# US 9,438,289 B2 · Transmitting apparatus and method for receiving a digital signal in a digital telecommunication system

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- Number: US 9,438,289 B2
- Document ID: US9438289B2
- Status: Granted
- Kind: B2
- Application number: 14/552,082
- Filed: 2014-11-24
- Published: 2015-03-19
- Granted: 2016-09-06
- Earliest claimed: 1999-02-24
- Assignees: Sony Deutschland GmbH
- Applicants: Sony Deutschland GmbH
- Inventors: Ralf Böhnke; Thomas Dölle; Tino Puch
- Web page: https://patentgrep.com/patent/US9438289B2

## CPC

- H04L 27/2663: {Coarse synchronisation, e.g. by correlation}
- H04B 1/16: Circuits
- H04L 7/042: {Detectors therefor, e.g. correlators, state machines (digital correlators in general G06F17/15)}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

A receiver that receives a reference symbol comprising a sequence of a plurality of synchronization repetition patterns, wherein each repetition pattern contains a predetermined number of samples. The reference symbol is part of a digital signal modulated by using OFDM modulation. An end synchronization repetition pattern in the reference symbol is phase-shifted by 180°, and the phase-shifted synchronization repetition pattern is positioned after the sequence of the number of synchronization repetition patterns. The receiver detects a timing of a correlation peak at the end of said reference symbol by performing a cross-correlation of the synchronization repetition patterns.

## Claims

### Claim 1

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

### Claim 2

A method comprising:
receiving a reference symbol comprising at least nine synchronization repetition patterns, wherein
each synchronization repetition pattern contains a predetermined number of samples,
the reference symbol is part of a digital signal modulated by using OFDM modulation, and
an end synchronization repetition pattern in the reference symbol is phase-shifted by 180° in relation to the other synchronization repetition patterns included in the reference symbol;
performing a synchronization process by detecting
a timing of an end of the reference symbol by performing a cross-correlation of the plurality of synchronization repetition patterns.