Title :
A modified preamble structure based carrier frequency offset (CFO) compensation in an OFDM system
Author :
Malarvezhi, P. ; Kumar, Ravindra
Author_Institution :
Dept. of Electron. & Commun. Eng., SRM Univ., Kattankulathur, India
Abstract :
The Systems using Orthogonal Frequency Division Multiplexing (OFDM) suffer with carrier frequency offset (CFO) results in inter carrier interference (ICI) due to which there will be large performance degradation. The impairment like CFO is caused due to mismatch of carrier frequency at the transmitter to local oscillator frequency at the receiver, multipath and Doppler shift. This paper presents a modified preamble structure based approach for CFO compensation in an OFDM systems which mitigate the effect of inter carrier interference and its equivalent energy loss. Theoretical analysis and simulation results substantiate the importance and advantages of proposed CFO compensation approach. This proposed method provides a considerable signal to noise ratio gain on bit error rate performance.
Keywords :
Doppler shift; OFDM modulation; WiMax; broadband networks; compensation; error statistics; fading channels; intercarrier interference; oscillators; radio access networks; radio receivers; radio transmitters; CFO compensation; Doppler shift; ICI; IEEE802.16; OFDM system; WiMAX; bit error rate performance; broadband wireless multiple access networks; energy loss; frequency-selective fading channels; intercarrier interference; local oscillator frequency; multipath shift; orthogonal frequency division multiplexing; performance degradation; preamble structure based carrier frequency offset compensation; signal-to-noise ratio gain; Channel estimation; Estimation; Frequency estimation; OFDM; Receivers; Signal to noise ratio; Training; Carrier Frequency Offset (CFO); Orthogonal frequency division multiplexing (OFDM); Preamble;
Conference_Titel :
Communications and Signal Processing (ICCSP), 2013 International Conference on
Conference_Location :
Melmaruvathur
Print_ISBN :
978-1-4673-4865-2
DOI :
10.1109/iccsp.2013.6577105
