IP Library › Granted Patent US 9,843,349
Granted Patent B2
US 9,843,349 · App. 15/253,090 · Granted Dec 12, 2017

System and method for frequency reuse for wireless point-to-point backhaul

Inventors: Ronen Shaked (Kfar-Saba, IL); Ilan Reingold (Givataim, IL); Eitan Tsur (Rishon Lezion, IL); Eran Ridel (Rosh Ha'aiyn, IL)
Assignee: Maxlinear Asia Singapore PTE LTD
H04B1/126H04B7/0854H04L1/0054
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Quick Facts
Patent No.
US 9,843,349
App. No.
15/253,090
Granted
Dec 12, 2017
Kind
B2
Abstract

A system and method for frequency reuse for wireless point-to-point backhaul. Frequency reuse is enabled through the cancellation of interfering signals generated by interference sources. In one embodiment, a conventional dish antenna is complemented with one or more additional auxiliary antennas (e.g., isotropic). The one or more additional auxiliary antennas enable cancellation of interfering signals whose direction of arrival (DOA) is off the dish antenna's bore-sight.

Claims (29)

1. A microwave receiver system, comprising:

a parabolic dish antenna that is configured to receive a first plurality of microwave signals from a desired source and generate a dish antenna output, the first plurality of microwave signals comprising interference signals from the desired source and a relayed signal from an intermediate node;

one or more auxiliary antennas that are configured to receive a second plurality of microwave signals and generate one or more auxiliary antenna outputs, the second plurality of microwave signals comprising a version of the interference signals and a version of the relayed signal; and

a signal processing module that is configured to receive the dish antenna output and one or more auxiliary antenna outputs, the processing module configured to use the one or more auxiliary antenna outputs to attenuate the interference signals in the dish antenna output.

2. The microwave receiver system of claim 1 , comprising an RF module that down-converts the dish antenna output.

3. The microwave receiver system of claim 1 , wherein the one or more auxiliary antennas are isotropic antennas.

4. The microwave receiver system of claim 1 , wherein the one or more auxiliary antennas is a single auxiliary antenna.

5. The microwave receiver system of claim 1 , wherein the one or more auxiliary antennas is a plurality of auxiliary antennas.

6. The microwave receiver system of claim 1 , wherein the signal processing module uses a Linear Minimum Mean Square Equalizer technique to remove the interference signals.

7. The microwave receiver system of claim 1 , wherein the signal processing module uses a Minimum Mean Square Equalizer technique to remove the interference signals.

8. The microwave receiver system of claim 1 , wherein the signal processing module uses a Maximum Likelihood technique to remove the interference signals.

9. A method, comprising:

generating a dish antenna output from a parabolic dish antenna that is configured to receive a first plurality of microwave signals from a desired source, the first plurality of microwave signals comprising interference signals from the desired source and a relayed signal from an intermediate node;

generating one or more auxiliary antenna outputs from one or more auxiliary antennas that are configured to receive a second plurality of microwave signals, the second plurality of microwave signals comprising a version of the interference signals and a version of the relayed signal; and

attenuating, using a signal processing module configured to receive the dish antenna output and the one or more auxiliary antenna outputs, the interference signals in the dish antenna output.

10. The method of claim 9 , comprising down-converting the dish antenna output using an RF module.

11. The method of claim 9 , wherein the one or more auxiliary antennas are isotropic antennas.

12. The method of claim 9 , wherein the one or more auxiliary antennas is a single auxiliary antenna.

13. The method of claim 9 , wherein the one or more auxiliary antennas is a plurality of auxiliary antennas.

14. The method of claim 9 , wherein the removing comprises removing using a Linear Minimum Mean Square Equalizer technique.

15. The method of claim 9 , wherein the removing comprises removing using a Minimum Mean Square Equalizer technique to remove the interference signals.

16. The method of claim 9 , wherein the removing comprises removing using a Maximum Likelihood technique to remove the interference signals.

17. A method, comprising:

receiving, by a signal processing module, an output of a parabolic dish antenna that is configured to receive a first plurality of microwave signals from a desired source, the first plurality of microwave signals comprising interference signals from the desired source and a relayed signal from an intermediate node;

receiving, by the signal processing module, an output of one or more auxiliary antennas; and

attenuating, via the signal processing module, the interference signals in the dish antenna output using the output of one or more auxiliary antennas.

18. The method of claim 17 , wherein the one or more auxiliary antennas are isotropic antennas.

19. The method of claim 17 , wherein the one or more auxiliary antennas is a single auxiliary antenna.

20. The method of claim 17 , wherein the one or more auxiliary antennas is a plurality of auxiliary antennas.

Continuity (3)
Continuation 14588358 · Dec 31, 2014
Provisional Application 61978376 · Apr 11, 2014
Related Publication 20170033819A1 · Feb 2, 2017