TRANSMITTING APPARATUS AND METHOD FOR A DIGITAL TELECOMMUNICATION SYSTEM

摘要

A transmitting apparatus transmits signals in a digital telecommunication system and a synchronising method is used for synchronizing such signals at a receiving apparatus. The transmitting apparatus prepares for transmission of a reference symbol having at least two repetition patterns, whereby one of the at least two repetition patterns is phase-shifted in relation to the other repetition pattern, and a synchronizing mechanism in the digital telecommunication system uses the reference symbol once received for synchronization. The synchronizing mechanism uses a cross-correlation mechanism to cross-correlate at least one of the two repetition patterns within a correlation window having a predetermined length.

主权项

1. A method comprising:
receiving a reference symbol comprising of a sequence of a plurality of synchronization repetition patterns, wherein each repetition pattern contains a predetermined number of samples, said reference symbol is part of a digital signal modulated by using OFDM modulation, an end synchronization repetition pattern in said reference symbol is phase-shifted by 180°, said reference symbol comprises a number of said synchronization repetition patterns, and said phase-shifted synchronization repetition pattern is positioned after the sequence of said number of synchronization repetition patterns; and detecting a timing of a correlation peak at the end of said reference symbol by performing a cross-correlation of said synchronization repetition patterns.