Analog beamforming devices

Patent metadata

Field	Value
Publication number	US-10432290-B2
Application number	US-201815889723-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Aug 7, 2015
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

An analog beamforming transmitter includes: a plurality of beamforming transmission circuits coupled in parallel between a signal input and an array of antenna ports, wherein the signal input is configured to receive an analog complex-valued communication signal having an in-phase and a quadrature component, wherein each antenna port of the array of antenna ports is configured to provide a dual-polarized antenna signal having a first polarization component and a second polarization component, wherein each beamforming transmission circuit is coupled between the signal input and a respective antenna port of the array of antenna ports, wherein each beamforming transmission circuit comprises a first coefficient input for receiving a first analog complex-valued beamforming coefficient a set of first analog complex-valued beamforming coefficients and a second coefficient input for receiving a second analog complex-valued beamforming coefficient of a set of second analog complex-valued beamforming coefficients.

First claim

What is claimed is:

1. An analog polarization adjustment transmitter, comprising:
a plurality of polarization adjustment transmission circuits coupled in parallel between a signal input and an array of antenna ports;
wherein the signal input is configured to receive an analog complex-valued communication signal having an in-phase component and a quadrature component;
wherein each antenna port of the array of antenna ports is configured to provide a dual-polarized antenna signal having a first polarization component and a second polarization component;
wherein each polarization adjustment transmission circuit is coupled between the signal input and a respective antenna port of the array of antenna ports;
wherein each polarization adjustment transmission circuit comprises a first coefficient input for receiving a first analog real-valued polarization adjustment coefficient of a set of first analog real-valued polarization adjustment coefficients and a second coefficient input for receiving a second analog real-valued polarization adjustment coefficient of a set of second analog real-valued polarization adjustment coefficients; and
wherein each polarization adjustment transmission circuit comprises:
a first analog multiplication circuit configured to multiply the analog complex-valued communication signal with a respective first analog real-valued polarization adjustment coefficient to provide a respective first polarization component of the dual-polarized antenna signal at a respective antenna port of the array of antenna ports;
a second analog multiplication circuit configured to multiply the analog complex-valued communication signal with a respective second analog real-valued polarization adjustment coefficient to provide a respective second polarization component of the dual-polarized antenna signal at a respective antenna port of the array of antenna ports;
a third coefficient input for receiving an analog complex-valued beamforming coefficient of a set of analog complex-valued beamforming coefficients; and
an analog complex-valued multiplication circuit coupled between the signal input and a respective one of the first and second analog multiplication circuits, wherein the analog complex-valued multiplication circuit is configured to multiply the analog complex-valued communication signal with the analog complex-valued beamforming coefficient to provide a beamformed analog complex-valued communication signal to the first and second analog multiplication circuits.

2. The analog polarization adjustment transmitter of claim 1 , further comprising:
a modulation circuit configured to modulate the analog complex-valued beamforming coefficient based on a Doppler shift corresponding to a beam formed by the analog complex-valued beamforming coefficient.

3. The analog polarization adjustment transmitter of claim 2 , wherein the modulation circuit is configured to modulate the analog complex-valued beamforming coefficient to a frequency that has a negated value of the Doppler shift corresponding to a concerned beam.

4. The analog polarization adjustment transmitter of claim 1 , wherein each polarization adjustment transmission circuit further comprises:
a mixer configured to mix the analog complex-valued communication signal with a Doppler shift compensation frequency to provide a Doppler shift compensated analog complex-valued communication signal.

5. The analog polarization adjustment transmitter of claim 4 , further comprising:
one of a multiplication circuitry or a delay line coupled between the mixer and the first and second analog multiplication circuits.

6. The analog polarization adjustment transmitter of claim 1 , wherein each polarization adjustment transmission circuit further comprises:
a delay line configured to delay the analog complex-valued communication signal with a time delay to provide a delay compensated analog complex-valued communication signal.

7. The analog polarization adjustment transmitter of claim 6 , further comprising:
a multiplication circuit, coupled between the delay line and the first and second analog multiplication circuits, configured to provide a beamforming operation or a Doppler shift compensation.

8. The analog polarization adjustment transmitter of claim 1 , wherein the first and second analog multiplication circuits comprise at least one Gilbert cell.

9. The analog polarization adjustment transmitter of claim 8 , wherein the at least one Gilbert cell comprises a real multiplication Gilbert cell that performs real valued multiplication operation.

10. The analog polarization adjustment transmitter of claim 1 , wherein the first coefficient input and the second coefficient input are coupled to a digital-to-analog converter or a shift-register circuit providing the first and second analog real-valued polarization adjustment coefficients.

11. The analog polarization adjustment transmitter of claim 1 , further comprising:
a signal combiner configured to combine the first polarization component of the dual-polarized antenna signal and a first polarization component of the dual-polarized antenna signal provided by a further analog polarization adjustment transmitter to provide a combined first polarization component of the dual-polarized antenna signal at the respective antenna port of the array of antenna ports.

12. An analog polarization adjustment receiver, comprising:
a plurality of polarization adjustment reception circuits connected in parallel between an array of antenna ports and a signal output;
wherein each antenna port of the array of antenna ports is configured to receive a dual-polarized antenna signal having a first polarization component and a second polarization component;
wherein the signal output is configured to provide an analog complex-valued communication signal having an in-phase component and a quadrature component;
wherein each polarization adjustment reception circuit is connected between a respective antenna port of the array of antenna ports and the signal output;
wherein each polarization adjustment reception circuit comprises a first coefficient input for receiving a first analog real-valued polarization adjustment coefficient of a set of first analog real-valued polarization adjustment coefficients and a second coefficient input for receiving a second analog real-valued polarization adjustment coefficient of a set of second analog real-valued polarization adjustment coefficients; and
wherein each polarization adjustment reception circuit comprises:
a first analog multiplication circuit configured to multiply a respective first polarization component of the dual polarized antenna signal at a respective antenna port of the array of antenna ports with a respective first analog real-valued polarization adjustment coefficient to provide a contribution to the analog complex-valued communication signal at the signal output;
a second analog multiplication circuit configured to multiply a respective second polarization component of the dual polarized antenna signal at a respective antenna port of the array of antenna ports with a respective second analog real-valued polarization adjustment coefficient to provide a contribution to the analog complex-valued communication signal at the signal output;
a third coefficient input for receiving an analog complex-valued beamforming coefficient of a set of analog complex-valued beamforming coefficients; and
an analog complex-valued multiplication circuit coupled between a respective one of the first and second analog multiplication circuits and the signal output, wherein the analog complex-valued multiplication circuit is configured to multiply an output signal

Assignees

• Huawei Tech Co Ltd

Inventors

• Luo Jian
• Thomae Reiner
• Dupleich Diego
• Röding Matthias
• Haefner Stephan
• Mueller Robert
• Schneider Christian
• Schulz Dominik

Classifications

• H04B7/086

  using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming · CPC title

• H04B7/01

  Reducing phase shift · CPC title

• H04B7/0671 Primary

  using different delays between antennas · CPC title

• H04B7/0691

  using subgroups of transmit antennas · CPC title

• H04B7/10

  Polarisation diversity; Directional diversity · CPC title