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Frame synchronization method and apparatus for use in digital communication system utilizing OFDM method

Young-Sang Kim, +1 more
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TLDR
In this article, a frame synchronization method and apparatus for use in a digital communication system utilizing OFDM method are disclosed, which comprises a phase calculator for calculating phase values of TPS pilots within a symbol according to in-phase and quadrature-phase channel signals received from a transmitting side.
Abstract: 
A frame synchronization method and apparatus for use in a digital communication system utilizing OFDM method are disclosed. The frame synchronization apparatus comprises a phase calculator for calculating phase values of TPS pilots within a symbol according to in-phase and quadrature-phase channel signals received from a transmitting side; a D-BPSK demodulator for performing D-BPSK demodulation for the phase values of TPS pilots supplied from the phase calculator and outputting the TPS pilots within the demodulated symbol; a control signal generator for comparing the demodulated TPS pilots with each other and outputting a control signal according to the compared result; and frame synchronization unit for confirming a sync word position according to the control signal supplied from the control signal generator and outputting a frame sync signal. Hence, frame synchronization can be achieved by using the synchronization word inverted at each frame in one TPS block without the need to increase the size of hardware.

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References
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Patent

OFDM synchronization demodulation circuit

Yasushi Sugita, +2 more
TL;DR: In this article, a constellation analyzing circuit analyzes the constellation of demodulated symbols of predetermined carriers in the demoded OFDM multiplex signal signal, and a clock detection circuit controls the detected clock based on the frequency deviation detected by the clock frequency deviation detection circuit.
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James T. Aslanis, +1 more
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Thomas H. Williams
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Method and arrangement for synchronization in ofdm modulation

Isaksson Mikael
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