Method for improving the wanted signal in a radio receiving...

H - Electricity – 04 – B

Patent

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Details

H04B 1/18 (2006.01) H03G 3/20 (2006.01) H03G 3/30 (2006.01) H03G 3/34 (2006.01) H04B 1/06 (2006.01) H04B 1/10 (2006.01) H04B 1/14 (2006.01) H04B 1/16 (2006.01)

Patent

CA 2276797

It is known for a signal-strength detection unit to be used to detect the ratio of the input signal to the wanted signal obtained after it. A disadvantage in this case is that interference elements, which are also amplified, not only corrupt the output signal of the signal-strength detection unit, but can also adversely affect the quality of the wanted signal. The invention is based on the object of providing a method for improving the wanted signal in the receiving unit of a communications system. The method according to the invention for improving the wanted signal in a radio receiving unit having a channel filter, having a switch, having a control unit, having a signal-strength detection unit and having controllable amplifiers is distinguished in that the control unit drives the switch in such a manner that the switch alternately supplies a first signal upstream of the channel filter and a second signal downstream from the channel filter to the signal-strength detection unit, and that the output signal of the signal-strength detection unit is supplied to the control unit, and that the amplifiers are driven as a function of the output signal.

On se sert d'un détecteur de puissance d'un signal pour établir le rapport du signal d'entrée avec le signal utile obtenu par la suite. L'un des désavantages dans ce cas est que les éléments d'interférence, qui se trouvent également amplifiés, non seulement corrompent le signal de sortie du détecteur de puissance de signal, mais ils peuvent également affecter de manière défavorable la qualité du signal utile. L'invention propose une méthode pour améliorer la qualité du signal utile que reçoit le récepteur d'un système de communication. La méthode, qui prévoit un récepteur radio doté d'un filtre de canaux, d'un commutateur, d'une unité de commande, d'un détecteur de puissance de signaux et d'amplificateurs contrôlables, se distingue du fait que l'unité de commande contrôle le commutateur de telle manière qu'il fournit au détecteur de puissance des signaux un premier signal en amont du filtre des canaux, suivi d'un deuxième signal en aval du filtre. Le signal de sortie que produit alors le détecteur est transmis à l'unité de commande et les amplificateurs sont mis à contribution par ce signal de sortie, dont ils sont fonction.

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