Google Patentsopen access

Method of using orbital angular momentum in a wireless communication system and … — Lg Electronics Inc. (US11974263B2)

ABSTRACT

Abstract

The present disclosure proposes a method using orbital angular momentum (OAM) and an apparatus therefor. The method performed by a UE may include receiving, from a base station, information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states, receiving at least one OAM beam from the base station, determining a detectable at least one OAM state based on the at least one OAM beam, and transmitting, to the base station, information for an OAM state subset including the at least one OAM state within the OAM state set.

Description

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of an earlier filing date and right of priority to Application No. 10-2020-0088507 filed on 16 Jul. 2020 in Korea, the contents of which are hereby incorporated by reference in its entirety.

BACKGROUND OF THE DISCLOSURE

Field of the Disclosure

The present disclosure relates to a wireless communication system, and, more particularly, to a method using orbital angular momentum (OAM) and an apparatus therefor.

Related Art

A mobile communication system has been developed to provide a voice service while ensuring an activity of a user. However, in the mobile communication system, not only a voice, but also a data service is extended. At present, there is the shortage of resources due to an explosive increase in traffic, and users demand a higher speed service. As a result, a more developed mobile communication system is required.

Requirements for a next-generation mobile communication system should be able to support the acceptance of explosive data traffic, a dramatic increase in the data rate per user, the acceptance of a significant increase in the number of connected devices, very low end-to-end latency, and high-energy efficiency. To this end, various technologies are researched, which include dual connectivity, massive multiple input multiple output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, device networking, and the like.

SUMMARY

Furthermore, the present disclosure proposes a method of transmitting a detectable OAM state and an apparatus therefor.

Furthermore, the present disclosure proposes a method of applying a precoding matrix (or codebook) to OAM and an apparatus therefor.

Technical objects to be achieved in the disclosure are not limited to the aforementioned technical objects, and other technical objects not described above may be evidently understood by a person having ordinary skill in the art to which the disclosure pertains from the following description.

In an aspect, the present disclosure proposes a method of transmitting a detectable orbital angular momentum (OAM) state in a wireless communication system and an apparatus therefor.

The method performed by a UE may include receiving, from a base station, information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states, receiving at least one OAM beam from the base station, determining a detectable at least one OAM state based on the at least one OAM beam, and transmitting, to the base station, information for an OAM state subset including the at least one OAM state within the OAM state set.

Furthermore, in the method of the present disclosure, the information for the OAM state set may be received through a higher layer signal, a medium access control-control element (MAC-CE), or downlink control information.

Furthermore, in the method of the present disclosure, the at least one OAM state may be determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

Furthermore, in the method of the present disclosure, the OAM state may be an orthogonal OAM state.

Furthermore, in the method of the present disclosure, an antenna array of the base station may be an antenna array forming a right-hand circular polarized beam.

Furthermore, in the method of the present disclosure, the right-hand circular polarized beam may be a beam having spin angular momentum (SAM)=−1.

Furthermore, in the method of the present disclosure, an antenna array of the base station may be an a×b array by r ring arrays.

Furthermore, in the method of the present disclosure, wherein the a×b array by r ring arrays may be based on a type-1 codebook [ν l,m φ n ] 32×1 , and

v

l

,

m

=

[

e

1

,

m

⁢

I

8

×

8

e

2

,

m

⁢

I

8

×

8

e

3

,

m

⁢

I

8

×

8

e

4

,

m

⁢

I

8

×

8

]

32

×

8

,

φ n

=

[

1

e

j ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 2 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 3 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 4 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 5 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 6 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 7 ⁢ l ⁢

2 ⁢ πθ

N

]

8 × 1

,

e k,m may be an m-th beamforming element of k-th ring array ports, I may be an OAM state, ϑ may be an angle between adjacent elements based on a center of a single ring array, N may be a maximum number of OAM states, and I may be an identity matrix.

Furthermore, in the method of the present disclosure, an antenna array of the base station may be an r ring array by a×b arrays.

