Are SC-FDE Systems Robust to CFO?

Author

Chen, Ying ; Zhang, Jian ; Jayalath, A.D.S.

Author_Institution

Inst. for Telecommun. Res., Univ. of South Australia, Adelaide, SA, Australia

fYear

2010

fDate

18-21 April 2010

Firstpage

1

Lastpage

6

Abstract

This paper investigates the impact of carrier frequency offset (CFO) on Single Carrier wireless communication systems with Frequency Domain Equalization (SC-FDE). We show that CFO in SC-FDE systems causes irrecoverable channel estimation error, which leads to inter-symbol-interference (ISI). The impact of CFO on SC-FDE and OFDM is compared in the presence of CFO and channel estimation errors. Closed form expressions of signal to interference and noise ratio (SINR) are derived for both systems, and verified by simulation results. We find that when channel estimation errors are considered, SC-FDE is similarly or even more sensitive to CFO, compared to OFDM. In particular, in SC-FDE systems, CFO mainly deteriorates the system performance via degrading the channel estimation. Both analytical and simulation results highlight the importance of accurate CFO estimation in SC-FDE systems.

Keywords

OFDM modulation; channel estimation; equalisers; frequency-domain analysis; intersymbol interference; radio networks; ISI; OFDM; SC-FDE systems; SINR; carrier frequency offset; channel estimation error; frequency domain equalization; intersymbol-interference; signal to interference and noise ratio; single carrier wireless communication systems; Analytical models; Channel estimation; Degradation; Frequency domain analysis; Intersymbol interference; OFDM; Robustness; Signal to noise ratio; System performance; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Conference (WCNC), 2010 IEEE

Conference_Location

Sydney, NSW

ISSN

1525-3511

Print_ISBN

978-1-4244-6396-1

Type

conf

DOI

10.1109/WCNC.2010.5506751

Filename

5506751