Method and arrangement in a transmission system

H - Electricity – 04 – B

Patent

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Details

H04B 1/10 (2006.01) H03M 1/18 (2006.01)

Patent

CA 2201597

A method of extending the dynamic range of a receiver (RX) in a digital radio transmission system (TS), wherein the receiver (RX) receives a radio signal (F) sent from a transmitter (TX) and includes an A/D-converter (ADC), and wherein the method comprises the following steps: selecting an upper limit value (OG) for the dynamic range of the A/D-converter (ADC); determining a minimium accepted signal quality for a radio signal process in the receiver (RX); overextending the A/D-converter so as to exceed the upper limit value (OG); generating a signal quality value downstream of the A/D-converter; comparing the generated signal quality value with the minimum accepted signal quality; limiting the overextension so that the minimium accepted signal quality will be exceeded when the A/D-converter is overextended.

L'invention se rapporte à un procédé permettant d'étendre la portée dynamique d'un récepteur (RX) dans un système de transmission radioélectrique numérique (TS), ce récepteur (RX) recevant un signal radioélectrique (F) transmis par un émetteur (TX) et comprenant un convertisseur analogique/numérique (CAN). Le procédé comprend les étapes suivantes: on sélectionne une valeur seuil supérieure (OG) pour la portée dynamique du CAN; on détermine une qualité de signal minimale admise pour un processus appliqué à un signal radioélectrique dans le récepteur (RX); on suramplifie le CAN de manière à dépasser la valeur seuil supérieure (OG); on génère une valeur de qualité de signal en aval du CAN; on compare la valeur de qualité de signal générée avec la qualité de signal minimale admise; et on limite la suramplification du CAN de sorte que la qualité de signal minimale admise sera dépassée lorsque le CAN sera suramplifié.

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