Absolute timing and tx power calibration of the tx path in a distibuted system
AssigneeKathrein-Werke KG
InventorJohannes Schlee
Life of this patent
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Abstract
A radio system and a method for relaying packetized radio signals is disclosed. The radio system and the method provide a calibration of transmit signals. Furthermore the radio system and the method provide a measurement of a transmit power level. The radio system comprises at least one transmit path, a calibration unit, a base band calibration signal generator synchronised to a synchronisation unit, at the least one link and a power sensor. A portion of a selected one of coupled transmit signals is forwarded to a power sensor for measuring a power level, wherein the calibration unit is adapted to update a transmit power level of the at least one transmit path in response to the transmit power level of the selected one of the coupled transmit signals.
Claims35
A radio system for relaying packetized radio signals, the radio system comprising:
- a base band calibration signal generator adapted to insert a base band calibration signal into a packetized payload signal, the base band calibration signal being synchronised to a synchronisation unit;
- a calibration unit adapted to split the packetized payload signal, thus producing at least one calibrated payload signal, the calibration unit further being adapted to apply at least one of phase, amplitude and delay changes to the at least one calibrated payload signal;
- at least one link adapted to forward the at least one calibrated payload signal to at least one transmit path;
- at least one transmit path adapted to forward the calibrated payload signal as a transmit signal;
- a feedback path for feeding back a feedback signal;
- a coupler adapted to extract coupled transmit signals from the transmit signal;
- a power sensor for measuring a transmit power of a portion of a first one of the coupled transmit signals;
- wherein the at least one of phase, amplitude and delay changes are adaptable using a base band feedback signal generated from the feedback signal.
A method for relaying packetized radio signals, the method comprising:
- providing a packetized payload signal;
- generating a base band calibration signal adapted to be inserted into the packetized payload signal, wherein the base band calibration signal is in synchronisation with a synchronisation unit;
- generating a calibrated payload signal,
- forwarding the calibrated payload signal as a transmit signal;
- feeding back a feedback signal;
- power measuring a power level of a portion of a selected one of coupled transmit signals;
- and
- updating at least one of phase, amplitude and delay changes in response to the feedback signal.
Computer program product embodied on a computer-readable medium and the computer-readable medium comprising executable instructions for the manufacture of the radio system for relaying packetized radio signals, the radio system comprising:
- a base band calibration signal generator adapted to insert a base band calibration signal into a packetized payload signal, the base band calibration signal being synchronised to a synchronisation unit;
- a calibration unit adapted to split the packetized payload signal, thus producing at least one calibrated payload signal, the calibration unit further being adapted to apply at least one of phase, amplitude and delay changes to the at least one calibrated payload signal;
- at least one link adapted to forward the at least one calibrated payload signal to at least one transmit path;
- at least one transmit path adapted to forward the calibrated payload signal as a transmit signal;
- a feedback path for feeding back a feedback signal;
- a coupler adapted to extract coupled transmit signals from the transmit signal;
- a power sensor for measuring a transmit power of a portion of a first one of the coupled transmit signals,
- wherein the at least one of phase, amplitude and delay changes are adaptable using a base band feedback signal generated from the feedback signal.
Computer program product embodied on a computer-readable medium and the computer-readable medium comprising executable instructions for the execution of a method for relaying packetized radio signals, the method comprising:
- providing a packetized payload signal;
- generating a base band calibration signal adapted to be inserted into the packetized payload signal, wherein the base band calibration signal is in synchronisation with a synchronisation unit;
- generating a calibrated payload signal;
- forwarding the calibrated payload signal as a transmit signal;
- feeding back a feedback signal;
- power measuring a power level of a portion of a selected one of coupled transmit signals;
- and
- updating at least one of phase, amplitude and delay changes in response to the feedback signal.
Dependencies are inferred from the claim text.