Improvement of the Decision-Directed Frequency Tracking Algorithm for OFDM Systems

Author

Zheng, Laibo ; Cao, Yewen

Author_Institution

Inf. Sci. & Eng. Sch., Shandong Univ., Jinan

Volume

1

fYear

2009

fDate

6-8 Jan. 2009

Firstpage

293

Lastpage

297

Abstract

In this paper, we first analyze a kind of decision-directed frequency tracking algorithm for OFDM systems, and the approximation in derivation of the estimation result, and then we propose an iterative algorithm. In most cases, the frequency offset can be estimated and compensated within one OFDM symbol by using the iterative algorithm. This results in a shortened convergence time. The cramer-rao low band for the algorithm is derived too, and the simulation results show that the estimation results are close to the cramer-rao low band.

Keywords

OFDM modulation; iterative methods; Cramer-Rao low band; OFDM systems; decision-directed frequency tracking algorithm; frequency offset; iterative algorithm; Algorithm design and analysis; Approximation algorithms; Computational complexity; Convergence; Frequency estimation; Frequency synchronization; Intersymbol interference; Iterative algorithms; OFDM; Peak to average power ratio; Cramer-Rao Low Band; Decision-Directed; Frequency Tracking; OFDM Systems; iterative algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Mobile Computing, 2009. CMC '09. WRI International Conference on

Conference_Location

Yunnan

Print_ISBN

978-0-7695-3501-2

Type

conf

DOI

10.1109/CMC.2009.175

Filename

4797004