Granted Patent B2

US 12,199,724 · App. 18/047,963 · Granted Jan 14, 2025

Inventors: Vishnu Vardhan Ratnam (Plano, TX); Shadi Abu-Surra (Plano, TX); Jianhua Mo (Allen, TX); Gang Xu (Allen, TX); Jin Yuan (Plano, TX); Ahmad AlAmmouri (Garland, TX); Boon Loong Ng (Plano, TX); Jianzhong Zhang (Dallas, TX)

Assignee: Samsung Electronics Co., Ltd.

H04B7/0667H04B7/01H04B7/0408

Abstract

Claims (89)

1. A method comprising:

determining one or more delay values and one or more phase shift values for generation of multiple desired frequency-dependent analog beams;

configuring one or more true-time delay (TTD) elements and one or more phase shifters of a transceiver based on the one or more delay values and the one or more phase shift values, the transceiver having one or more radio-frequency (RF) chains connected to multiple antennas via the one or more TTD elements and the one or more phase shifters; and

operating the transceiver to generate the multiple desired frequency-dependent analog beams, wherein the multiple desired frequency-dependent analog beams comprise at least one of:

multiple beams sweeping over a coverage region as a function of frequency;

multiple beams covering discrete angular regions on different sub-bands of a system bandwidth of the transceiver;

multiple beams sweeping over different discrete angular regions on different sub-bands; or

multiple beams covering a broadcast area at multiple frequencies, wherein for a portion of the multiple frequencies, the multiple beams do not cover a portion of the broadcast area.

2. The method of claim 1 , wherein the one or more TTD elements of the transceiver comprise at least one of:

one TTD element for each of the multiple antennas;

a first TTD element for each of the multiple antennas and a second TTD element that is shared by at least a subset of the multiple antennas, wherein a time delay of the first TTD elements is smaller than a time delay of the second TTD element;

a first TTD element for a first subset of the multiple antennas and a second TTD element for a second subset of the multiple antennas; and

multiple TTD elements for each of the multiple antennas.

3. The method of claim 2 , wherein the one or more phase shifters of the transceiver comprise at least one of:

at least one phase shifter for each of the multiple antennas;

one phase shifter and one switch for each of the multiple antennas; and

multiple phase shifters for each of the multiple antennas.

4. The method of claim 2 , wherein the transceiver further comprises:

a switch for each of the multiple antennas, wherein each switch is communicatively coupled between one of the TTD elements and one of the phase shifters.

5. The method of claim 1 , wherein the one or more delay values and the one or more phase shift values are determined using an algorithm that comprises:

updating the one or more delay values and the one or more phase shift values for fixed digital precoding;

performing at least one of clipping or rounding to ensure a maximum delay or one or more phase constraints are satisfied;

updating digital precoding for fixed delay values and fixed phase shift values; and

repeating the updating, performing, and updating in an iterative fashion until convergence or a maximum number of iterations is performed.

6. The method of claim 5 , wherein the algorithm receives, as input, at least one of:

one or more desired beam weight vectors;

one or more desired coverage angles at each of multiple frequencies; and

one or more desired beam behaviors.

7. The method of claim 1 , wherein the one or more phase shifters of the transceiver comprise at least one phase shifter for each of the multiple antennas.

8. A device comprising:

a transceiver comprising:

multiple antennas,

one or more true-time delay (TTD) elements,

one or more phase shifters, and

one or more radio-frequency (RF) chains connected to the multiple antennas via the one or more TTD elements and the one or more phase shifters; and

a processor operably connected to the transceiver, the processor configured to:

determine one or more delay values and one or more phase shift values for generation of multiple desired frequency-dependent analog beams;

configure the one or more TTD elements and the one or more phase shifters based on the one or more delay values and the one or more phase shift values; and

control the transceiver to generate the multiple desired frequency-dependent analog beams, wherein the multiple desired frequency-dependent analog beams comprise at least one of:

multiple beams sweeping over a coverage region as a function of frequency;

multiple beams covering discrete angular regions on different sub-bands of a system bandwidth of the transceiver;

multiple beams sweeping over different discrete angular regions on different sub-bands; or

multiple beams covering a broadcast area at multiple frequencies, wherein for a portion of the multiple frequencies, the multiple beams do not cover a portion of the broadcast area.

