Radio system and a method for relaying packetized radio signals
First Claim
1. A radio system for relaying packetized radio signals, the radio system comprising:
- at least one transmit path adapted to forward a packetized payload signal as a transmit signal, the at least one transmit path comprising a coupler for extracting a coupled transmit signal out of the transmit signal,a single synchronization unit for extracting a temporal order of the packetized payload signal and providing a clocking signal from the packetized payload signal,a base band calibration signal generator adapted to insert a continuous base band calibration signal into the packetized payload signal, the base band calibration signal being synchronized to the clocking signal, so that the continuous base band signal is synchronized to the packetized payload signala digital predistortion unit adapted to apply a digital predistortion to the packetized payload signal for linearising a transfer characteristic of the radio system,a calibration unit adapted to apply phase and amplitude changes to the at least one transmit path,a feedback path commonly used by the digital predistortion unit and the calibration unit for feeding back a feedback signal, wherein at least one of the phase and amplitude changes and the digital predistortion is adapted using the said feedback signala calibration signal modulator for transforming the base band calibration signal into a calibration signal for calibrating the feedback path, wherein the digital predistortion unit updates the digital predistortion in response to the feedback signal,wherein the calibration signal is forwarded as the feedback signal, wherein the calibration signal comprises a signal change portion pertaining to the calibration of the phase and amplitude changes, wherein the signal change portion is provided in at least one of a frequency outside of a frequency band used in connection with the digital predistortion or in the form of a narrow band signal of vanishing value.
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Accused Products
Abstract
The present invention provides a radio system and a method for relaying packetized radio signals. The radio system comprises at least one transmit path, a base band calibration signal generator for generating a base band calibration signal, a digital predistortion unit, a calibration unit and a feedback path. The feedback path is commonly used by the digital predistortion unit and the calibration unit for feeding back a feedback signal. The feedback signal is adapted to update at least one of phase and amplitude changes and the digital predistortion. The present invention further relates to a method for relaying packetized radio signals. The method is capable of updating the digital predistortion as well as adapted for an updating of the phase and amplitude changes. The updating of the digital predistortion and the updating of the phase and amplitude changes is implemented using the feedback signal. The present invention further relates to a computer program product for the manufacture of the radio system. The present invention further relates to a computer program product for the execution of the method.
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Citations
26 Claims
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1. A radio system for relaying packetized radio signals, the radio system comprising:
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at least one transmit path adapted to forward a packetized payload signal as a transmit signal, the at least one transmit path comprising a coupler for extracting a coupled transmit signal out of the transmit signal, a single synchronization unit for extracting a temporal order of the packetized payload signal and providing a clocking signal from the packetized payload signal, a base band calibration signal generator adapted to insert a continuous base band calibration signal into the packetized payload signal, the base band calibration signal being synchronized to the clocking signal, so that the continuous base band signal is synchronized to the packetized payload signal a digital predistortion unit adapted to apply a digital predistortion to the packetized payload signal for linearising a transfer characteristic of the radio system, a calibration unit adapted to apply phase and amplitude changes to the at least one transmit path, a feedback path commonly used by the digital predistortion unit and the calibration unit for feeding back a feedback signal, wherein at least one of the phase and amplitude changes and the digital predistortion is adapted using the said feedback signal a calibration signal modulator for transforming the base band calibration signal into a calibration signal for calibrating the feedback path, wherein the digital predistortion unit updates the digital predistortion in response to the feedback signal, wherein the calibration signal is forwarded as the feedback signal, wherein the calibration signal comprises a signal change portion pertaining to the calibration of the phase and amplitude changes, wherein the signal change portion is provided in at least one of a frequency outside of a frequency band used in connection with the digital predistortion or in the form of a narrow band signal of vanishing value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 25)
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18. A method for relaying packetized radio signals, the method comprising:
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providing a packetized payload signal, extracting a temporal order of the packetized signal and providing a clocking signal generating a continuous base band calibration signal adapted to be inserted into the packetized payload signal, wherein the continuous base band calibration signal is in synchronization with said clocking signal, applying a digital predistortion to the packetized payload signal, applying phase and amplitude changes to at least one transmit path, forwarding the packetized payload signal as a transmit signal along at least one transmit path, feeding back a feedback signal, wherein the calibration signal is forwarded as the feedback signal, updating the digital predistortion in response to the feedback signal, and updating the phase and amplitude changes in response to the feedback signal modulating the base band calibration signal to yield a calibration signal and feeding back the calibration signal as the feedback signal, wherein the calibration signal comprises a signal change portion pertaining to the calibration of the phase and amplitude changes, wherein the signal change portion is provided in at least one of a frequency outside of a frequency band used in connection with the digital predistortion or in the form of a narrow band signal of vanishing value. - View Dependent Claims (19, 20, 21, 22, 23, 24, 26)
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Specification