Title :
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
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;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2010 IEEE
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4244-6396-1
DOI :
10.1109/WCNC.2010.5506751
