Reconfigurable single and multi-sector cell site system

Patent metadata

Field	Value
Publication number	US-9698882-B2
Application number	US-201314439938-A
Country	US
Kind code	B2
Filing date	Nov 26, 2013
Priority date	Nov 28, 2012
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

A telecommunications system is provided that is controllably operable as a sectorized antenna system and as an omnidirectional antenna system without requiring hardware reconfiguration. The telecommunications system includes a phase correlation measurement unit that can be between a sectorized antenna sub-system and a remotely located RF source site. The phase correlation measurement unit can be coupled to the RF source site over at least one feed line. The phase correlation measurement unit can output signals for controlling a phase shifter at the RF source site for phase shifting downlink signals and for causing operation of the sectorized antenna sub-system as an omnidirectional antenna sub-system. In a sectorized operation mode, the phase correlation measurement unit and the phase shifter can be inactivated.

First claim

What is claimed is:

1. A telecommunications system comprising:
a phase correlation measurement unit configured to be positioned between a sectorized antenna sub-system and a remotely located radio frequency (RF) source site, the phase correlation measurement unit being coupleable to the RF source site over at least one feed line and configured for outputting signals for controlling a phase shifter at the RF source site for phase shifting downlink signals and for causing operation of the sectorized antenna sub-system as an omnidirectional antenna sub-system.

2. The telecommunications system of claim 1 , wherein the phase correlation measurement unit comprises:
de-couplers for de-coupling downlink signals from at least two feed lines;
a combiner for combining at least two de-coupled downlink signals to provide a combined signal; and
rectifier circuitry for producing a rectified voltage signal from the combined signal.

3. The telecommunications system of claim 2 , further comprising:
a phase shift controller at the RF source site for determining a measured voltage of the rectified voltage signal and controlling the phase shifter based on the measured voltage.

4. The telecommunications system of claim 3 , wherein the phase correlation measurement unit further comprises an on-coupler for coupling the rectified voltage signal to a feed line.

5. The telecommunications system of claim 3 , wherein the phase shift controller is configured for causing the phase shifter to shift a phase of a downlink signal until a maximum measured voltage is determined.

6. The telecommunications system of claim 2 , wherein the phase correlation measurement unit further comprises a 180° phase shifter positioned between a de-coupler and the combiner, wherein the telecommunications system further comprises a phase shift controller at the RF source site for determining a measured voltage from the rectified voltage signal and causing the phase shifter to shift a phase of a downlink signal until a minimum measured voltage is determined.

7. The telecommunications system of claim 2 , wherein the phase correlation measurement unit further comprises a filter positioned between the combiner and the rectifier circuitry for reducing or eliminating intermodulation products generated by the combined signal.

8. The telecommunications system of claim 1 , wherein the phase correlation measurement unit is configured for operating in an absence of coupling with an external voltage supply.

9. The telecommunications system of claim 1 , wherein the telecommunications system is switchable between a single sector mode and a multiple sector mode based on a control signal, the sectorized antenna subsystem being operable as the omnidirectional antenna sub-system in the single sector mode.

10. The telecommunications system of claim 1 , wherein the phase correlation measurement unit is a module formed by an RF board, a detection board, and a metal plane positioned between the RF board and the detection board.

11. A telecommunications system, comprising:
a phase shifter positionable at a radio frequency (RF) source site;
antennas positionable at a sectorized antenna sub-system site communicatively coupled to RF sources at the RF source site; and
a phase correlation measurement unit positionable at the sectorized antenna sub-system site, the phase correlation measurement unit being configured for outputting signals for controlling the phase shifter for phase shifting system signals and for causing operation of the sectorized antenna sub-system site as an omnidirectional antenna sub-system, wherein the telecommunications system is switchable between operating in an omnidirectional operation mode and a multiple sector operation mode in response to a control signal.

12. The telecommunications system of claim 11 , wherein the phase correlation measurement unit comprises:
de-couplers for de-coupling downlink signals from at least two feed lines;
a combiner for combining at least two de-coupled downlink signals to provide a combined signal; and
rectifier circuitry for producing a rectified signal from the combined signal, wherein the telecommunications system further comprises a phase shift controller positionable at the RF source site for determining a measured voltage from the rectified signal and controlling the phase shifter based on the measured voltage.

Assignees

• Andrew Wireless Systems Gmbh

Inventors

• Schmid Peter
• Eisenwinter Stefan
• Melester Matthew Thomas
• Gunzer Peter
• Williamson Michael

Classifications

• H01Q1/246

  specially adapted for base stations · CPC title

• H04W88/08

  Access point devices · CPC title

• H04B7/0491 Primary

  using two or more sectors, i.e. sector diversity · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04W88/10

  adapted for operation in multiple networks, e.g. multi-mode access points · CPC title