Full duplex using OAM

Patent metadata

Field	Value
Publication number	US-11081796-B2
Application number	US-201916595148-A
Country	US
Kind code	B2
Filing date	Oct 7, 2019
Priority date	Dec 21, 2017
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

A system for providing full-duplex communications comprises a first transceiver for simultaneously transmitting first signals having a first orthogonal function applied thereto on a first channel and simultaneously receiving second signals having a second orthogonal function applied thereto at a same time. A second transceiver simultaneously receives the first signals having the first orthogonal function applied thereto on the first channel and simultaneously transmits the second signals having the second orthogonal function applied thereto at the same time. Application of the first orthogonal function to the first signals and application of the second orthogonal function to the second signals prevents interference between the first signals and the second signals.

First claim

What is claimed is:

1. A system for providing full-duplex communications, comprising:
a first transceiver at a first location including first transmitter circuitry and first receiver circuitry for simultaneously transmitting, from the first transmitter circuitry, first signals having a first orthogonal function applied thereto on a first channel on a first frequency band to a second location and simultaneously receiving, at the first receiver circuitry at the first location, second signals on a second channel on the first frequency band from the second location having a second orthogonal function applied thereto and the first signals on the first channel on the first frequency band from the first transmitter circuitry at a same time on the first frequency band, wherein the first receiver circuitry only processes received signals including the second orthogonal function;
a second transceiver at the second location including second transmitter circuitry and second receiver circuitry for simultaneously receiving, at the second receiver circuitry the first signals having the first orthogonal function applied thereto on the first channel on the first frequency band from the first location and the second signals on the second channel on the first frequency band and simultaneously transmitting, from the second transmitter circuitry, the second signals having the second orthogonal function applied thereto on the second channel on the first frequency band to the first location at the same time on the first frequency band, wherein the second receiver circuitry only processes received signals including the first orthogonal function; and
wherein application of the first orthogonal function to the first signals and application of the second orthogonal function to the second signals prevents interference between the first signals and the second signals that are being simultaneously transmitted and received on the same frequency band.

2. The system of claim 1 , wherein the first and the second orthogonal functions comprise orbital angular momentum functions.

3. The system of claim 1 , wherein the first orthogonal function and the second orthogonal function comprise at least one of a Hermite-Gaussian function, a Laguerre-Gaussian function, an Ince-Gaussian function, a Legendre function, a Bessel function, a Jacobi polynomial function, Gegenbauer polynomial function, Legendre polynomial function, Chebyshev polynomial function and a prolate spheroidal function.

4. The system of claim 1 , wherein each of the first channel and the second channel comprise separate Eigen channels.

5. The system of claim 1 , wherein each of the first transceiver and the second transceiver further include pilot signal generation circuitry for generating a pilot signal to measure channel characteristics for the first channel and the second channel.

6. The system of claim 1 , wherein the first transceiver further comprises:
first signal processing circuitry for receiving first input data and modulating the first input data onto a first carrier signal on the same frequency band for transmission and for demodulating a second carrier signal on the same frequency band into first output data;
first orthogonal function processing circuitry for applying the first orthogonal function of a plurality of orthogonal functions to the first carrier signal on the same frequency band and for removing the second orthogonal function of the plurality of orthogonal functions from the second carrier signal on the same frequency band; and
first full duplex processing circuitry for transmitting the first carrier signal on the same frequency band having the first orthogonal function applied thereto on the first channel at the same time the second carrier signal on the same frequency band including the second orthogonal function is being received on the second channel.

7. The system of claim 6 , wherein the second transceiver further comprises:
second signal processing circuitry for receiving second input data and modulating the second input data onto the second carrier signal on the same frequency band for transmission and for demodulating the first carrier signal on the same frequency band into second output data;
second orthogonal function processing circuitry for applying the second orthogonal function of the plurality of orthogonal functions to the second carrier signal on the same frequency band and for removing the first orthogonal function of the plurality of orthogonal functions from the first carrier signal on the same frequency band; and
second full duplex processing circuitry for transmitting the second carrier signal on the same frequency band having the second orthogonal function applied thereto on the second channel at the same time the first carrier signal on the same frequency band including the first orthogonal function is being received on the first channel.

8. The system of claim 1 , wherein the first and the second orthogonal functions further comprises at least one of orbital angular momentum functions and Laguerre-Gaussian functions implemented in a cylindrical coordinate system.

9. The system of claim 1 , wherein each of the first transmitter circuitry, the first receiver circuitry, the second transmitter circuitry and the second receiver circuitry further comprises a patch antenna array, the patch antenna array further comprising:
a plurality of layers;
a circular array of patch antennas included on each of the plurality of layers; and
wherein each of the circular arrays of patch antennas are concentric with an array of patch antennas in an adjacent layer.

10. A transceiver for transmitting and receiving full duplex communications, comprising:
signal processing circuitry for receiving input data and modulating the input data onto a first carrier signal on a frequency band for transmission by the transceiver from a first location to a second location and for demodulating a second carrier signal on the frequency band received by the transceiver at the first location into output data;
orthogonal function processing circuitry for applying a first orthogonal function of a plurality of orthogonal functions to the first carrier signal to be transmitted to the second location from the first location on the frequency band and for removing a second orthogonal function of the plurality of orthogonal functions from the second carrier signal received at the first location from the second location on the frequency band;
full duplex processing circuitry including transmitter circuitry for simultaneously transmitting the first carrier signal on the frequency band having the first orthogonal function applied thereto on a first channel from the first location to the second location and further including receiver circuitry for simultaneously receiving the second carrier signal on a second channel from the second location and receiving the first carrier signal on the first channel from the first location;
wherein the signal processing circuitry and the full duplex processing circuitry only processes received signals including the second orthogonal function; and
wherein the first channel having the first orthogonal function applied thereto and the second channel having the second orthogonal function applied thereto do not interfere with each other enabling full duplex transmissions from the transceiver on a same frequency band and a same time slots between the first location and the second location.

11. The transceiver of claim 10 , wherein the first and the second orthogonal functions comprise orbital angular momentum functions.

12. The transceiver of claim 10 , wherein the first orthogonal function and the second orthogonal functio

Assignees

• Nxgen Partners Ip Llc

Inventors

• Ashrafi Solyman

Classifications

• H04L5/06

  the signals being represented by different frequencies (combined with time-division multiplexing H04L5/26) · CPC title

• H04J11/0036

  at the receiver · CPC title

• H04L5/12

  the signals being represented by different phase modulations of a single carrier · CPC title

• H01Q21/065 Primary

  Patch antenna array · CPC title

• H01Q9/0428 Primary

  radiating a circular polarised wave · CPC title