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Channel Estimation in Comb-Type Pilot Arrangements for OFDM Systems with Null Subcarriers
Jihyung KIM Sangho NAM Daesik HONG
IEICE TRANSACTIONS on Communications
Publication Date: 2006/12/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
channel estimation, time-domain ML estimation, null subcarriers, OFDM,
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This letter analyzes the degradation effect of null subcarriers in orthogonal frequency domain multiplexing (OFDM) systems on the time-domain maximum likelihood (ML) estimation performance. The analysis is used as the basis for a proposal for a channel estimation method that can overcome performance degradation caused by null subcarriers. The accuracy of the proposed method is confirmed by the numerical analysis.