Base transceiver station with distortion compensation
First Claim
1. Base transceiver station for a radio communication system, the base transceiver station having a transmitter unit, a receiver unit independent of said transmitter unit, and a transmit path between the transmitter unit and an antenna and a receive path between the receiver unit and said antenna, wherein the receiver unit determines output data from received signals and the transmitter unit converts input data into transmitted signals and pre-distorts the transmitted signals using at least one compensation value, and wherein the base transceiver station further comprises:
- a branching unit for transferring at least a portion of a transmitted signal from the transmit path to the receiver unit; and
a processing unit independent of said transmitter which is adapted to receive a representation of the input data to said transmitter unit and the output data from said receiver unit;
the processing unit being further adapted to compare the input data to the output data, to determine a first compensation value for the pre-distortion according to the comparison, and to update the compensation value of the transmitter unit with the first compensation value;
wherein said receive path is adapted to transfer the output of the branching unit to the receiver unit, and wherein the processing unit compares the input data to the output data and determines the first compensation value according to the comparison.
1 Assignment
0 Petitions
Accused Products
Abstract
A base transceiver station for a radio communication system comprises a transmitter unit (TU), a receiver unit (RU) and a transmit path between the transmitter unit (TU) and an antenna. The receiver unit (RU) determines output data from received signals and the transmitter unit (TU) converts input data into transmitted signals and pre-distorts the transmitted signals using at least one compensation value. The base transceiver station comprises also a branching unit for transferring at least a portion of a transmitted signal from the transmit path to the receiver unit (RU) and a processing unit (PU) which is adapted to receive a representation of the input data and the output data. The processing unit (PU) compares the input data to the output data, determines a first compensation value for the pre-distortion according to the comparison and updates the compensation value of the transmitter unit (TU) with the first compensation value. Methods and computer programs embodying the invention are also described.
14 Citations
26 Claims
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1. Base transceiver station for a radio communication system, the base transceiver station having a transmitter unit, a receiver unit independent of said transmitter unit, and a transmit path between the transmitter unit and an antenna and a receive path between the receiver unit and said antenna, wherein the receiver unit determines output data from received signals and the transmitter unit converts input data into transmitted signals and pre-distorts the transmitted signals using at least one compensation value, and wherein the base transceiver station further comprises:
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a branching unit for transferring at least a portion of a transmitted signal from the transmit path to the receiver unit; and
a processing unit independent of said transmitter which is adapted to receive a representation of the input data to said transmitter unit and the output data from said receiver unit;
the processing unit being further adapted to compare the input data to the output data, to determine a first compensation value for the pre-distortion according to the comparison, and to update the compensation value of the transmitter unit with the first compensation value;
wherein said receive path is adapted to transfer the output of the branching unit to the receiver unit, and wherein the processing unit compares the input data to the output data and determines the first compensation value according to the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. Method for the correction of signal distortions in a base transceiver station provided with a transmitter unit and a receiver unit independent of said transmitter unit, wherein transmitted signals are sent from the transmitter unit over a transmit path to an antenna, the method comprising the steps of:
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determining first signals for transmission from input data and sending them into the transmit path;
branching off at least a portion of the first transmitted signals from the transmit path;
transferring the branched off signals to the receiver unit;
calculating output data from the signals transferred to the receiver unit;
comparing the input data and the output data in a processing unit independent of said transmitter unit;
determining at least one first compensation value according to the comparison; and
adjusting further transmitted signals according to the first compensation value. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification