OFDM Systems: Timing Synchronization Hardware Implementation Method

Volume 19 No 2 (2021)

Mrs.S.Pavithra, Mr.J.R Nishanth, Mrs.R.Tamil Selvi, Mrs.R.Shalini

DOI: 10.48047/nq.2021.19.2.NQ21055

Abstract

This research presents a timing synchronization hardware implementation method suitable for Orthogonal Frequency Division Multiplexing (OFDM) systems. The method ensures compatibility with the IEEE 802.11a/g/n protocols and enhances the accuracy of cyclic shift processing in the IEEE 802.11n protocol. A robust frame detecting algorithm is devised, employing cluster peak detection and instantaneous peak detection to improve the accuracy of data detection. Coarse and fine frequency offset estimations are performed using two self-correlation modules and a moving average module, respectively, to achieve a comprehensive frequency offset estimation. An improved CORDIC algorithm is utilized for frequency offset correction, enhancing operational efficiency.

Keywords

Timing synchronization, OFDM system, IEEE 802.11a/g/n, cyclic shift, frame detection, frequency offset estimation, CORDIC algorithm.

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