Channel compression matrix parameters

Patent metadata

Field	Value
Publication number	US-10868602-B2
Application number	US-201916252213-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 19, 2018
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

One apparatus includes a processor and a radio transceiver that receives a set of reference signals transmitted from transmission point. The processor selects a subset of beams from a plurality of orthogonal beams based on the received set of reference signals and computes sets of amplitude and phase parameters for one or more channel compression matrices. In some embodiments, each channel compression matrix corresponds to one transmission layer of a multiple-layer transmission and each channel compression matrix is comprised of one or more column vectors. The processor controls the radio transceiver to send indications of the sets of amplitude and phase parameters.

First claim

What is claimed is:

1. A method in a wireless device comprising:
receiving a set of reference signals transmitted from a network entity in a wireless communication system;
selecting a subset of beams from a plurality of orthogonal beams based on the received set of reference signals;
computing sets of amplitude and phase parameters for one or more channel compression matrices,
wherein each channel compression matrix corresponds to one transmission layer of a multiple-layer transmission,
wherein each channel compression matrix is composed of one or more column vectors; and

sending indications of the sets of amplitude and phase parameters to one or more network entities in the wireless communication system.

2. The method of claim 1 , wherein a number of column vectors which compose each channel compression matrix is less than a number of beams in the selected subset of beams.

3. The method of claim 1 , wherein each set of amplitude and phase parameters parameterizes one column of the channel compression matrix.

4. The method of claim 3 , wherein the sets of amplitude and phase parameters comprise:
polarization-specific amplitude coefficient parameters,
polarization-specific phase coefficient parameters, and
polarization amplitude offset coefficient parameters.

5. The method of claim 4 ,
wherein the polarization-specific amplitude coefficient parameters form a polarization-specific amplitude vector,
wherein the polarization-specific phase coefficient parameters form a polarization-specific phase vector, and
wherein the polarization amplitude offset coefficient parameters form a polarization amplitude offset vector.

6. The method of claim 4 , further comprising:
identifying a largest polarization-specific amplitude coefficient parameter of the polarization-specific amplitude coefficient parameters for each polarization, wherein the largest polarization-specific amplitude coefficient parameter becomes a reference entry for that polarization; and
quantizing, for each polarization, all other polarization-specific amplitude coefficient parameters for that polarization relative to the reference entry for that polarization.

7. The method of claim 4 , further comprising:
identifying a largest polarization amplitude offset coefficient parameter of the polarization amplitude offset coefficient parameters for each polarization, wherein the largest polarization amplitude offset coefficient parameter becomes a reference entry for that polarization; and
quantizing, for each polarization, all other polarization amplitude offset coefficient parameters for that polarization relative to the reference entry for that polarization.

8. The method of claim 3 , wherein the sets of amplitude and phase parameters comprise:
polarization-common amplitude coefficient parameters,
polarization-specific phase coefficient parameters, and
polarization amplitude offset coefficient parameters.

9. The method of claim 8 ,
wherein the polarization-common amplitude coefficient parameters form a polarization-common amplitude vector,
wherein the polarization-specific phase coefficient parameters form a polarization-specific phase vector, and
wherein the polarization amplitude offset coefficient parameters form a polarization amplitude offset vector.

10. The method of claim 8 , further comprising:
identifying a largest polarization-common amplitude coefficient parameter of the polarization-common amplitude coefficient parameters for each polarization, wherein the largest polarization-common amplitude coefficient parameter becomes a reference entry for that polarization; and
quantizing, for each polarization, all other polarization-common amplitude coefficient parameters for that polarization relative to the reference entry for that polarization.

11. The method of claim 8 , further comprising:
identifying a largest polarization amplitude offset coefficient parameter of the polarization amplitude offset coefficient parameters for each polarization, wherein the largest polarization amplitude offset coefficient parameter becomes a reference entry for that polarization; and
quantizing, for each polarization, all other polarization amplitude offset coefficient parameters for that polarization relative to the reference entry for that polarization.

12. The method of claim 3 , wherein the sets of amplitude and phase parameters comprise:
polarization-common amplitude coefficient parameters,
polarization-common phase coefficient parameters,
polarization amplitude offset coefficient parameters, and
polarization phase offset coefficient parameters.

13. The method of claim 12 ,
wherein the polarization-common amplitude coefficient parameters form a polarization-common amplitude vector,
wherein the polarization-common phase coefficient parameters form a polarization-common phase vector,
wherein the polarization amplitude offset coefficient parameters form a polarization amplitude offset vector, and
wherein the polarization phase offset coefficient parameters form a polarization phase vector.

14. The method of claim 12 , further comprising:
identifying a largest polarization-common amplitude coefficient parameter of the polarization-common amplitude coefficient parameters for each polarization, wherein the largest polarization-common amplitude coefficient parameter becomes a reference entry for that polarization; and
quantizing, for each polarization, all other polarization-common amplitude coefficient parameters for that polarization relative to the reference entry for that polarization.

15. The method of claim 12 , further comprising:
identifying a largest polarization amplitude offset coefficient parameter of the polarization amplitude offset coefficient parameters for each polarization, wherein the largest polarization amplitude offset coefficient parameter becomes a reference entry for that polarization; and
quantizing, for each polarization, all other polarization amplitude offset coefficient parameters for that polarization relative to the reference entry for that polarization.

16. A wireless device comprising:
a radio transceiver that receives a set of reference signals transmitted from a transmission point; and
a processor that:
selects a subset of beams from a plurality of orthogonal beams based on the received set of reference signals;
computes sets of amplitude and phase parameters for one or more channel compression matrices,
wherein each channel compression matrix corresponds to one transmission layer of a multiple-layer transmission,
wherein each channel compression matrix is comprised of one or more column vectors; and

controls the radio transceiver to send indications of the sets of amplitude and phase parameters to one or more network entities is a mobile communication network.

17. The wireless device of claim 16 , wherein each set of amplitude and phase parameters parameterizes one column of a channel compression matrix.

18. The wireless device of claim 16 , wherein the sets of amplitude and phase parameters comprise:
polarization-specific amplitude coefficient parameters,
polarization-specific phase coefficient parameters, and
polarization amplitude offset coefficient parameters.

19. The wireless device of claim 16 , wherein the sets of amplitude and phase parameters comprise:
polarization-common amplitude coefficient parameters,
polarization-specific phase coefficient parameters, and
polarization amplitude offset coefficient parameters.

20. The wireless device of cla

Assignees

• Lenovo Singapore Pte Ltd

Inventors

• Song Jiho
• Brown Tyler

Classifications

• H04B7/06952

  Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping · CPC title

• H04B7/0617

  for beam forming · CPC title

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04B7/0619 Primary

  using feedback from receiving side (feedback signaling for adaptive modulation/coding H04L1/0001) · CPC title

• A01D34/4165

  Mounting of the cutter head · CPC title