Furthermore, in the method of the present disclosure, the r ring array by a×b arrays may be based on a type-1 codebook [φ n ν l,m ] 32×1 , and

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims the benefit of an earlier filing date and right of priority to Application No. 10-2020-0088507 filed on 16 Jul. 2020 in Korea, the contents of which are hereby incorporated by reference in its entirety.

BACKGROUND OF THE DISCLOSURE

Field of the Disclosure

The present disclosure relates to a wireless communication system, and, more particularly, to a method using orbital angular momentum (OAM) and an apparatus therefor.

Related Art

A mobile communication system has been developed to provide a voice service while ensuring an activity of a user. However, in the mobile communication system, not only a voice, but also a data service is extended. At present, there is the shortage of resources due to an explosive increase in traffic, and users demand a higher speed service. As a result, a more developed mobile communication system is required.

Requirements for a next-generation mobile communication system should be able to support the acceptance of explosive data traffic, a dramatic increase in the data rate per user, the acceptance of a significant increase in the number of connected devices, very low end-to-end latency, and high-energy efficiency. To this end, various technologies are researched, which include dual connectivity, massive multiple input multiple output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, device networking, and the like.

SUMMARY

Furthermore, the present disclosure proposes a method of transmitting a detectable OAM state and an apparatus therefor.

Furthermore, the present disclosure proposes a method of applying a precoding matrix (or codebook) to OAM and an apparatus therefor.

Technical objects to be achieved in the disclosure are not limited to the aforementioned technical objects, and other technical objects not described above may be evidently understood by a person having ordinary skill in the art to which the disclosure pertains from the following description.

In an aspect, the present disclosure proposes a method of transmitting a detectable orbital angular momentum (OAM) state in a wireless communication system and an apparatus therefor.

The method performed by a UE may include receiving, from a base station, information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states, receiving at least one OAM beam from the base station, determining a detectable at least one OAM state based on the at least one OAM beam, and transmitting, to the base station, information for an OAM state subset including the at least one OAM state within the OAM state set.

Furthermore, in the method of the present disclosure, the information for the OAM state set may be received through a higher layer signal, a medium access control-control element (MAC-CE), or downlink control information.

Furthermore, in the method of the present disclosure, the at least one OAM state may be determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

Furthermore, in the method of the present disclosure, the OAM state may be an orthogonal OAM state.

Furthermore, in the method of the present disclosure, an antenna array of the base station may be an antenna array forming a right-hand circular polarized beam.

Furthermore, in the method of the present disclosure, the right-hand circular polarized beam may be a beam having spin angular momentum (SAM)=−1.

Furthermore, in the method of the present disclosure, an antenna array of the base station may be an a×b array by r ring arrays.

Furthermore, in the method of the present disclosure, wherein the a×b array by r ring arrays may be based on a type-1 codebook [ν l,m φ n ] 32×1 , and

v

l

,

m

=

[

e

1

,

m

⁢

I

8

×

8

e

2

,

m

⁢

I

8

×

8

e

3

,

m

⁢

I

8

×

8

e

4

,

m

⁢

I

8

×

8

]

32

×

8

,

φ n

=

[

1

e

j ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 2 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 3 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 4 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 5 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 6 ⁢ l ⁢

2 ⁢ πθ

N

e

j ⁢ 7 ⁢ l ⁢

2 ⁢ πθ

N

]

8 × 1

,

e k,m may be an m-th beamforming element of k-th ring array ports, I may be an OAM state, ϑ may be an angle between adjacent elements based on a center of a single ring array, N may be a maximum number of OAM states, and I may be an identity matrix.

Furthermore, in the method of the present disclosure, an antenna array of the base station may be an r ring array by a×b arrays.

Furthermore, in the method of the present disclosure, the r ring array by a×b arrays may be based on a type-1 codebook [φ n ν l,m ] 32×1 , and

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

]

32

×

4

,

v

l , m

=

[

e

1 , m

e

2 , m

e

3 , m

e

4 , m

]

4 × 1

,

e k,m may be an m-th beamforming element of k-th a×b array ports, I may be an OAM state, ϑ may be an angle between adjacent a×b arrays based on a center of a ring array, N may be a maximum number of OAM states, and I may be an identity matrix.

