Title :
On the guard band-based coarse frequency offset estimation technique for burst OFDM systems
Author :
Prasetyo, B.Y. ; Said, F. ; Aghvami, A.H.
Author_Institution :
Centre for Telecommun. Res., King´´s Coll., London, UK
Abstract :
A multiple number of subcarrier frequency offsets is estimated in the frequency domain. This is achieved by adjusting the power of the reference symbol transmitted and utilizing a guard-band power detection method in the receiver. The power of the start symbol of two repetitive symbols, which also acts as a reference symbol in differential modulation, is varied linearly in the frequency domain to increase the power difference between modulated (valid) subcarriers and noisy non-modulated (virtual) carriers. The performance of the proposed frame is confirmed by simulation for a DQPSK system in a multipath-fading environment
Keywords :
OFDM modulation; differential phase shift keying; error statistics; fading channels; frequency estimation; frequency-domain analysis; multipath channels; quadrature phase shift keying; signal detection; simulation; wireless LAN; DQPSK system; burst OFDM systems; coarse frequency offset estimation; differential modulation; error probability reduction; frequency domain; guard-band power detection method; modulated subcarriers; multipath-fading environment; noisy nonmodulated carriers; receiver; reference symbol; simulation; start symbol power; subcarrier frequency offsets; symbol power adjustment; wireless LAN; AWGN; Chirp modulation; Communication standards; Fading; Frequency domain analysis; Frequency estimation; Gaussian noise; Intersymbol interference; OFDM modulation; Transmitters;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851450
