Frequency domain estimation and time domain correction of CFO and STO offsets in OFDM system

Author

Lee, HuiKyu ; Ryu, Heung-Gyoon

Author_Institution

Dept. of Electron. Eng., Chungbuk Nat. Univ., Cheongju, South Korea

fYear

2011

fDate

13-16 Feb. 2011

Firstpage

428

Lastpage

431

Abstract

OFDM can use frequency band efficiently and has strong characteristic for fading channel. But orthogonality collapse when carrier frequency offset and sample timing offset occur. Sample timing offset is represented as phase rotation and ISI. And Carrier frequency offset is represented as phase rotation and ICI. To compensate those effects, many studies were processed based on frequency domain. In this paper, we estimate those effects in frequency domain. And the effects compensate in time domain by using feedback method.

Keywords

OFDM modulation; channel estimation; fading channels; feedback; frequency estimation; frequency-domain analysis; intercarrier interference; intersymbol interference; time-domain analysis; CFO offset; ICI; ISI; OFDM system; STO offsets; carrier frequency offset; fading channel; feedback method; frequency domain estimation; intersymbol interference; phase rotation; sample timing offset; time domain correction; Bit error rate; Delay; Estimation; Frequency domain analysis; OFDM; Receivers; Carrier Frequency Offset; Feedback; Inter-carrier Interference; OFDM; Sample Timing Offset;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Communication Technology (ICACT), 2011 13th International Conference on

Conference_Location

Seoul

ISSN

1738-9445

Print_ISBN

978-1-4244-8830-8

Type

conf

Filename

5745846