Furthermore, in an aspect, a user equipment (UE) configured to transmit a detectable orbital angular momentum (OAM) state in a wireless communication system may include at least one transceiver, at least one processor, and at least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations. The operations may include receiving, from a base station, information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states, receiving at least one OAM beam from the base station, determining a detectable at least one OAM state based on the at least one OAM beam, and transmitting, to the base station, information for an OAM state subset including the at least one OAM state within the OAM state set.

Furthermore, in the UE of the present disclosure, the at least one OAM state may be determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

Furthermore, in the UE of the present disclosure, an antenna array of the base station may be an antenna array forming a right-hand circular polarized beam.

Furthermore, in the UE of the present disclosure, an antenna array of the base station may be an a×b array by r ring arrays, the a×b array by r ring arrays may be based on a type-1 codebook [ν l,m φ n ] 32×1 , and

v

l

,

m

=

[

e

1

,

m

⁢

1

8

×

8

e

2

,

m

⁢

1

8

×

8

e

3

,

m

⁢

1

8

×

8

e

4

,

m

⁢

1

8

×

8

]

32

×

8

,

φ n

=

[

1

e

j ⁢

l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 2 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 3 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 4 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 5 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 6 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 7 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

]

8 × 1

,

e k,m may be an m-th beamforming element of k-th ring array ports, I may be an OAM state, ϑ may be an angle between adjacent elements based on a center of a single ring array, N may be a maximum number of OAM states, and I may be an identity matrix.

Furthermore, in the UE of the present disclosure, an antenna array of the base station may be an r ring array by a×b arrays, the r ring array by a×b arrays may be based on a type-1 codebook [φ n ν l,m ] 32×1 , and

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

4

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

5

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

6

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

7

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

]

32

×

4

,

v

l , m

=

[

e

1 , m

e

2 , m

e

3 , m

e

4 , m

]

4 × 1

,

e k,m may be an m-th beamforming element of k-th a×b array ports, I may be an OAM state, ϑ may be an angle between adjacent a×b arrays based on a center of a ring array, N may be a maximum number of OAM states, and I may be an identity matrix.

Furthermore, in an aspect, a base station configured to receive a detectable orbital angular momentum (OAM) state in a wireless communication system may include at least one transceiver, at least one processor, and at least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations. The operations may include transmitting, to a user equipment (UE), information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states, transmitting at least one OAM beam to the UE, wherein a detectable at least one OAM state may be determined based on the at least one OAM beam, and receiving, from the UE, information for an OAM state subset including the at least one OAM state within the OAM state set.

Furthermore, in the base station of the present disclosure, the at least one OAM state may be determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

Furthermore, in the base station of the present disclosure, an antenna array of the base station may be an antenna array forming a right-hand circular polarized beam.

Furthermore, in the base station of the present disclosure, an antenna array of the base station may be an a×b array by r ring arrays, the a×b array by r ring arrays may be based on a type-1 codebook [ν l,m φ n ] 32×1 , and

v

l

,

m

=

[

e

1

,

m

⁢

1

8

×

8

e

2

,

m

⁢

1

8

×

8

e

3

,

m

⁢

1

8

×

8

e

4

,

m

⁢

1

8

×

8

]

32

×

8

,

φ n

=

[

1

e

j ⁢

l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 2 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 3 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 4 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 5 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 6 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

e

j ⁢ 7 ⁢ l ⁢

2 ⁢ π ⁢ θ

N

]

8 × 1

,

e k,m may be an m-th beamforming element of k-th ring array ports, I may be an OAM state, ϑ may be an angle between adjacent elements based on a center of a single ring array, N may be a maximum number of OAM states, and I may be an identity matrix.

Furthermore, in the base station of the present disclosure, an antenna array of the base station may be an r ring array by a×b arrays, the r ring array by a×b arrays may be based on a type-1 codebook [φ n ν l,m ] 32×1 , and

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

π

⁢

θ

N

⁢

I

4

×

4

<

CLAIMS

Claims ( 20 )

What is claimed is:

1. A method of transmitting a detectable orbital angular momentum (OAM) state in a wireless communication system, the method performed by a user equipment (UE) comprising:

receiving, from a base station, information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states;

receiving at least one OAM beam from the base station;

determining a detectable at least one OAM state based on the at least one OAM beam; and

transmitting, to the base station, information for an OAM state subset including the at least one OAM state within the OAM state set.

