Method and device for change of reception frequency in a...

Details Method and device for change of reception frequency in a... Method and device for change of reception frequency in a...

H - Electricity

03

J

H03J 1/00 (2006.01) H04L 1/24 (2006.01) H04L 27/26 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2303938

A method and a device for test receiving alternative frequencies without interrupting the reception of DAB frames from the current reception frequency in a DAB receiver. A DAB frame comprises a null symbol which is used to do a first very coarse synchronisation of the receiver to the transmitted signals. According to the invention, test receptions of alternative frequencies occur during the currently received programme's null symbols. By performing test receptions during the current programme's null symbols the current programme is not interrupted at all during the test receptions. A subsequently determined frequency changeover can thereafter, with a high probability, be performed without any noticeable interruption.

Procédé et dispositif pour l'essai de réception de fréquences d'autres fréquences de réception sans interruption de la réception des séquences RAN de la fréquence de réception en cours d'utilisation dans un récepteur RAN. Une séquence RAN comprend un symbole nul qui est utilisé pour une synchronisation très grossière du récepteur par rapport aux signaux émis. Les essais de réception d'autres fréquences ont lieu pendant les symboles nuls du programme en cours de réception, lequel n'est pas du tout interrompu pendant lesdits essais. Une permutation de fréquence déterminée ultérieurement peut être assurée, avec une grande probabilité, sans interruption perceptible.

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