METHOD AND APPARATUS FOR INTERNAL RELATIVE TRANSCEIVER CALIBRATION
First Claim
1. A method for calibrating transceiver units in an entity, each unit including an antenna element, for their use for joint transmission from the entity to at least one wireless entity, the method comprising:
- generating a plurality of processed observations corresponding to pilots transmitted by transceiver units in the entity and observations of the pilots by transceiver units in the entity, each processed observation being indicative of a combined response of a pilot transmitted by transmitter hardware of one transceiver unit at the entity and an observation of the pilot by receiver hardware of another transceiver unit at the entity;
grouping the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises;
a first observation indicative of a combined response between transmitter hardware of a first transceiver unit and receiver hardware of a second transceiver unit in the entity, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit and receiver hardware of the first transceiver unit in the entity; and
calculating, based on at least one of observation pairs, relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit and is relative with respect to a transceiver of a reference unit at the entity.
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Accused Products
Abstract
A method and apparatus is disclosed herein for internal relative transceiver calibration. In one embodiment, the method comprises generating a plurality of processed observations corresponding to pilots transmitted by transceiver units in the entity and observations of the pilots by transceiver units in the entity, each processed observation being indicative of a combined response of a pilot transmitted by transmitter hardware of one transceiver unit at the entity and an observation of the pilot by receiver hardware of another transceiver unit at the entity; grouping the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises: a first observation indicative of a combined response between transmitter hardware of a first transceiver unit and receiver hardware of a second transceiver unit in the entity, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit and receiver hardware of the first transceiver unit in the entity; and calculating, based on at least one of observation pairs, relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit and is relative with respect to a transceiver of a reference unit at the entity.
38 Citations
45 Claims
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1. A method for calibrating transceiver units in an entity, each unit including an antenna element, for their use for joint transmission from the entity to at least one wireless entity, the method comprising:
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generating a plurality of processed observations corresponding to pilots transmitted by transceiver units in the entity and observations of the pilots by transceiver units in the entity, each processed observation being indicative of a combined response of a pilot transmitted by transmitter hardware of one transceiver unit at the entity and an observation of the pilot by receiver hardware of another transceiver unit at the entity; grouping the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises;
a first observation indicative of a combined response between transmitter hardware of a first transceiver unit and receiver hardware of a second transceiver unit in the entity, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit and receiver hardware of the first transceiver unit in the entity; andcalculating, based on at least one of observation pairs, relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit and is relative with respect to a transceiver of a reference unit at the entity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A base station comprising:
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a plurality of transceivers, each transceiver of the plurality of transceivers comprising an antenna element; a calibration processor coupled to the plurality of transceivers, the calibration processor operable to generate a plurality of processed observations corresponding to pilots transmitted by transceiver units in the entity and observations of the pilots by transceiver units in the entity, each processed observation being indicative of a combined response of a pilot transmitted by transmitter hardware of one transceiver unit at the entity and an observation of the pilot by receiver hardware of another transceiver unit at the entity; group the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises a first observation indicative of a combined response between transmitter hardware of a first transceiver unit and receiver hardware of a second transceiver unit of the plurality of transceivers, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit and receiver hardware of the first transceiver unit; and calculate, based on at least one of observation pairs, relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit and is relative with respect to a transceiver of a reference unit at the base station. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An article of manufacture having one or more non-transitory computer readable media storing instructions thereon which, when executed by an entity, cause the entity to perform a method for calibrating transceiver units of the entity, each unit including an antenna element, the method comprising:
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control the antenna element of each transceiver unit to transmit at least one pilot; control the antenna elements of the plurality of transceiver units to receive one or more observations, each of the one or more observations received by one transceiver unit corresponding to receipt of the at least one pilot being transmitted from one or more other transceiver units in the plurality of transceivers; generate a plurality of processed observations, each processed observation being indicative of a combined response between transmitter hardware of one transceiver unit at the first entity and receiver hardware of another transceiver unit at the first entity; group the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises;
a first observation indicative of a combined response between transmitter hardware of a first transceiver unit and receiver hardware of a second transceiver unit in the first entity, and an second observation indicative of a combined response between transmitter hardware of the second transceiver unit and receiver hardware of the first transceiver unit in the first entity; andcalculate, based on at least one of observation pairs, relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit and is relative with respect to a transceiver of a reference unit at the first entity. - View Dependent Claims (21)
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22. A method for jointly calibrating first and second separate groups of one or more transceiver units in a communication system, each transceiver unit in the first and second groups including an antenna element, the method comprising:
