JICCE (한국정보통신학회)
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| 한글제목(Korean Title) |
Analysis of the Effect of Coherence Bandwidth on Leakage Suppression Methods for OFDM Channel Estimation |
| 영문제목(English Title) |
Analysis of the Effect of Coherence Bandwidth on Leakage Suppression Methods for OFDM Channel Estimation |
| 저자(Author) |
Junhui Zhao
Ran Rong
Chang-Heon Oh
Jeongwook Seo
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| 원문수록처(Citation) |
VOL 12 NO. 04 PP. 0221 ~ 0227 (2014. 12) |
한글내용
(Korean Abstract) |
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영문내용
(English Abstract) |
In this paper, we analyze the effect of the coherence bandwidth of wireless channels on leakage suppression methods for discrete Fourier transform (DFT)-based channel estimation in orthogonal frequency division multiplexing (OFDM) systems. Virtual carriers in an OFDM symbol cause orthogonality loss in DFT-based channel estimation, which is referred to as the leakage problem. In order to solve the leakage problem, optimal and suboptimal methods have already been proposed. However, according to our analysis, the performance of these methods highly depends on the coherence bandwidth of wireless channels. If some of the estimated channel frequency responses are placed outside the coherence bandwidth, a channel estimation error occurs and the entire performance worsens in spite of a high signal-to-noise ratio.
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| 키워드(Keyword) |
Coherence bandwidth
DFT-based channel estimation
Leakage
OFDM
Wireless channel
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| 파일첨부 |
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