Codebook and feedback design for high order MIMO
First Claim
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1. A method for wireless communications by a base station, comprising:
- mapping N physical antennas arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions;
transmitting reference signals (RS) via the K virtual antennas; and
receiving, from a user equipment (UE), feedback based on the RS transmitted on the K virtual antennas, wherein a timeline for UE feedback reporting is dependent on a number of transmit antennas of the base station.
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Abstract
Aspects of the present disclosure relate to techniques that may be utilized in networks with base stations and/or mobile devices that use large number of antennas or multi-dimensional arrays of antennas. According to certain aspects, a method for wireless communications is provided. The method may be performed, for example, by a base station and generally includes mapping N physical antennas arranged in at least two dimensions to K virtual antennas, wherein K is less than N, transmitting reference signals (RS) via the K virtual antennas, and receiving, from a user equipment, feedback based on the RS transmitted on the K virtual antennas.
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Citations
69 Claims
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1. A method for wireless communications by a base station, comprising:
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mapping N physical antennas arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions; transmitting reference signals (RS) via the K virtual antennas; and receiving, from a user equipment (UE), feedback based on the RS transmitted on the K virtual antennas, wherein a timeline for UE feedback reporting is dependent on a number of transmit antennas of the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for wireless communications by a user equipment (UE), comprising:
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receiving information regarding mapping of N physical antennas of a base station arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions; receiving reference signals (RS) transmitted from the base station via the K virtual antennas; and transmitting, to the base station, feedback based on the RS, wherein a timeline for transmitting the feedback is dependent on a number of transmit antennas of the base station. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. An apparatus for wireless communications by a base station, comprising:
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means for mapping N physical antennas arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions; means for transmitting reference signals (RS) via the K virtual antennas; and means for receiving, from a user equipment (UE), feedback based on the RS transmitted on the K virtual antennas, wherein a timeline for UE feedback reporting is dependent on a number of transmit antennas of the base station. - View Dependent Claims (53, 54, 55, 56, 57)
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58. An apparatus for wireless communications by a user equipment (UE), comprising:
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means for receiving information regarding mapping of N physical antennas of a base station arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions; means for receiving reference signals (RS) transmitted from the base station via the K virtual antennas; and means for transmitting, to the base station, feedback based on the RS, wherein a timeline for transmitting the feedback is dependent on a number of transmit antennas of the base station. - View Dependent Claims (59, 60, 61, 62, 63)
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64. An apparatus for wireless communications by a base station, comprising:
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at least one processor configured to map N physical antennas arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the map comprises spatial sampling in both vertical and horizontal directions, transmit reference signals (RS) via the K virtual antennas, and receive from a user equipment (UE), feedback based on the RS transmitted on the K virtual antennas, wherein a timeline for UE feedback reporting is dependent on a number of transmit antennas of the base station; and a memory coupled with the at least one processor. - View Dependent Claims (65)
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66. An apparatus for wireless communications by a user equipment (UE), comprising:
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at least one processor configured to receive information regarding mapping of N physical antennas of a base station arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions, receive reference signals (RS) transmitted from the base station via the K virtual antennas, and transmit, to the base station, feedback based on the RS, wherein a timeline for transmitting the feedback is dependent on a number of transmit antennas of the base station; and a memory coupled with the at least one processor. - View Dependent Claims (67)
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68. A non-transitory computer readable medium for wireless communications by a base station the non-transitory computer readable medium having instructions stored thereon for:
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mapping N physical antennas arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions; transmitting reference signals (RS) via the K virtual antennas; and receiving, from a user equipment (UE), feedback based on the RS transmitted on the K virtual antennas, wherein a timeline for UE feedback reporting is dependent on a number of transmit antennas of the base station.
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69. A non-transitory computer readable medium for wireless communications by a user equipment (UE), the non-transitory computer readable medium having instructions stored thereon for:
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receiving information regarding mapping of N physical antennas of a base station arranged in at least two dimensions to K virtual antennas, wherein K is less than N, and wherein the mapping comprises spatial sampling in both vertical and horizontal directions; receiving reference signals (RS) transmitted from the base station via the K virtual antennas; and transmitting, to the base station, feedback based on the RS, wherein a timeline for transmitting the feedback is dependent on a number of transmit antennas of the base station.
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Specification