Device and method for pre-treating a signal to be transmitted using a non-linear amplifier with an upstream band-pass filter
First Claim
1. A device for pretreating a signal (S1) to be transmitted over a transmission path, wherein the transmission path comprises a band-pass filter (14) whose pass-band width (30) is smaller than a predetermined bandwidth and a non-linear amplifier (16), comprising:
- linearization means (20) for performing such a linearization of the signal (S1) to be transmitted before the transmission of the same, that a non-linearity caused by the non-linear amplifier (16) is counteracted;
a signal shaping means (22) downstream to the linearization means (20) comprising such a frequency response (32) that the overall frequency response (34) of the signal-shaping means (22) and the band-pass filter (14) corresponds to the frequency response of a filter whose pass-band width is at least equal to the predetermined bandwidth wherein the linearizer and the signal-shaping means are arranged in the ground station of a satellite transmission system and wherein the band-pass filter and the non-linear amplifier are arranged in a satellite of the satellite transmission system.
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Accused Products
Abstract
A device for pretreating a signal to be transmitted over a transmission path, wherein the transmission path comprises a band-pass filter whose pass-band width is smaller than a predetermined bandwidth and a non-linear amplifier, includes a linearization means for performing a linearization of the signal to be transmitted before the transmission of the same, such that a non-linearity caused by the non-linear amplifier is counteracted. Further, the device includes a signal-shaping means downstream to the linearization means comprising a frequency response such that the overall frequency response of the signal-shaping means and the band-pass filter corresponds to the frequency response of a filter whose pass-band width is at least equal to the predetermined bandwidth.
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Citations
4 Claims
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1. A device for pretreating a signal (S1) to be transmitted over a transmission path, wherein the transmission path comprises a band-pass filter (14) whose pass-band width (30) is smaller than a predetermined bandwidth and a non-linear amplifier (16), comprising:
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linearization means (20) for performing such a linearization of the signal (S1) to be transmitted before the transmission of the same, that a non-linearity caused by the non-linear amplifier (16) is counteracted; a signal shaping means (22) downstream to the linearization means (20) comprising such a frequency response (32) that the overall frequency response (34) of the signal-shaping means (22) and the band-pass filter (14) corresponds to the frequency response of a filter whose pass-band width is at least equal to the predetermined bandwidth wherein the linearizer and the signal-shaping means are arranged in the ground station of a satellite transmission system and wherein the band-pass filter and the non-linear amplifier are arranged in a satellite of the satellite transmission system. - View Dependent Claims (2, 3)
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4. A method for transmitting a first signal over a transmission path comprising a band-pass filter whose pass-band width is less than a predetermined bandwidth, and a non-linear amplifier, comprising the following steps:
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performing such a linearization of the first signal that a non-linearity caused by the non-linear amplifier is compensated for, in order to generate a second signal; directing the second signal through a signal shaper comprising such a frequency response that the overall frequency response of the signal shaper and the band-pass filter corresponds to the frequency response of a filter whose pass-band width is at least equal to the predetermined bandwidth, in order to generate a third signal; and transmitting the third signal over the transmission path wherein the linearization and the signal-shaping means are arranged in the ground station of a satellite transmission system and wherein the band-pass filter and the non-linear amplifier are arranged in a satellite of the satellite transmission system.
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Specification