ISSN : 1796-2021
Volume : 4    Issue : 1    Date : February 2009

An Analysis of the EIC Method for OFDM/OQAM Systems
Hao Lin, Pierre Siohan, Philippe Tanguy, and Jean-Philippe Javaudin
Page(s): 52-60
Full Text:
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OFDM/OQAM is a multi-carrier modulation scheme that, differently from conventional OFDM, does
not require any guard interval. Indeed, the interference that results from a transmission over time
and/or frequency selective channels can be partly contained if the pulse shape has been
appropriately selected. Nevertheless, for certain transmission conditions, a simple zero-forcing (ZF)
equalization is not enough to cancel this interference. In this paper, we propose an Equalization with
Interference Cancellation (EIC) to counteract the performance floor that characterizes OFDM/OQAM
systems using a simple ZF equalization. The basic principle rests on an accurate computation of
the interference term taking into account the channel and the prototype filter coefficients. The
simulation results illustrate the efficiency of the EIC method.

Index Terms
OFDM, OFDM/OQAM, equalization