Compensating for unwanted interference in a communications receiver

Patent metadata

Field	Value
Publication number	US-10158445-B2
Application number	US-201113174467-A
Country	US
Kind code	B2
Filing date	Jun 30, 2011
Priority date	Sep 30, 2010
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

Method and apparatuses are disclosed to substantially compensate for various unwanted interferences and/or distortions within a communications receiver. Each of these apparatuses and methods estimate the various unwanted interferences and/or distortions within the communications receiver. Each of these apparatuses and methods remove the estimates of the various unwanted interferences and/or distortions within the communications receiver from one or more communications signals within the communications receiver to substantially compensate for the various unwanted interferences and/or distortions.

First claim

What is claimed is:

1. A front end module for cancelling interference imposed on a received communications signal, comprising:
a receiving module configured to provide a primary communications signal based on the received communications signal and the interference, and to provide a secondary communications signal based on the interference, the secondary communications signal being different from the primary communications signal;
a front end processor configured to process the primary communications signal to provide an observed sequence of data;
an estimation module configured to process the secondary communications signal to estimate interference remaining within the observed sequence of data after processing of the primary communications signal to provide an estimate of the interference remaining within the observed sequence of data; and
an adjustment module configured to receive the observed sequence of data and to substantially remove the estimate of the interference remaining within the observed sequence of data from the received observed sequence of data to provide a digital sequence of data.

2. The front end module of claim 1 , wherein the interference comprises:
electromagnetic radiation propagating throughout a communications environment.

3. The front end module of claim 2 , wherein the front end module is implemented as part of a communications receiver within the communications environment, and wherein the electromagnetic radiation comprises one of:
internal electromagnetic radiation that is generated by the communication receiver; or
external electromagnetic radiation that is generated within the communications environment that originates outside the communication receiver.

4. The front end module of claim 1 , wherein the receiving module comprises:
a receiving antenna configured to observe the interference to provide the secondary communications signal.

5. The front end module of claim 1 , wherein the front end processor comprises:
a front end component configured and arranged to form a signal processing path to process the primary communications signal.

6. The front end module of claim 5 , wherein the front end component comprises:
an amplifier module;
a mixer module;
an analog to digital converter; or
a channelizer module.

7. The front end module of claim 5 , wherein the estimation module comprises:
a replica component configured and arranged to form a second signal processing path.

8. The front end module of claim 7 , wherein the replica component comprises:
an amplifier module;
a mixer module;
an analog to digital converter; or
a channelizer module.

9. The front end module of claim 7 , wherein the second signal processing path is configured and arranged to be substantially similar to the signal processing path.

10. The front end module of claim 5 , wherein the front end component is configured to impose distortion onto a signal of the signal processing path, and
wherein the estimation module is further configured to process the secondary communications signal to estimate distortion remaining within the observed sequence of data after processing of the primary communications signal to provide the estimate of the interference remaining within the observed sequence of data.

11. The front end module of claim 10 , wherein the front end component is configured to alter another signal within the signal processing path to impose the distortion into the signal of the signal processing path.

12. The front end module of claim 1 , wherein the adjustment module is further configured to substantially align the estimate of the interference remaining within the observed sequence of data with the interference remaining within the received observed sequence of data to provide a replica of the interference remaining within the observed sequence of data and to substantially remove the replica of the interference remaining within the observed sequence of data from the received observed sequence of data to provide the digital sequence of data.

13. The front end module of claim 12 , wherein the adjustment module comprises:
an adaptive filter module configured to adjust a phase and an amplitude of the estimate of the interference remaining within the observed sequence of data to substantially align the estimate of the interference remaining within the observed sequence of data with the interference remaining within the received observed sequence of data to provide the replica of the interference remaining within the observed sequence of data; and
a combination module configured to combine the replica of the interference remaining within the observed sequence of data and the received observed sequence of data to provide the digital sequence of data.

14. A method for cancelling interference imposed on a received communications signal, comprising:
providing, by a front end module, a primary communications signal based on the received communications signal and the interference;
providing, by the front end module, a secondary communications signal based on the interference, the secondary communications signal being different from the primary communications signal;
processing, by the front end module, the primary communications signal to provide an observed sequence of data;
processing, by the front end module, the secondary communications signal to estimate interference remaining within the observed sequence of data after processing of the primary communications signal to provide an estimate of the interference remaining within the observed sequence of data; and
removing, by the front end module, the estimate of the interference remaining within the observed sequence of data from the observed sequence of data to provide a digital sequence of data.

15. The method of claim 14 , wherein providing the primary communications signal comprises:
observing the received communications signal and electromagnetic radiation propagating throughout a communications environment, and
wherein providing the secondary communications signal comprises:
observing the electromagnetic radiation propagating throughout the communications environment.

16. The method of claim 14 , wherein providing the secondary communications signal comprises:
observing, by a receiving antenna, the interference.

17. The method of claim 14 , wherein processing the primary communications signal comprises:
processing, by a front end component configured and arranged to form a signal processing path, the primary communications signal to provide the observed sequence of data, and wherein processing the secondary communications signal comprises:
estimating, by a replica component configured and arranged to form a second signal processing path, the interference remaining within the observed sequence of data to provide the estimate of the interference remaining within the observed sequence of data, the second signal processing path being configured and arranged to be substantially similar to the signal processing path.

18. The method of claim 17 , wherein the front end component imposes distortion onto a signal of the signal processing path, and wherein processing the secondary communications signal comprises:
processing, by the front end module, the secondary communications signal to estimate distortion remaining within the observed sequence of data after processing of the primary communications signal to provide the estimate of the interference remaining within the observed sequence of data.

19. The method of claim 14 , wherein removing comprises

Assignees

• Gomez Ramon Alejandro
• Currivan Bruce J
• Brandolini Massimo
• Shin Young
• Gatta Francesco
• Zou Hanli
• Tan Loke Kun
• He Lin
• Kolze Thomas Joseph
• Dauphinee Leonard
• Joshi Robindra
• Chen Binning
• Avago Tech Int Sales Pte Lid

Inventors

• Gomez Ramon Alejandro
• Currivan Bruce J
• Brandolini Massimo
• Shin Young
• Gatta Francesco
• Zou Hanli
• Tan Loke Kun
• He Lin
• Kolze Thomas Joseph
• Dauphinee Leonard
• Joshi Robindra
• Chen Binning

Classifications

• H04J11/004 Primary

  using regenerative subtractive interference cancellation · CPC title

• H04L25/03006

  Arrangements for removing intersymbol interference · CPC title

• H04L27/2647

  Arrangements specific to the receiver only (equalisation H04L27/01) · CPC title