Frame synchronisation in an OFDM communication system

摘要

The method involves distributing a set of digital symbols to be transmitted on different sub-carriers and in time for forming successive frames, where each frame includes different successive blocks of symbols that are succeeded in time without guard interval. Pilot symbols distributed in time and frequency are incorporated with the symbols to be transmitted. The phase of the pilot symbols is modulated from one block to another block with frame periodicity. An orthogonal frequency-division multiplexing modulation diagram is applied to the pilot symbols. Independent claims are also included for the following: (1) an orthogonal frequency-division multiplexing transmitter comprising a construction unit (2) a method for receiving an orthogonal frequency-division multiplexing signal (3) a orthogonal frequency-division multiplexing signal receiver comprising a synchronization unit.