Apparatus and method for reducing papr of preamble signal in...

H - Electricity – 04 – N

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H04N 7/08 (2006.01)

Patent

CA 2721415

A method and apparatus for reducing a Peak to Average Power Ratio (PAPR) in a digital broadcasting system are provided. Reserved tones are determined, and the determined reserved tones are used to transmit a signal having an impulse char-acteristic in locations of sub-carriers that do not collide with a pilot signal of a preamble in a frame. The signal having the impulse characteristic is transmitted through the reserved tones in a symbol interval for which the preamble is transmitted.

L'invention porte sur un procédé et sur un appareil pour réduire un rapport de puissance crête sur moyenne (PAPR) dans un système de diffusion numérique. Des tonalités réservées sont déterminées, et les tonalités réservées déterminées sont utilisées pour transmettre un signal ayant une caractéristique d'impulsion dans des emplacements de sous-porteuses qui n'entrent pas en collision avec un signal pilote d'un préambule dans une trame. Le signal ayant la caractéristique d'impulsion est transmis par les tonalités réservées dans un intervalle de symbole pour lequel le préambule est transmis.

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