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Low-power Frequency Offset Synchronization for IEEE 802.11a Using CORDIC Algorithm  

Jang, Young-Beom (College of Engineering, Sangmyung University)
Han, Jae-Woong (College of Engineering, Sangmyung University)
Hong, Dae-Ki (College of Engineering, Sangmyung University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.46, no.2, 2009 , pp. 66-72 More about this Journal
Abstract
In this paper, an efficient frequency offset synchronization structure for OFDM(Orthogonal Frequency Division Multiplexing) is proposed. Conventional CORDIC(Coordinate Rotation Digital Computer) algorithm for frequency offset synchronization utilizes two CORDIC hardware i.e., one is vector mode for phase estimation, the other is rotation mode for compensation. But proposed structure utilizes one CORDIC hardware and divider. Through simulation, it is shown that hardware implementation complexity is reduced compared with conventional structures. The Verilog-HDL coding and front-end chip implementation results for the proposed structure show 22.1% gate count reduction comparison with those of the conventional structure.
Keywords
OFDM; CORDIC; Vector Mode; WLAN; Frequency Synchronization;
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