JFET_V2_N2_A1 Sophia S. M. Suganthi Journal on Future Engineering and Technology 2230 – 7184 2 2 11 16 OFDM, CFO,CP The demand for efficient and reliable high rate communication is ever increasing.In recent years orthogonal frequency division multiplexing (OFDM) has undergone a promising data transmission technique. In this paper we present a technique for carrier frequency offsets (CFOs) estimation in OFDM systems that is based on locating the spectral minimas within so-called null or virtual subcarriers embedded in the spectrum. The spectral minimas are found iteratively over a number of symbols and is therefore mainly useful for frequency offset tracking or in systems where an estimate is not immediately required. A goal for many years has been to be able to implement as much as possible of a radio system in the digital domain, the ultimate goal being so called software defined radio (SDR). November 2006 - January 2007 Copyright © 2007 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=873