Radio system for long-range high-speed wireless communication

Patent metadata

Field	Value
Publication number	US-10819037-B2
Application number	US-201916430326-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Feb 4, 2013
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

Devices and systems, and methods of using them, for point-to-point transmission/communication of high bandwidth signals. Radio devices and systems may include a pair of reflectors (e.g., parabolic reflectors) that are adjacent to each other and configured so that one of the reflectors is dedicated for sending/transmitting information, and the adjacent reflector is dedicated for receiving information. Both reflectors may be in a fixed configuration relative to each other so that they are aligned to send/receive in parallel. In many variations the two reflectors are formed of a single housing, so that the parallel alignment is fixed, and reflectors cannot lose alignment. The device/systems may be configured to allow switching between duplexing modes. These devices/systems may be configured as wide bandwidth zero intermediate frequency radios including alignment modules for automatic alignment of in-phase and quadrature components of transmitted signals.

First claim

What is claimed is:

1. A self-correcting wide-bandwidth zero intermediate frequency radio device, the device comprising:
a controller configured to emit transmission signals into a transmission path, the controller further configured to emit calibration tones;
the first transmission path connected to the controller and including an in-phase/quadrature (IQ) modulator comprising an IQ filter and an IQ up-converter; and
an IQ alignment module, wherein the IQ alignment module is connected to the first transmission path and comprises
a band-limited measuring receiver having a measuring frequency f m wherein the measuring receiver determines a carrier leakage signal based on the level of a calibration tone at f m , further wherein the measuring receiver determines a sideband rejection signal based on the level of a calibration tone at ±½(f m );
wherein the IQ alignment module provides the carrier leakage signal and the sideband rejection signal to the controller.

2. The device of claim 1 , wherein the controller comprises field programmable gate array (FPGA).

3. The device of claim 1 , wherein the measuring receiver comprises a pair of detectors.

4. The device of claim 1 , wherein the IQ alignment module comprises a pair of detectors each configured to receive orthogonal frequency division multiplexed (OFDM) transmission signals.

5. The device of claim 1 , wherein the IQ alignment module comprises a filter, amplifier and analog to digital converter (ADC).

6. The device of claim 1 , wherein the band-limited measuring receiver comprises a filter that sets the measuring frequency f m .

7. The device of claim 1 , wherein the measuring frequency is 10.7 MHz.

8. The device of claim 1 , wherein the controller is configured to emit orthogonal frequency division multiplexed calibration tones during an unused portion of a broadband communication signal frame.

9. The device of claim 1 , wherein the controller is configured to emit orthogonal frequency division multiplexed (OFDM) transmission signals.

10. The device of claim 1 , wherein the controller is configured to adjust device based on the sideband rejection signal and the carrier leakage signal.

11. A method of automatically correcting a wide-bandwidth zero intermediate frequency radio device, the method comprising:
emitting calibration tones from a controller configured to emit broadband communication signals to first transmission path including an in-phase/quadrature (IQ) modulator;
determining a carrier leakage signal based on a level of a calibration tone at a measuring frequency, f m , using an IQ alignment module having a band-limited measuring receiver with the measuring frequency;
determining a sideband rejection signal based on the level of a calibration tone at ±½(f m ); and
providing the carrier leakage signal and sideband rejection signal to the controller.

12. The method of claim 11 , wherein the determining steps comprise determining during an unused portion of a broadband communication signal frame.

13. The method of claim 11 , wherein emitting comprises emitting calibration tones that are orthogonal frequency division multiplexed (OFDM).

14. The method of claim 11 , wherein providing the carrier leakage signal and the sideband rejection signal comprise converting the carrier leakage signal to a digital signal and converting the sideband rejection signal to a digital signal.

15. The method of claim 11 , wherein the measuring frequency is 10.7 MHz.

16. The method of claim 11 , further comprising adjusting the wide-bandwidth zero intermediate frequency radio device based on the sideband rejection signal and the carrier leakage signal.

Assignees

• Ubiquiti Inc

Inventors

• Schulz Gary D
• Odlyzko Paul
• Sanford John R
• Fay Christopher
• Lee Jude
• Macenski Charles D
• Keniuk Richard J
• Lascari Lance D

Classifications

• H01Q3/26

  varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture ({H01Q3/12,} H01Q3/22, H01Q3/24 take precedence) · CPC title

• H01Q3/267

  Phased-array testing or checking devices · CPC title

• H01Q15/16 Primary

  curved in two dimensions [2D], e.g. paraboloidal · CPC title

• H01Q19/134

  Rear-feeds; Splash plate feeds · CPC title

• H01Q1/42

  Housings not intimately mechanically associated with radiating elements, e.g. radome · CPC title