Increasing wireless spectral efficiency by leveraging interfering signals

• US 10,355,727 B2
• Filed: 12/20/2017
• Issued: 07/16/2019
• Est. Priority Date: 06/30/2017
• Status: Active Grant

• Current Assignee: T-Mobile USA, Inc. (Deutsche Telekom AG)
• Original Assignee: T-Mobile USA, Inc. (Deutsche Telekom AG)
• Inventors: Zhang, Hongliang, Ahmet, Jeff, Arcot Kumar, Dinesh, Gronstad, Egil, Olsen, Brian Allan, McDiarmid, Mark
• Primary Examiner(s): Guarino, Rahel
• Application Number:
  US15/849,502
• Publication Number:
  US 20190007079A1
• Time in Patent Office: 573 Days
• CPC Class Codes: G06F 17/12 Simultaneous equations , e.g. systems of linear equations
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 2001/1045 Adjacent-channel interference
• CPC Class Codes: H04B 2001/1072 by tuning the receiver frequency
• CPC Class Codes: H04L 25/03038 with a non-recursive structure H04L25/03031 takes precedence
• CPC Class Codes: H04L 25/03331 Arrangements for the joint estimation of multiple sequences
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A computing system may utilize interfering signals of two or more wireless devices for improving communications involving the two or more wireless devices. These techniques and architectures may allow for improved spectral efficiency that enables a relatively large number of wireless devices to communicate among one another via receivers that share overlapping or adjacent frequencies. Such utilization of interfering signals may help solve a general problem involving, for example, co-channel interference (CCI) arising from densely deployed relatively small wireless communication cells for increasing communication throughput.

Claims

1. A computer-implemented method comprising:

receiving a first signal from a first receiver, wherein the first signal includes (i) a first principle component generated by a first wireless device and (ii) a first interfering component generated by a second wireless device;

receiving a second signal from a second receiver, wherein the second signal includes (i) a second principle component generated by the second wireless device and (ii) a second interfering component generated by the first wireless device;

forming a first linear equation based, at least in part, on the first signal from the first receiver;

forming a second linear equation based, at least in part, on the second signal from the second receiver; and

simultaneously solving the first linear equation and the second linear equation to (i) decouple the first principle component generated by the first wireless device from the first interfering component generated by the second wireless device and (ii) decouple the second principle component generated by the second wireless device from the second interfering component generated by the first wireless device.

2. The computer-implemented method of claim 1, wherein a first frequency at which the first receiver receives the first signal overlaps with a second frequency at which the second receiver receives the second signal.

3. The computer-implemented method of claim 1, wherein the first receiver and the second receiver are cellular towers.

4. The computer-implemented method of claim 3, wherein the first wireless device and the second wireless device each have a line of sight to both the first receiver and the second receiver.

5. The computer-implemented method of claim 1, further comprising:

receiving a third signal from a third receiver, wherein the third signal includes (i) a third principle component generated by the first wireless device and (ii) a third interfering component generated by the second wireless device;

comparing a magnitude of the third signal to a predetermined threshold;

if the magnitude of the third signal is greater than the predetermined threshold;

forming a third linear equation based, at least in part, on the third signal from the third receiver; and

simultaneously solving the first linear equation, the second linear equation, and the third linear equation to (i) decouple the first principle component generated by the first wireless device from the first interfering component generated by the second wireless device, (ii) decouple the second principle component generated by the second wireless device from the second interfering component generated by the first wireless device, and iii) decouple the third principle component generated by the first wireless device from the third interfering component generated by the second wireless device; and

if the magnitude of the third signal is less than the predetermined threshold;

simultaneously solving the first linear equation and the second linear equation without considering the third signal.

6. The computer-implemented method of claim 1, wherein the first receiver and the second receiver are configured to operate based on multi-user multiple-input and multiple-output (MIMO) processes.

7. The computer-implemented method of claim 1, wherein the first signal from the first receiver and the second signal from the second receiver are received by a base-band unit (BBU).

