An effecient algorithm has been proposed by

Schmidl and Cox for carrier frequency estimation in orthogonal

frequency-division multiplexing systems. The scheme is based

on the transmission of a training symbol composed of two

identical halves in the time domain. In this paper we extend

this algorithm by considering a training symbol composed of

L>2 identical parts. This makes it possible to achieve a better

accuracy at the cost of some increase in computational load. The

estimation range can be made as large as desired without the

need of a second training symbol, as required by the Schmidl

and Cox method.