2. The method of claim 1 ,

wherein the information for the OAM state set is received through a higher layer signal, a medium access control-control element (MAC-CE), or downlink control information.

3. The method of claim 1 ,

wherein the at least one OAM state is determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

4. The method of claim 1 ,

wherein the OAM state is an orthogonal OAM state.

5. The method of claim 1 ,

wherein an antenna array of the base station is an antenna array forming a right-hand circular polarized beam.

6. The method of claim 5 ,

wherein the right-hand circular polarized beam is a beam having spin angular momentum (SAM)=−1.

7. The method of claim 1 ,

wherein an antenna array of the base station is an a×b array by r ring arrays.

8. The method of claim 7 ,

wherein the a×b array by r ring arrays is based on a type-1 codebook [ν l,m φ n ] 32×1 , and

wherein

v

l

,

m

=

[

e

1

,

m

⁢

I

8

×

8

e

2

,

m

⁢

I

8

×

8

e

3

,

m

⁢

I

8

×

8

e

4

,

m

⁢

I

8

×

8

]

32

×

8

,

φ

n

=

[

1

e

j

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

]

8

×

1

,

e k,m is an m-th beamforming element of k-th ring array ports, I is an OAM state, ϑ is an angle between adjacent elements based on a center of a single ring array, N is a maximum number of OAM states, and I is an identity matrix.

9. The method of claim 1 ,

wherein an antenna array of the base station is an r ring array by a×b arrays.

10. The method of claim 9 ,

wherein the r ring array by a×b arrays is based on a type-1 codebook [φ n ν l,m ] 32×1 , and

wherein

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

]

32

×

4

,

v

l

,

m

=

[

e

1

,

m

e

2

,

m

e

3

,

m

e

4

,

m

]

4

×

1

,

e k,m is an m-th beamforming element of k-th a×b array ports, I is an OAM state, ϑ is an angle between adjacent a×b arrays based on a center of a ring array, N is a maximum number of OAM states, and I is an identity matrix.

11. A user equipment (UE) configured to transmit a detectable orbital angular momentum (OAM) state in a wireless communication system, the UE comprising:

at least one transceiver;

at least one processor; and

at least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

receiving, from a base station, information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states;

receiving at least one OAM beam from the base station;

determining a detectable at least one OAM state based on the at least one OAM beam; and

transmitting, to the base station, information for an OAM state subset including the at least one OAM state within the OAM state set.

12. The UE of claim 11 ,

wherein the at least one OAM state is determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

13. The UE of claim 11 ,

wherein an antenna array of the base station is an antenna array forming a right-hand circular polarized beam.

14. The UE of claim 11 ,

wherein an antenna array of the base station is an a×b array by r ring arrays,

wherein the a×b array by r ring arrays is based on a type-1 codebook [ν l,m φ n ] 32×1 , and

wherein

v

l

,

m

=

[

e

1

,

m

⁢

I

8

×

8

e

2

,

m

⁢

I

8

×

8

e

3

,

m

⁢

I

8

×

8

e

4

,

m

⁢

I

8

×

8

]

32

×

8

,

φ

n

=

[

1

e

j

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

]

8

×

1

,

e k,m is an m-th beamforming element of k-th ring array ports, I is an OAM state, ϑ is an angle between adjacent elements based on a center of a single ring array, N is a maximum number of OAM states, and I is an identity matrix.

15. The UE of claim 11 ,

wherein an antenna array of the base station is an r ring array by a×b arrays,

wherein the r ring array by a×b arrays is based on a type-1 codebook [φ n ν l,m ] 32×1 , and

wherein

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

]

32

×

4

,

v

l

,

m

=

[

e

1

,

m

e

2

,

m

e

3

,

m

e

4

,

m

]

4

×

1

,

e k,m is an m-th beamforming element of k-th a×b array ports, I is an OAM state, ϑ is an angle between adjacent a×b arrays based on a center of a ring array, N is a maximum number of OAM states, and I is an identity matrix.