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generating a plurality of processed observations corresponding to at least one pilot transmitted by at least one transceiver unit in the first group and observations of the at least one pilot by at least one transceiver unit in the second group, and at least one pilot transmitted by at least one transceiver unit in the second group and observations of the at least one pilot by at least one transceiver unit in the first group, and wherein each of the plurality of processed observations is indicative of either a combined response of a pilot transmitted by transmitter hardware of one transceiver unit in the first group and an observation of the pilot by receiver hardware of another transceiver unit in the second group or a combined response of a pilot transmitted by transmitter hardware of one transceiver unit in the second group and an observation of the pilot by receiver hardware of another transceiver unit in the first group; grouping the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises;
a first observation indicative of a combined response between transmitter hardware of a first transceiver unit in the first group and receiver hardware of a second transceiver unit in the second group, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit in the second group and receiver hardware of the first transceiver unit in the first group; andcalculating, based on at least one of observation pairs, estimates of relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit in the first and second groups and is relative with respect to a transceiver of a reference unit. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A communication system comprising:
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a first group of transceiver units, each transceiver unit of the first group comprising an antenna element; a second group of transceiver units, each transceiver unit of the second group comprising an antenna element; at least one calibration processor coupled to the first and second groups, the calibration processor operable to generate a plurality of processed observations corresponding to at least one pilot transmitted by at least one transceiver unit in the first group and observations of the at least one pilot by at least one transceiver unit in the second group, and at least one pilot transmitted by at least one transceiver unit in the second group and observations of the at least one pilot by at least one transceiver unit in the first group, and wherein each of the plurality of processed observations is indicative of either a combined response of a pilot transmitted by transmitter hardware of one transceiver unit in the first group and an observation of the pilot by receiver hardware of another transceiver unit in the second group or a combined response of a pilot transmitted by transmitter hardware of one transceiver unit in the second group and an observation of the pilot by receiver hardware of another transceiver unit in the first group; group the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises;
a first observation indicative of a combined response between transmitter hardware of a first transceiver unit in the first group and receiver hardware of a second transceiver unit in the second group, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit in the second group and receiver hardware of the first transceiver unit in the first group; andcalculate, based on at least one of observation pairs, estimates of relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit in the first and second groups and is relative with respect to a transceiver of a reference unit. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. An article of manufacture having one or more non-transitory computer readable media storing instructions thereon which, when executed by an entity, cause the entity to perform a method for calibrating first and second groups of transceiver units in an entity, each transceiver unit including an antenna element, the method comprising:
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generating a plurality of processed observations corresponding to pilots transmitted by transceiver units in the first group and observations of the pilots by transceiver units in the second group, each of the plurality of processed observations being indicative of a combined response of a pilot transmitted by transmitter hardware of one transceiver unit in the first group and an observation of the pilot by receiver hardware of another transceiver unit in the second group; grouping the plurality of processed observations into one or more observation pairs, where each observation pair of the one or more observation pairs comprises;
a first observation indicative of a combined response between transmitter hardware of a first transceiver unit in the first group and receiver hardware of a second transceiver unit in the second group, and a second observation indicative of a combined response between transmitter hardware of the second transceiver unit in the second group and receiver hardware of the first transceiver unit in the first group; andcalculating, based on at least one of observation pairs, estimates of relative calibration values, where each relative calibration value is associated with a transceiver of each transceiver unit in the first and second groups and is relative with respect to a transceiver of a reference unit.
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41. A method for use in a wireless communication system, the method comprising:
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calibrating a plurality of groups of transceiver units based on pilot transmissions and observations of the pilot transmissions within each group, each of the groups of transceiver units having a plurality of transceiver units and is calibrated with respect to a reference unit; performing inter-calibration of the plurality of groups by calibrating reference units of the plurality of groups relative to one reference unit in one of the plurality of groups.
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42. A method of signaling for jointly calibrating transceiver units in two base stations, each transceiver unit including an antenna element, for joint transmission from a set of base stations, which include the two base stations, to at least one other wireless entity, the method comprising:
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transmitting at least one pilot from at least one transceiver unit of the first base station as part of a first transmission round, and receiving observations from at least one transceiver unit of the second base station; transmiting, as part of a second transmission round, at least one pilot from at least one transceiver unit from the set of transceiver units in the second base-station which received observations in response to the at least one pilot transmitted as part of the first transmission; sending one or more observations from the at least one unit in the first base station to at least one unit of the second base station in response to the at least one pilot transmitted from the at least one unit of the second base station, the at least one transceiver unit in the first base station having transmitted the at least one pilot in the first transmission round. - View Dependent Claims (43, 44, 45)
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Specification