Multi-band polarization rotation for interference mitigation

Patent metadata

Field	Value
Publication number	US-12562502-B2
Application number	US-202318357319-A
Country	US
Kind code	B2
Filing date	Jul 24, 2023
Priority date	May 26, 2022
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

Aspects of the subject disclosure may include, for example, obtaining data regarding interference originating from one or more interference sources, and electronically rotating polarizations of signals relating to crossed-dipole radiating elements of an antenna system, the antenna system operating in multiple frequency bands, the electronically rotating being performed for a select number of frequency bands of the multiple frequency bands and facilitating mitigation of the interference. Other embodiments are disclosed.

First claim

What is claimed is:

1 . A method, comprising:
obtaining data regarding interference originating from one or more interference sources, wherein the interference has a polarization orientation; and applying an algorithm for rotating polarizations of first radio frequency (RF) signals and second RF signals relating to crossed-dipole radiating elements of an antenna system, the rotating being performed to facilitate mitigation of the interference by reducing interference imposed on the first RF signals by the interference or increasing interference imposed on the second RF signals by the interference.

2 . The method of claim 1 , wherein the applying the algorithm for rotating is performed for transmit (Tx) signals, receive (Rx) signals, or both.

3 . The method of claim 1 , wherein the applying the algorithm for rotating is performed in a same or a different manner for transmit (Tx) signals and receive (Rx) signals.

4 . The method of claim 1 , wherein the applying the algorithm for rotating polarizations of the first RF signals and the second RF signals is performed by way of digital signal processing of digital data associated with the first RF signals and the second RF signals.

5 . The method of claim 1 , wherein the applying the algorithm for rotating polarizations of the first RF signals and the second RF signals is performed by way of analog signal processing of analog signals associated with the first RF signals and the second RF signals.

6 . The method of claim 1 , wherein the applying the algorithm for rotating is performed in a remote radio unit (RRU), a remote radio head (RRH), a Common Public Radio Interface (CPRI) device, a baseband unit, or another device in a radio access network (RAN), and wherein the interference comprises passive intermodulation (PIM).

7 . An apparatus, comprising:
a processing system associated with an antenna system and configured to perform operations, comprising: receiving data regarding interference, wherein the interference has a polarization orientation; and applying an algorithm for manipulating first radio frequency (RF) signals and second RF signals to rotate polarizations thereof to facilitate mitigation or avoidance of the interference by reducing interference imposed on the first RF signals by the interference or increasing interference imposed on the second RF signals by the interference, the first RF signals and the second RF signals relating to crossed-dipole radiating elements of the antenna system.

8 . The apparatus of claim 7 , wherein the applying the algorithm for manipulating is performed for transmit (Tx) signals, receive (Rx) signals, or both, and wherein the apparatus is implemented in a remote radio unit (RRU), a remote radio head (RRH), a Common Public Radio Interface (CPRI) device, or a baseband unit.

9 . The apparatus of claim 7 , wherein the applying the algorithm is performed by way of digital signal processing of digital data associated with the first RF signals and the second RF signals.

10 . The apparatus of claim 7 , wherein the applying the algorithm is performed by way of analog signal processing of analog signals associated with the first RF signals and the second RF signals.

11 . The apparatus of claim 7 , wherein the applying the algorithm for manipulating is performed without requiring any physical rotation of the crossed-dipole radiating elements or a housing of the antenna system.

12 . The apparatus of claim 7 , wherein the first RF signals and the second RF signals include orthogonal RF signals, and wherein the applying the algorithm for manipulating involves projection of the orthogonal RF signals in a different set of axes.

13 . The apparatus of claim 7 , wherein the interference comprises passive intermodulation (PIM).

14 . A device, comprising:
a processing system configured to: detect interference originating from one or more interference sources, wherein the interference has a polarization orientation; and apply an algorithm to perform virtual rotation of crossed-dipole radiating elements of an antenna system by rotating polarizations of first radio frequency (RF) signals and second RF signals relating to the crossed-dipole radiating elements, the rotating the polarizations being performed to facilitate mitigation of the interference by reducing interference imposed on the first RF signals by the interference or increasing interference imposed on the second RF signals by the interference.

15 . The device of claim 14 , wherein the first RF signals and the second RF signals include orthogonal RF signals, and wherein the rotating the polarizations involves projection of the orthogonal RF signals in a different set of axes.

16 . The device of claim 14 , wherein the rotating the polarizations is performed for transmit (Tx) signals, receive (Rx) signals, or both, and where the device is implemented in a remote radio unit (RRU), a remote radio head (RRH), or a baseband unit.

17 . The device of claim 14 , wherein the rotating the polarizations is performed without requiring any movement of the crossed-dipole radiating elements or a housing of the antenna system.

18 . The device of claim 14 , wherein applying the algorithm is performed by way of digital signal processing of digital data associated with the first RF signals and the second RF signals.

19 . The device of claim 14 , wherein applying the algorithm is performed by way of analog signal processing of analog signals associated with the first RF signals and the second RF signals.

20 . The device of claim 14 , wherein the interference comprises passive intermodulation (PIM).

Assignees

• Isco Int Llc

Inventors

• Abdelmonem Amr
• Tacconi Pablo

Classifications

• H01Q9/16

  with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence) · CPC title

• H01Q1/246 Primary

  specially adapted for base stations · CPC title

• H01Q21/24

  Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction {(circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001)} · CPC title

• H01Q21/26

  Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre · CPC title

• H01Q21/245 Primary

  provided with means for varying the polarisation  (polarising devices H01Q15/24; tracking by comparing linear polarisation compounds G01S3/146; reducing depolarisation effects H04B7/00; polarisation diversity H04B7/10) · CPC title