Facilitation of passive intermodulation cancelation via machine learning

• US 10,187,098 B1
• Filed: 06/30/2017
• Issued: 01/22/2019
• Est. Priority Date: 06/30/2017
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Tsui, Ernest, Maxwell, Paul, Ye, Weihua
• Primary Examiner(s): Phu, Sanh D
• Application Number:
  US15/640,382
• Publication Number:
  US 20190007078A1
• Time in Patent Office: 571 Days
• Field of Search: 455296
• CPC Class Codes: G06N 20/00 Machine learning
• CPC Class Codes: H04B 1/0466 Fault detection or indication H04B1/0483 takes precedence
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 1/109 by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
• CPC Class Codes: H04B 17/11 for calibration
• CPC Class Codes: H04B 17/21 for calibration; for correcting measurements

Abstract

A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. A passive intermodulation cancelation system can generate an equivalent signal to a received interference signal and use the equivalent signal to generate an error signal. The error signal can then be used to reinforce a learning system and converge on a steady state of the interference signal to cancel other interference signals.

Claims

1. A method, comprising:

determining, by a network device, comprising a processor, of a wireless network, a first signal interference of a first signal at a reception port;

determining, by the network device, an interference product associated with the first signal interference;

based on the determining, ranking, by the network device, the interference product according to a magnitude of the first signal interference, resulting in a first ranked interference signal;

based on a rank of the first ranked interference signal, generating a second signal interference; and

utilizing, by the network device, a channel associated with a transmitter port and the reception port to facilitate modification of a second signal to be sent from the transmitter port to the reception port.

2. The method of claim 1, further comprising:

in response to the ranking, generating, by the network device, the channel associated with the transmitter port and the reception port to modify a transmission signal associated with the transmitter port.

3. The method of claim 2, further comprising:

based on the transmission signal, estimating, by the network device, an interference signal at the reception port, resulting in an estimated signal.

4. The method of claim 3, further comprising:

subtracting, by the network device, the estimated signal from the first ranked interference signal, resulting in an error signal.

5. The method of claim 4, further comprising:

based on the error signal, canceling, by the network device, the signal interference associated with the reception port.

6. The method of claim 4, wherein the estimated signal is a first estimated signal, and further comprising:

utilizing, by the network device, the error signal to determine a second estimated signal.

7. The method of claim 6, further comprising:

based on the error signal and the second estimated signal, modifying, by the network device, a third estimated signal.

8. The method of claim 1, further comprising:

generating a second ranked interference signal in accordance with a limit on physical resource block utilization of the wireless network.

9. A system, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;

determining a first signal interference associated with a first signal received by a receiver device;

determining an interference product as a function of the first signal interference;

based on the interference product, generating rank data representative of a rank of the first signal interference, and applying the rank data to the first signal interference to generate a ranked interference signal;

based on the rank data, generating a second signal interference; and

utilizing a channel associated with a transmitter device and the receiver device to facilitate modification of a second signal to be sent from the transmitter device to the receiver device.

10. The system of claim 9, wherein the operations further comprise:

estimating the second signal interference, associated with the second signal, resulting in an estimated signal.

11. The system of claim 10, wherein the operations further comprise:

subtracting a first value associated with the estimated signal from a second value associated with the ranked interference signal, resulting in an error signal.

12. The system of claim 11, wherein the operations further comprise:

based on the error signal, canceling the second signal interference associated with the second signal.

13. The system of claim 12, wherein the operations further comprise:

routing the second signal to a canceler device associated with the receiver device, to cancel a third signal interference.

14. The system of claim 12, wherein the estimated signal is a first estimated signal, and wherein the operations further comprise:

in response to the canceling the second signal interference, determining a second estimated signal.

15. A non-transitory machine-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:

receiving first signal data related to a transmission signal from a transmission port device to a reception port device, wherein a first signal interference associated with the transmission signal is determined to be present at the reception port device;

based on determining an interference product associated with the first signal interference, ranking the interference product, resulting in rank data;

based on a result of ranking the signal interference in accordance with the rank data, generating a ranked interference signal;

based on the rank data, generating a second signal interference; and

utilizing a channel associated with the transmission port device and the reception port device to facilitate modification of a second signal to be sent from the transmission port device to the reception port device.

16. The non-transitory machine-readable storage medium of claim 15, wherein the transmission signal is a first transmission signal, and wherein the operations further comprise:

generating the channel associated with the transmission port device and the reception port device to modify a second transmission signal from the transmission port device to the reception port device.

17. The non-transitory machine-readable storage medium of claim 16, wherein the signal interference is first signal interference, and wherein the operation further comprise:

based on the second transmission signal, estimating the second signal interference experienced by the reception port device do to the second transmission signal.

18. The non-transitory machine-readable storage medium of claim 17, wherein the operations further comprise:

reducing a first value associated with the ranked interference signal by a second value associated with the second signal interference, resulting in a third value associated with an error signal.

19. The non-transitory machine-readable storage medium of claim 18, wherein the operations further comprise:

utilizing the third value to determine a third signal interference of a third signal.

20. The non-transitory machine-readable storage medium of claim 15, wherein the ranking the signal interference comprises ranking the signal interference in accordance with a constraint on utilization of a physical resource block of a wireless network.