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An effective channel estimation method considering channel response length in OFDM systems  

Jeon Hyoung-Goo (동의대학교 정보통신과/산업기술 연구소)
Choi Won-Chul (ETRI, USN 통신연구팀)
Lee Hyun (ETRI, USN 통신연구팀)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.9A, 2005 , pp. 755-761 More about this Journal
Abstract
In this paper, we proposed a channel estimation method by impulse signal train in OFDM. In order to estimate the channel response, 4 impulse signals are generated and transmitted during one OFDM (Orthogonal Frequency Division Multiplexing) symbol. The intervals between the impulse signals are all equal in time domain. At the receiver, the impulse response signals are summed and averaged. And then, the averaged impulse response signal is zero padded and fast Fourier transformed to obtain the channel estimation. The BER performance of the proposed method is compared with those of conventional estimation method using the long training sequence in fast fading environments. The simulation results show that the proposed method improves by 3 dB in terms of Eb/No, compared with the conventional method.
Keywords
channel-estimation; OFDM; LS-mthod; zero-padding;
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  • Reference
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