Abstract

A frequency-timing synchronization scheme for the downlink of filtered multitone modulation (FMT) based Terrestrial Trunked Radio (TETRA) system is presented. To achieve high-rate data transmission and better transmission quality, TETRA2 has been proposed in recent years. However, there are serious issues with the new wide-band TETRA system in frequency-timing synchronization. TETRA mainly specifies 2 sequences for downlink synchronization, i.e. downlink sync sequence set (DSS) and frequency correction set (FrCS). Researching the cross-correlation properties of these sequences and the existing data-aided synchronization algorithm for FMT, we propose an efficient method to estimate the frequency-offset and timing-offset for TETRA2 and analyze its performance in AWGN.

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