Synchronization and Channel Estimation in Cyclic Postfix based OFDM System

We propose a new cyclic postfix based orthogonal frequency division multiplexing (OFDM) system. The proposed system shows a superior performance in a symbol time synchronization while achieving a comparable channel estimation performance as compared to a conventional cyclic prefix based OFDM system....

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Bibliographic Details
Main Authors: Jongkyung Kim, Sangjin Lee, Jongsoo Seo
Format: Conference Proceeding
Language:English
Subjects:
Channel estimation
Digital video broadcasting
Fast Fourier transforms
Frequency domain analysis
Frequency synchronization
Local area networks
OFDM
Robustness
Time domain analysis
Wireless LAN
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Summary:We propose a new cyclic postfix based orthogonal frequency division multiplexing (OFDM) system. The proposed system shows a superior performance in a symbol time synchronization while achieving a comparable channel estimation performance as compared to a conventional cyclic prefix based OFDM system. In the proposed system, an identical postfix is generated at the end of each OFDM symbol by inserting pilot values amongst the data symbols in a frequency domain and performing inverse fast Fourier transform (IFFT) operation on it. Robust time synchronization is achieved by auto-and cross-correlating the postfix. Also, time or frequency domain channel estimation can be realized by using properly designed postfix according to channel estimation method
ISSN:1550-2252
DOI:10.1109/VETECS.2006.1683202