Orthogonal frequency division multiplexing (OFDM) systems are sensitive to
frequency errors, which cause intercarrier interference among subcarriers.
A new cancellation method to reduce the effects of frequency offset errors
is presented. The main feature is to map each data symbol a,which is to be
transmitted onto a pair of non-adjacent subcarriers, with weightings +1 and
-1, rather than to a single subcarrier. The carrier-to-interference ratio
gain of the proposed method over normal OFDM varies between 10 to 30dB. Thi
s method also offers a frequency diversity effect in a multipath fading cha
nnel.