TY - JOUR
T1 - A blind synchronizer for OFDM systems based on SINR maximization in multipath fading channels
AU - Chin, Wen Long
AU - Chen, Sau Gee
N1 - Funding Information:
Manuscript received September 17, 2007; revised March 6, 2008, May 3, 2008, and May 4, 2008. First published May 14, 2008; current version published February 17, 2009. This work was supported in part by Grant NSC 95-2219-E-009-004 and Grant MOEA 95-EC-17-A-01-S1-048, Taiwan. The review of this paper was coordinated by Dr. K. T. Wong.
PY - 2009
Y1 - 2009
N2 - This paper presents a blind synchronizer for orthogonal frequency-division multiplexing (OFDM) systems based on signal-to-interference-and-noise ratio (SINR) maximization. Due to the incurred losses from intersymbol interference (ISI) and intercarrier interference (ICI) introduced by synchronization errors, the SINR of the received data drastically drops. By taking advantage of this characteristic, both the symbol time and carrier frequency offsets are intuitively estimated by maximizing the SINR metric. For the SINR metric, two blind SINR estimations are investigated. The estimations do not need prior knowledge of the channel profiles and transmitted data. As such, the proposed maximum SINR (MSINR) synchronization algorithm is nondata aided so that the transmission efficiency can be improved. Moreover, to reduce the computational complexity, the early-late gate technique is proposed for the implementation of the synchronizer. Simulation results exhibit better performance for the MSINR algorithm than conventional techniques in multipath fading channels.
AB - This paper presents a blind synchronizer for orthogonal frequency-division multiplexing (OFDM) systems based on signal-to-interference-and-noise ratio (SINR) maximization. Due to the incurred losses from intersymbol interference (ISI) and intercarrier interference (ICI) introduced by synchronization errors, the SINR of the received data drastically drops. By taking advantage of this characteristic, both the symbol time and carrier frequency offsets are intuitively estimated by maximizing the SINR metric. For the SINR metric, two blind SINR estimations are investigated. The estimations do not need prior knowledge of the channel profiles and transmitted data. As such, the proposed maximum SINR (MSINR) synchronization algorithm is nondata aided so that the transmission efficiency can be improved. Moreover, to reduce the computational complexity, the early-late gate technique is proposed for the implementation of the synchronizer. Simulation results exhibit better performance for the MSINR algorithm than conventional techniques in multipath fading channels.
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U2 - 10.1109/TVT.2008.925320
DO - 10.1109/TVT.2008.925320
M3 - Article
AN - SCOPUS:61449237307
SN - 0018-9545
VL - 58
SP - 625
EP - 635
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 2
ER -