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Frequency offset estimation for OFDM in wireless communications

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6 Author(s)
Ai, B. ; Xidian Univ., Xi''an, China ; Jian-hua GE ; Yong Wang ; Shi-yong Yang
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Timing jitter, frequency offset, carrier phase jitter and sampling clock frequency offset are the main synchronization errors encountered by OFDM systems. As many literatures have proved, OFDM systems are very sensitive to frequency errors. In this paper, three new methods to estimate the integer part of frequency offset are proposed, simulation results show its robustness to mitigate the multi-path effect and its enlarged estimation range for frequency offset. The correspondent field programmable gate array (FPGA) circuit through test in HDTV prototype in Team of Engineering Expert Group (TEEG) proves its feasibility and availability. The proposed method is also suitable for burst mode transmission systems such as wireless local area network (WLAN) and fixed-broadband wireless access (F-BWA).

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Consumer Electronics, IEEE Transactions on  (Volume:50 ,  Issue: 1 )