Methods and Apparatus for Antenna Calibration
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Abstract
The present disclosure provides a method and an apparatus in a radio base station for inter-transceiver antenna calibration. The method comprises collecting a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal. The first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal. The second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal. The method further comprises determining and compensating for an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference. The first reference path loop consists of the reference transmission path and the reference reception path of the first transceiver, and the second reference path loop consists of the reference transmission path and the reference reception path of the second transceiver.
17 Citations
26 Claims
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1-14. -14. (canceled)
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15. A method in a Radio Base Station (RBS) for inter-transceiver antenna calibration, the method comprising:
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collecting a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal, wherein the first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal, and wherein the second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal; determining an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference, wherein the first reference path loop consists of the reference transmission path and the reference reception path of the first transceiver, and wherein the second reference path loop consists of the reference transmission path and the reference reception path of the second transceiver; and compensating for the inter-loop phase response difference. - View Dependent Claims (16, 17, 18, 19)
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20. An apparatus for inter-transceiver antenna calibration in a Radio Base Station (RBS) comprising a memory and a processor, wherein the memory stores machine-readable program code that, when executed by the processor, causes the apparatus to:
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collect a first phase difference between a first signal and a first reception signal and a second phase difference between a second signal and a second reception signal, wherein the first signal is transmitted through a reference transmission path of a first transceiver and received through a reference reception path of a second transceiver as the first reception signal, and wherein the second signal is transmitted through a reference transmission path of the second transceiver and received through a reference reception path of the first transceiver as the second reception signal; determine an inter-loop phase response difference between a first reference path loop of the first transceiver and a second reference path loop of the second transceiver by subtracting the second phase difference from the first phase difference, wherein the first reference path loop consists of the reference transmission path and the reference reception path of the first transceiver, and wherein the second reference path loop consists of the reference transmission path and the reference reception path of the second transceiver; and compensate for the inter-loop phase response difference. - View Dependent Claims (21, 22, 23, 24)
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25. An apparatus for inner-transceiver antenna calibration in a Radio Base Station (RBS) comprising a memory and a processor, wherein the memory stores machine-readable program code that, when executed by the processor, causes the apparatus to:
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collect, for each of one or more transmission paths, a first phase difference between a first signal and a first reception signal and, for each of one or more reception paths, a second phase difference between a second signal and a second reception signal, wherein the first signal is transmitted through each of the one or more transmission paths and received through a calibration reception path of the transceiver as the first reception signal, and wherein the second signal is transmitted through a calibration transmission path of the transceiver and received through each of the one or more reception paths as the second reception signal; determine, for each of one or more working path loops, each working path loop consisting of a corresponding pair of transmission and reception paths, a relative loop-back phase response difference by subtracting the second phase difference from the first phase difference, wherein the relative loop-back phase response difference is a loop-back phase response difference of the working path loop minus a loop-back phase response difference of a calibration path loop consisting of the calibration transmission path and the calibration reception path; and compensate for an inconsistency among the relative loop-back phase response differences of the one or more working path loops. - View Dependent Claims (26)
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Specification