i-manager Publications

CFO Estimation in OFDM Systems

Sophia. S*, M. Suganthi**

*Lecturer, Department of ECE., Sri Ramakrishna Engg. College, Coimbatore.

**Asst. Professor, Department of ECE., Thiagarajar College of Engg., Madurai

Periodicity:November - January'2007
DOI : https://doi.org/10.26634/jfet.2.2.873

Abstract

The demand for efficient and reliable high rate communication is ever increasing. In recent years orthogonal frequency division multiplexing (OFDM) has gone from 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).

Keywords

OFDM, CFO,CP.

How to Cite this Article?

Sophia. S and M. Suganthi (2007). CFO Estimation in OFDM Systems. i-manager’s Journal on Future Engineering and Technology, 2(2), 11-16. https://doi.org/10.26634/jfet.2.2.873

References

[1] G. Blom. Probability theory and statistical theory with applications. Studentlitteratur,1989

[2] G. C. Carter. Coherence and time delay estimation. Proc. of the IEEE,75(2):236255, Feb. 1987.

[3] Y. T. Chan, R. V. Richard, and J. B. Plant. The least squares estimation of time delay and its use in signal detection. IEEE Trans. Acoust.,Speech, Signal Processing, ASSP-26:217222, June 1978.

[4] B. Chen and H.Wang. Blind OFDM carrier frequency offset estimation via oversampling. In Conf. Rec. of the Thirty-Fifth Asilomar Conf. On Signals, Systems and Computers, volume 2, pages 14651469, Nov. 2001.

[5] Y.-S. Choi, Peter J. Voltz, and F. A. Cassara. ML estimation of carrier frequency offset for multicarrier signals in rayleigh fading channels.IEEE Trans. Vehicular Technology, 50(2):644655, Mar. 2001.

[6] S. R. Dooley and A. K. Nandi. On explicit time delay estimation using the Farrow structure. Signal Processing, 72:5357, 1999.

[7] C. W. Farrow. A continuously variable digital delay element. In Proc.IEEE Int. Symp. Circuits & Syst., volume 3, pages 26412645, June 79 ,1988.

[8] G. Jacovitti and G. Scarano. Discrete time techniques for time delay estimation. IEEE Trans. on Signal Processing, 41(2), Feb. 1993.

[9] H. Johansson and P. L¨owenborg. On the design of adjustable fractional delay FIR filters. IEEE Trans. on Circuits and Syst. II: Analog and Digital Signal Processing, 50(4):164169, Apr. 2003.

	North Americas,UK, Middle East,Europe		India	Rest of world
	USD	EUR	INR	USD-ROW
Pdf	35	35	200	20
Online	35	35	200	15
Pdf & Online	35	35	400	25

CFO Estimation in OFDM Systems

Abstract

Keywords

How to Cite this Article?

References

If you have access to this article please login to view the article or kindly login to purchase the article

Purchase Instant Access

Options for accessing this content: