Filtered OFDM/OQAM transmission system

Abstract

Telecom Paris -ENST 46, rue barrault 75634 PARIS -FRANCE, Phone. +33 1 45 81 76 80 Fax: +33 1 45 89 00 20Abslrcrcf-In this article we consider B computationally efficient FFT-based technique for the design of pulse shaping filters with arbitrary length and overlapping factors, for OFDM system. We implemented an OFDWOQAM transmission system based an shapingalten.The carrier spacing is carefully selected so that the carriers are spectrally orthogonal-and the receiver can separate them. In tbis way, spectral overlapping among sub-cm'ers is allowed and a spectral effiaency higher then ordinary frequency division multiplexing is achieved. In addition, the implementation of OFDM is simple and very efficient because 01 the use of FFT algoritbm and Polyphase filtering.Index Terms-OFDWOQAM, polyphase filters, spectral et%dency.

OFDM signals based on shaping filters

“…A similar development to FMT will lead to an efficient implementation using IDFT and DFT similarly to non-staggered FMT. See [7]. So far we focus on efficient generation and reception of OFDM signals.…”