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Polyphase Filtered OFDM Transmission System  

이창수 (한양대 공대 전기공학과)
유경열 (한양대 공대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.53, no.4, 2004 , pp. 286-292 More about this Journal
Abstract
This paper presents a polyphase filtered orthogonal frequency division multiplexing (PF-OFDM) technique. The proposed structure uses a modified discrete Fourier transform (MDFT) transmultiplexer to achieve greater spectral efficiency than an OFDM system, while preserving backward compatibility with it. The prototype PF-OFDM filter has excellent time and frequency localization properties, which matte it possible to eliminate a guard interval (or cyclic prefix) and easily suppress interchannel interference (ICI). This modulation technique uses a single DFT structure, in contrast to a MDFT transmultiplexer, which requires two DFT polyphase filter banks. The PF-OFDM modulation is .justified over multipath Rayleigh fading channels.
Keywords
OFDM; transmultiplexer;
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