Data transmission system with a low peak-to-average power...

H - Electricity – 04 – B

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H04B 7/216 (2006.01) H04B 1/62 (2006.01) H04J 13/00 (2006.01)

Patent

CA 2220393

An electronic data transmission system has a low peak-to-average power ratio by including a transmitter circuit which receives an input signal and in response generates a distorted output signal. This distorted output signal is generated by amplifying the input signal with one particular gain when the input signal is at a maximum magnitude which gives the distorted output signal a corresponding maximum magnitude, and by amplifying the input signal with a larger gain when the input signal is in a predetermined range below the maximum magnitude. The distorted output signal travels over a communication channel to a receiver circuit, which regenerates the input signal by amplifying the distorted output signal with a gain that is the inverse of the gain by which the distorted signal is generated.

Un système électronique de transmission de données a un faible rapport entre les puissances de crête et moyenne, grâce à l'adjonction d'un circuit transmetteur qui reçoit un signal d'entrée et réagit en produisant un signal de sortie déformé. Ce signal de sortie déformé est produit par amplification du signal d'entrée avec un gain particulier quand ce signal d'entrée est à son amplitude maximale, ce qui donne au signal de sortie déformé une amplitude maximale correspondante, et par amplification du signal d'entrée avec un gain supérieur quand ce signal se trouve dans une plage déterminée, au-dessous de l'amplitude maximale. Le signal de sortie déformé est envoyé, par un canal de communications, à un circuit récepteur qui reconstitue le signal d'entrée en amplifiant le signal de sortie déformé avec un gain qui est l'inverse du gain ayant servi à produire le signal déformé.

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