Title :
A Fast Joint Frame Synchronization and Frequency Offset Acquisition Algorithm for OFDM Systems
Author_Institution :
Fudan Univ., Shanghai
fDate :
March 31 2008-April 3 2008
Abstract :
This paper proposes a fast joint frame synchronization and frequency offset acquisition algorithm for OFDM systems. A training sequence composed by linear frequency modulation signals is superimposed on the data signal at the transmitter side. Then, by fractional Fourier transform the frame synchronization and frequency offset acquisition can be obtained from the received signal simultaneously. Even under the low signal to noise ratio conditions, this algorithm can keep the estimation accuracy with lower computational complexity. Theoretical analysis and simulation results over AWGN and multi-path channel prove this point.
Keywords :
AWGN channels; Fourier transforms; OFDM modulation; communication complexity; estimation theory; frequency modulation; multipath channels; radio transmitters; synchronisation; AWGN; OFDM system; data signal; estimation accuracy; fast joint frame synchronization; fractional Fourier transform; frequency offset acquisition; linear frequency modulation signal; low signal to noise ratio; lower computational complexity; multipath channel; training sequence; transmitter; AWGN; Analytical models; Chirp modulation; Computational complexity; Computational modeling; Fourier transforms; Frequency synchronization; OFDM; Signal to noise ratio; Transmitters;
Conference_Titel :
Wireless Communications and Networking Conference, 2008. WCNC 2008. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1997-5
DOI :
10.1109/WCNC.2008.228
