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1. (GB2515861) Transmitter and receiver and methods of transmitting and receiving

Office : Royaume-Uni
Numéro de la demande : 201405037 Date de la demande : 20.03.2014
Numéro de publication : 2515861 Date de publication : 07.05.2014
Type de publication : A
CIB :
H04L 27/26
H ÉLECTRICITÉ
04
TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
L
TRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
27
Systèmes à porteuse modulée
26
Systèmes utilisant des codes à fréquences multiples
CPC :
H04L 27/2607
H04L 27/2613
H04L 27/2627
H04L 27/2649
H04L 27/2655
H04L 27/2663
H04L 27/2665
H04L 27/2678
H04L 27/2685
H04L 27/2675
H04L 27/261
H04L 27/2656
Déposants : SONY CORP
Inventeurs : ATUNGSIRI SAMUEL ASANBENG
Données relatives à la priorité : 201312048 04.07.2013 GB
201403392 26.02.2014 GB
Titre : (EN) Transmitter and receiver and methods of transmitting and receiving
Abrégé :
(EN) A frame structure for an orthogonal frequency division multiplexed (OFDM) system (e.g. DVB) comprises preamble and payload symbols, with the preamble symbols including overhead signalling. To achieve frame detection/synchronisation, a signature sequence 1302, 1303 is added to each of the sub-carriers of the preamble symbols 1301. The two signals may be power scaled 1002, 1006 to ensure their combination maintains constant power. The signature sequence may be selected from a set of sequences with the selection providing a message, for example, an early warning signal (EWS). A guard interval (GI) is formed from a part of the signature sequence and prefixed to the preamble so that a receiver can detect the EWS from the guard interval, thus reducing the time required to detect the EWS. The guard interval may be made up solely from the signature sequence 1403, 1404 so as to increase the likelihood of signature sequence detection. A post-fix to the preamble may be formed from a different part of the signature sequence (fig. 28).
Également publié sous:
GB2515854GB2515801