Communication system, network element and method for antenna array calibration
First Claim
1. A network element for a wireless communication system locatable to couple at least one base station to an antenna array comprising a plurality of antenna elements, wherein the network element comprises:
- a plurality of independent transceiver circuits coupled to at least one of a plurality of respective antenna elements of the antenna array;
logic for applying at least one complex digital signal to at least one transceiver of a transceiver circuit of the plurality of independent transceiver circuits to produce a radio frequency translated version of the at least one complex digital signal;
at least two feedback paths arranged to provide feedback of a radio frequency translated version of at least one complex digital signal such that the at least one fed back complex digital signal facilitates a determination of latency mismatch error response between at least two transceiver signal paths;
processing logic arranged to provide latency mismatch error determination and Determine a path having a greatest latency; and
adjustment means comprising delay logic arranged to apply latency correction coefficients to the at least one fed back complex digital signal output to/from the at least one transceiver to normalize latency across a plurality of transceiver paths to the path having the greatest latency.
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Abstract
A network element for a wireless communication system is locatable to couple at least one base station to an antenna array comprising a plurality of antenna elements. The network element comprises a plurality of independent transceiver circuits coupled to at least one of a plurality of respective antenna elements of the antenna array; and logic arranged to apply at least one complex digital signal to at least one transceiver signal path of a transceiver circuit of the plurality of independent transceiver circuits. A feedback path is arranged to provide feedback of the at least one complex digital signal such that it is capable of facilitating determination of latency mismatch error response between at least two transceiver signal paths. Adjustment means comprises delay logic arranged to receive a complex digital signal and provide a modified representation of the received complex digital signal in response to the latency mismatch error response of the at least two transceiver signal path.
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Citations
16 Claims
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1. A network element for a wireless communication system locatable to couple at least one base station to an antenna array comprising a plurality of antenna elements, wherein the network element comprises:
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a plurality of independent transceiver circuits coupled to at least one of a plurality of respective antenna elements of the antenna array; logic for applying at least one complex digital signal to at least one transceiver of a transceiver circuit of the plurality of independent transceiver circuits to produce a radio frequency translated version of the at least one complex digital signal; at least two feedback paths arranged to provide feedback of a radio frequency translated version of at least one complex digital signal such that the at least one fed back complex digital signal facilitates a determination of latency mismatch error response between at least two transceiver signal paths; processing logic arranged to provide latency mismatch error determination and Determine a path having a greatest latency; and adjustment means comprising delay logic arranged to apply latency correction coefficients to the at least one fed back complex digital signal output to/from the at least one transceiver to normalize latency across a plurality of transceiver paths to the path having the greatest latency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for calibrating an antenna array by a network element comprising a plurality of independent transceiver circuits coupled to at least one of a plurality of respective antenna elements of the antenna array, wherein the method comprises:
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applying at least one complex digital signal to at least one transceiver of a transceiver circuit of the plurality of independent transceiver circuits; producing a radio frequency translated version of the at least one complex digital signal; feeding back the radio frequency translated version of at least one complex digital signal from the at least one transceiver signal path such that the at least one fed back complex digital signal facilitates a determination of latency mismatch error response between at least two transceiver signal paths; and providing latency mismatch error determination; determining a path having a greatest latency; and applying latency correction coefficients to the at least one fed back complex digital signal output to/from the at least one transceiver to normalize latency across a plurality of transceiver paths to the path having the greatest latency. - View Dependent Claims (15)
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16. A communication system comprising a network element for coupling at least one base station to an antenna array comprising a plurality of antenna elements, wherein the network element comprises:
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a plurality of independent transceiver circuits coupled to at least one of a plurality of respective antenna elements of the antenna array; logic for applying at least one complex digital signal to at least one transceiver of a transceiver circuit of the plurality of independent transceiver circuits to produce a radio frequency translated version of the at least one complex digital signal; at least two feedback paths arranged to provide feedback of a radio frequency translated version of at least one complex digital signal such that the at least one fed back complex digital signal facilitates a determination of latency mismatch error response between at least two transceiver signal paths; processing logic arranged to provide latency mismatch error determination and determine a path having a greatest latency; and adjustment means comprising delay logic arranged to apply latency correction coefficients to the at least one fed back complex digital signal output to/from the at least one transceiver to normalize latency across a plurality of transceiver paths to the path having the greatest latency.
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Specification