Apparatus and method for modulating of on-channel repeater

H - Electricity – 04 – N

Patent

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H04N 7/015 (2006.01)

Patent

CA 2553753

Provided is a modulating apparatus and method of an on-channel repeater. An object of the present invention is to provide a modulating apparatus of an on- channel repeater for reducing time delay by configuring and up-sampling a baseband signal, filtering the up-sampled baseband signal with an Equi-Ripple (ER) filter or in a window method, and converting the filtered baseband signal into an RF signal. The modulating apparatus includes: a baseband signal configuring unit for configuring a baseband. signal by combining an input field and a segment sync signal; a pilot adding unit for adding a pilot signal to the baseband signal; a filtering unit for filtering the baseband signal with the pilot signal; and an RF up-converting unit for up-converting the filtered signal into an RF signal. The present invention is used to form an on- channel repeating network in a transmitting system including a digital TV broadcasting system.

L'invention concerne un appareil et un procédé permettant de moduler le répéteur sur le canal de réception. L'appareil de modulation du répéteur sur le canal de réception permet de réduire le retard en configurant et en suréchantillonnant un signal en bande de base, de filtrer le signal en bande de base suréchantillonné à l'aide d'un filtre à ondulations égales (ER) ou dans un procédé à fenêtres et de convertir le signal en bande de base filtré en un signal HF. L'appareil de modulation selon l'invention comprend : une unité de configuration du signal en bande de base permettant de configurer un signal en bande de base en combinant un champ d'entrée et un signal de synchronisation de segments ; une unité d'addition de signaux pilotes permettant d'ajouter un signal pilote au signal en bande de base ; et une unité de montée en fréquence HF permettant de convertir vers le haut le signal filtré en un signal HF. La présente invention permet de former un réseau de répétition sur le canal de réception dans un système de transmission comprenant un système de radiodiffusion TV numérique.

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