OFDM Communication Systems in a Fast Time-Varying Channel

Yeon Ju LIM  Deok Soo HYUN  Sang Kyu PARK  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.1   pp.243-246
Publication Date: 2006/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.1.243
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
pilot patterns,  time-varying channel,  OFDM,  channel estimation,  

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In this letter, we focus on rearranged pilot patterns for channel estimation in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM). The conventional pilot patterns for channel estimation in OFDM systems do not have robust characteristics in time-varying channels. In order to overcome this weakness of the conventional pilot patterns, we propose the pilot patterns with robust mobility for OFDM systems, which can achieve a good error performance in time-varying multi-path fading channels. Simulation results show that the bit error rate (BER) performances of the proposed pilot patterns are better than those of the conventional pilot patterns in fast time-varying fading channels under the same pilot density and data rate.