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Conference Paper
Channel Estimation Based on Comb-Type Pilot Structure in OFDM System with Null Subcarriers
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- Authors
- Ji Hyung Kim, Dong Seung Kwon, Sang Ho Nam, Dae Sik Hong
- Issue Date
- 2007-09
- Citation
- Vehicular Technology Conference (VTC) 2007 (Fall), pp.1092-1096
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper analyzes the degradation effect of null subcarriers in orthogonal frequency division multiplexing (OFDM) systems on the time-domain maximum likelihood (ML) estimation performance. The analysis is used as the basis for a proposal for a new channel estimation method that can overcome performance degradation caused by null subcarriers. The accuracy of the proposed channel estimation is guaranteed by using an interpolation of the estimated channel in the frequency domain that comes before the channel estimation in the time domain. © 2007 IEEE.
- KSP Keywords
- Channel estimation(CE), Comb-type, Degradation effect, Estimation method, Maximum likelihood (ML) estimation, OFDM systems, Orthogonal frequency division Multiplexing(OFDM), estimation performance, frequency domain(FD), null subcarriers, performance degradation