16. A base station configured to receive a detectable orbital angular momentum (OAM) state in a wireless communication system, the base station comprising:

at least one transceiver;

at least one processor; and

at least one memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

transmitting, to a user equipment (UE), information for an OAM state set, wherein the OAM state set includes multiple OAM state subsets, and each of the multiple OAM state subsets includes one or two or more OAM states;

transmitting at least one OAM beam to the UE, wherein a detectable at least one OAM state is determined based on the at least one OAM beam; and

receiving, from the UE, information for an OAM state subset including the at least one OAM state within the OAM state set.

17. The base station of claim 16 ,

wherein the at least one OAM state is determined based on an OAM component, received energy, and a frequency of the at least one OAM beam.

18. The base station of claim 16 ,

wherein an antenna array of the base station is an antenna array forming a right-hand circular polarized beam.

19. The base station of claim 16 ,

wherein an antenna array of the base station is an a×b array by r ring arrays,

wherein the a×b array by r ring arrays is based on a type-1 codebook [ν l,m φ n ] 32×1 , and

wherein

v

l

,

m

=

[

e

1

,

m

⁢

I

8

×

8

e

2

,

m

⁢

I

8

×

8

e

3

,

m

⁢

I

8

×

8

e

4

,

m

⁢

I

8

×

8

]

32

×

8

,

φ

n

=

[

1

e

j

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

]

8

×

1

,

e k,m is an m-th beamforming element of k-th ring array ports, I is an OAM state, ϑ is an angle between adjacent elements based on a center of a single ring array, N is a maximum number of OAM states, and I is an identity matrix.

20. The base station of claim 16 ,

wherein an antenna array of the base station is an r ring array by a×b arrays,

wherein the r ring array by a×b arrays is based on a type-1 codebook [φ n ν l,m ] 32×1 , and

wherein

φ

n

=

[

1

·

I

4

×

4

e

j

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

2

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

3

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

4

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

5

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

6

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

e

j

⁢

7

⁢

l

⁢

2

⁢

πθ

N

⁢

I

4

×

4

]

32

×

4

,

v

l

,

m

=

[

e

1

,

m

e

2

,

m

e

3

,

m

e

4

,

m

]

4

×

1

,

e k,m is an m-th beamforming element of k-th a×b array ports, I is an OAM state, ϑ is an angle between adjacent a×b arrays based on a center of a ring array, N is a maximum number of OAM states, and I is an identity matrix.

US17/476,745

2020-07-16

2021-09-16

Method of using orbital angular momentum in a wireless communication system and apparatus therefor

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Method of using orbital angular momentum in a wireless communication system and apparatus therefor

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Cited By (2)

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( en )

*

2021-07-13

2024-09-12

Qualcomm Incorporated

Open-loop transmission with transmit diversity in orbital angular momentum multiplexing based communications

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( en )

*

2021-12-02

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Orbital angular momentum based codebook for access communications

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2023-03-28

华为技术有限公司

Communication method based on orbital angular momentum OAM, network equipment and terminal equipment

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( en )

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2021-03-05

2022-09-09

Qualcomm Incorporated

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2025-04-15

Agency For Science, Technology And Research

Spatial modulation system and method thereof

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( en )

2021-06-18

2023-09-12

Qualcomm Incorporated

Beam management procedure for OAM in MMW and higher bands

US12231912B2

( en )

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2025-02-18

Qualcomm Incorporated

System and method for reporting orbital angular momentum waveform misalignment

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Qualcomm Incorporated

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Qualcomm Incorporated

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US11742923B1

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T-Mobile Innovations Llc

Variable port mapping configurations for beamforming in antenna arrays

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Qualcomm Incorporated

Reuse of data SPS DCI in EH SPS DCI

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Qualcomm Incorporated

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北京小米移动软件有限公司

Orbital angular momentum (oam) mode determination method and device

CN119183644A

( en )

<span itemprop="examin

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