A Residual Frequency Offset Synchronization Scheme Using a Simplified CORDIC Algorithm in OFDM Systems

Author

Han, Jae-Woong ; Jang, Young-Beom

Author_Institution

Dept. of Comput. Inf. & Telecommun. Eng., Sangmyung Univ., Seoul

fYear

2009

fDate

4-7 Feb. 2009

Firstpage

67

Lastpage

70

Abstract

In this paper, a residual frequency offset (RFO) synchronization scheme using a simplified coordinate rotation digital computer (CORDIC) algorithm is proposed for orthogonal frequency division multiplexing (OFDM) systems. The RFO synchronization scheme using a conventional CORDIC algorithm uses the vector-mode CORDIC for RFO estimation, and the rotation-mode CORDIC for RFO compensation. The proposed scheme also uses the vector-mode CORDIC for RFO estimation. However, for RFO compensation, the proposed scheme uses simple division hardware instead of the rotation-mode CORDIC. The implementation results show that the proposed scheme can achieve a significant reduction in hardware complexity.

Keywords

OFDM modulation; computational complexity; digital arithmetic; frequency estimation; synchronisation; OFDM systems; RFO compensation; RFO estimation; coordinate rotation digital computer algorithm; hardware complexity; orthogonal frequency division multiplexing systems; residual frequency offset synchronization scheme; rotation-mode CORDIC; simplified CORDIC algorithm; vector-mode CORDIC; Data communication; Demodulation; Fading; Fast Fourier transforms; Frequency synchronization; Hardware; Maximum likelihood estimation; OFDM; Robustness; Telecommunication computing;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications Theory Workshop, 2009. AusCTW 2009. Australian

Conference_Location

Sydney, NSW

Print_ISBN

978-1-4244-3356-8

Electronic_ISBN

978-1-4244-3357-5

Type

conf

DOI

10.1109/AUSCTW.2009.4805602

Filename

4805602