8. An apparatus comprising:

a non-transitory storage medium; and

instructions stored in the non-transitory storage medium, the instructions being executable by the apparatus to;

receive first signal data from a first receiver, wherein the first signal data includes (i) a first principle component generated by a first wireless device and (ii) a second interfering component generated by a second wireless device;

receive second signal data from a second receiver, wherein the second signal includes (i) a second principle component generated by the second wireless device and (ii) a second interfering component generated by the first wireless device;

form a first linear equation based, at least in part, on the first signal data from the first receiver;

form a second linear equation based, at least in part, on the second signal data from the second receiver; and

simultaneously solve the first linear equation and the second linear equation to (i) decouple the first principle component generated by the first wireless device from the first interfering component generated by the second wireless device and (ii) decouple the second principle component generated by the second wireless device from the second interfering component generated by the first wireless device.

9. The apparatus of claim 8, wherein a first frequency at which the first receiver receives a first signal on which the first signal data is based overlaps with a second frequency at which the second receiver receives a second signal on which the second signal data is based.

10. The apparatus of claim 8, wherein the first receiver and the second receiver are cellular towers.

11. The apparatus of claim 10, wherein the first wireless device and the second wireless device each have a line of sight to both the first receiver and the second receiver.

12. The apparatus of claim 8, wherein the instructions are further executable by the apparatus to:

receive a third signal from a third receiver, wherein the third signal includes (i) a third principle component generated by the first wireless device and (ii) a third interfering component generated by the second wireless device;

compare a magnitude of the third signal to a predetermined threshold;

if the magnitude of the third signal is greater than the predetermined threshold;

form a third linear equation based, at least in part, on the third signal from the third receiver; and

simultaneously solve the first linear equation, the second linear equation, and the third linear equation to (i) decouple the first principle component generated by the first wireless device from the first interfering component generated by the second wireless device, (ii) decouple the second principle component generated by the second wireless device from the second interfering component generated by the first wireless device, and iii) decouple the third principle component generated by the first wireless device from the third interfering component generated by the second wireless device; and

if the magnitude of the third signal is less than the predetermined threshold;

simultaneously solve the first linear equation and the second linear equation without considering the third signal.

13. The apparatus of claim 8, wherein the first receiver and the second receiver are configured to operate based on multi-user multiple-input and multiple-output (MIMO) processes.

14. A wireless communication network comprising:

one or more processors;

a non-transitory storage medium; and

instructions stored in the non-transitory storage medium, the instructions being executable by the one or more processors to;

receive first signal data from a first receiver, wherein the first signal data includes (i) a first principle component generated by a first wireless device and (ii) a first interfering component generated by a second wireless device;

receive second signal data from a second receiver, wherein the second signal includes (i) a second principle component generated by the second wireless device and (ii) a second interfering component generated by the first wireless device;

form a first linear equation based, at least in part, on the first signal data from the first receiver;

form a second linear equation based, at least in part, on the second signal data from the second receiver; and

simultaneously solve the first linear equation and the second linear equation to (i) decouple the first principle component generated by the first wireless device from the first interfering component generated by the second wireless device and (ii) decouple the second principle component generated by the second wireless device from the second interfering component generated by the first wireless device.

15. The wireless communication network of claim 14, wherein a first frequency at which the first receiver receives a first signal on which the first signal data is based overlaps with a second frequency at which the second receiver receives a second signal on which the second signal data is based.

16. The wireless communication network of claim 14, wherein the first receiver and the second receiver are cellular towers.

17. The wireless communication network of claim 16, wherein the first wireless device and the second wireless device each have a line of sight to both the first receiver and the second receiver.

18. The wireless communication network of claim 14, wherein the instructions are further executable by the one or more processors to:

receive a third signal from a third receiver, wherein the third signal includes (i) a third principle component generated by the first wireless device and (ii) a third interfering component generated by the second wireless device;

form a third linear equation based, at least in part, on the third signal from the third receiver; and

simultaneously solve the first linear equation, the second linear equation, and the third linear equation to (i) decouple the first principle component generated by the first wireless device from the first interfering component generated by the second wireless device, (ii) decouple the second principle component generated by the second wireless device from the second interfering component generated by the first wireless device, and iii) decouple the third principle component generated by the first wireless device from the third interfering component generated by the second wireless device.

19. The wireless communication network of claim 14, wherein the first receiver and the second receiver are configured to operate based on multi-user multiple-input and multiple-output (MIMO) processes.

20. The wireless communication network of claim 14, wherein the first signal data from the first receiver and the second signal data from the second receiver are received by a base-band unit (BBU).