Title :
Frequency Synchronization for Interleaved OFDMA Uplink Based on Adaptive Beamformer
Author :
Fan, Da ; Cao, Zhigang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
In this work, a novel frequency synchronization algorithm is proposed for the uplink of the orthogonal frequency-division multiple access (OFDMA) system with interleaved subcarrier assignment, where adaptive beamformer is used to compensate the CFO of each user and isolate the signals of all users at the same time. Compared to the previously known methods, the proposed algorithm can provide accurate frequency synchronization without feeding CFO estimates back to active users for frequency adjustment. Simulation results indicate that the proposed minimum mean square error (MMSE) adaptive beamformer obtains a considerable SNR gain on the bit error rate (BER) performance
Keywords :
OFDM modulation; array signal processing; error statistics; frequency division multiple access; frequency estimation; least mean squares methods; synchronisation; telecommunication links; BER; CFO; MMSE; OFDMA uplink; adaptive beamformer; bit error rate performance; frequency synchronization algorithm; interleaved subcarrier assignment; minimum mean square error; orthogonal frequency-division multiple access system; Bit error rate; Degradation; Digital communication; Discrete Fourier transforms; Frequency estimation; Frequency synchronization; Laboratories; Mean square error methods; OFDM; Performance gain;
Conference_Titel :
TENCON 2006. 2006 IEEE Region 10 Conference
Conference_Location :
Hong Kong
Print_ISBN :
1-4244-0548-3
Electronic_ISBN :
1-4244-0549-1
DOI :
10.1109/TENCON.2006.343957