9. The device of claim 8 , wherein the one or more TTD elements of the transceiver comprise at least one of:

one TTD element for each of the multiple antennas;

a first TTD element for each of the multiple antennas and a second TTD element that is shared by at least a subset of the multiple antennas, wherein a time delay of the first TTD elements is smaller than a time delay of the second TTD element;

a first TTD element for a first subset of the multiple antennas and a second TTD element for a second subset of the multiple antennas; and

multiple TTD elements for each of the multiple antennas.

10. The device of claim 9 , wherein the one or more phase shifters of the transceiver comprise at least one of:

at least one phase shifter for each of the multiple antennas;

one phase shifter and one switch for each of the multiple antennas; and

multiple phase shifters for each of the multiple antennas.

11. The device of claim 9 , wherein the transceiver further comprises:

a switch for each of the multiple antennas, wherein each switch is communicatively coupled between one of the TTD elements and one of the phase shifters.

12. The device of claim 8 , wherein the processor is configured to determine the one or more delay values and the one or more phase shift values using an algorithm that causes the processor to:

update the one or more delay values and the one or more phase shift values for fixed digital precoding;

perform at least one of clipping or rounding to ensure a maximum delay or one or more phase constraints are satisfied;

update digital precoding for fixed delay values and fixed phase shift values; and

repeat the update, perform, and update in an iterative fashion until convergence or a maximum number of iterations is performed.

13. The device of claim 12 , wherein the algorithm receives, as input, at least one of:

one or more desired beam weight vectors;

one or more desired coverage angles at each of multiple frequencies; and

one or more desired beam behaviors.

14. The device of claim 8 , wherein the one or more phase shifters of the transceiver comprise at least one phase shifter for each of the multiple antennas.

15. A non-transitory computer readable medium comprising program code that, when executed by a processor of a device, causes the device to:

determine one or more delay values and one or more phase shift values for generation of multiple desired frequency-dependent analog beams;

configure one or more true-time delay (TTD) elements and one or more phase shifters of a transceiver based on the one or more delay values and the one or more phase shift values, the transceiver having one or more radio-frequency (RF) chains connected to multiple antennas via the one or more TTD elements and the one or more phase shifters; and

operate the transceiver to generate the multiple desired frequency-dependent analog beams, wherein the multiple desired frequency-dependent analog beams comprise at least one of:

multiple beams sweeping over a coverage region as a function of frequency;

multiple beams covering discrete angular regions on different sub-bands of a system bandwidth of the transceiver;

multiple beams sweeping over different discrete angular regions on different sub-bands; or

multiple beams covering a broadcast area at multiple frequencies, wherein for a portion of the multiple frequencies, the multiple beams do not cover a portion of the broadcast area.

16. The non-transitory computer readable medium of claim 15 , wherein the one or more TTD elements of the transceiver comprise at least one of:

one TTD element for each of the multiple antennas;

a first TTD element for each of the multiple antennas and a second TTD element that is shared by at least a subset of the multiple antennas, wherein a time delay of the first TTD elements is smaller than a time delay of the second TTD element;

a first TTD element for a first subset of the multiple antennas and a second TTD element for a second subset of the multiple antennas; and

multiple TTD elements for each of the multiple antennas.

17. The non-transitory computer readable medium of claim 16 , wherein the one or more phase shifters of the transceiver comprise at least one of:

at least one phase shifter for each of the multiple antennas;

one phase shifter and one switch for each of the multiple antennas; and

multiple phase shifters for each of the multiple antennas.

18. The non-transitory computer readable medium of claim 16 , wherein the transceiver further comprises:

a switch for each of the multiple antennas, wherein each switch is communicatively coupled between one of the TTD elements and one of the phase shifters.

19. The non-transitory computer readable medium of claim 15 , wherein the one or more delay values and the one or more phase shift values are determined using an algorithm that causes the device to:

update the one or more delay values and the one or more phase shift values for fixed digital precoding;

perform at least one of clipping or rounding to ensure a maximum delay or one or more phase constraints are satisfied;

update digital precoding for fixed delay values and fixed phase shift values; and

repeat the update, perform, and update in an iterative fashion until convergence or a maximum number of iterations is performed.

20. The non-transitory computer readable medium of claim 15 , wherein the one or more phase shifters of the transceiver comprise at least one phase shifter for each of the multiple antennas.

Assignments (2)

Continuity (3)

References Cited (29)