Title :
Joint timing and Carrier frequency offset estimation for OFDM WLAN systems
Author :
Priya, C. Geetha ; Ananthi, P.
Author_Institution :
Electron. & Commun. Eng. Dept., Mepco Schlenk Eng. Coll., Sivakasi, India
Abstract :
This paper presents a joint timing and carrier frequency offset estimation scheme for Orthogonal Frequency Division Multiplexing (OFDM) over an Additive White Gaussian Noise (AWGN) channel, flat fading and frequency selective fading (Rayleigh channel). Estimating the correct Carrier frequency offset (CFO) minimizes the inter carrier interference (ICI). Orthogonality is maintained by using Maximum Likelihood (ML) function. By using symbol timing offset (STO) the start of the frame is estimated and it will minimize the inter symbol interference (ISI).
Keywords :
AWGN channels; OFDM modulation; Rayleigh channels; channel estimation; intercarrier interference; intersymbol interference; maximum likelihood estimation; wireless LAN; OFDM WLAN systems; Rayleigh channel; additive white Gaussian noise channel; carrier frequency offset estimation; flat fading; frequency selective fading; intercarrier interference; intersymbol interference; joint timing; maximum likelihood function; symbol timing offset; AWGN; Fading; Frequency estimation; Maximum likelihood estimation; OFDM; Signal to noise ratio; Carrier Frequency Offset (CFO); Cramer-Rao Lower Bound (CRLB); Data Aided (DA); Maximum Likelihood (ML); Orthogonal Frequency Division Multiplexing (OFDM); Symbol Timing Offset (STO);
Conference_Titel :
Emerging Trends in Electrical and Computer Technology (ICETECT), 2011 International Conference on
Conference_Location :
Tamil Nadu
Print_ISBN :
978-1-4244-7923-8
DOI :
10.1109/ICETECT.2011.5760291
