System and method for communication using orbital angular momentum with multiple layer overlay modulation

• US 9,859,981 B2
• Filed: 06/26/2017
• Issued: 01/02/2018
• Est. Priority Date: 04/04/2014
• Status: Active Grant

• Current Assignee: Nxgen Partners Ip, LLC (NxGen Partners LLC)
• Original Assignee: Nxgen Partners Ip, LLC (NxGen Partners LLC)
• Inventors: Ashrafi, Solyman, Linquist, Roger, Ashrafi, Nima
• Primary Examiner(s): Okeke, Izunna
• Application Number:
  US15/632,533
• Publication Number:
  US 20170294965A1
• Time in Patent Office: 190 Days
• CPC Class Codes: H04B 10/11 Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
• CPC Class Codes: H04B 10/2575 Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
• CPC Class Codes: H04B 10/2581 Multimode transmission
• CPC Class Codes: H04B 10/50 Transmitters
• CPC Class Codes: H04B 10/5161 Combination of different modulation schemes
• CPC Class Codes: H04B 10/532 Polarisation modulation
• CPC Class Codes: H04B 10/541 Digital intensity or amplitude modulation
• CPC Class Codes: H04J 14/00 Optical multiplex systems
• CPC Class Codes: H04J 14/06 Polarisation multiplex systems
• CPC Class Codes: H04L 2025/0335 characterised by the type of transmission
• CPC Class Codes: H04L 2025/0342 QAM
• CPC Class Codes: H04L 25/03006 Arrangements for removing intersymbol interference
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/3405 Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
• CPC Class Codes: H04L 27/362 Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated H04L27/366 takes precedence
• CPC Class Codes: H04L 27/366 Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 9/0858 Details about key distillation or coding, e.g. reconciliation, error correction, privacy amplification, polarisation coding or phase coding
• CPC Class Codes: H04L 9/3093 involving Lattices or polynomial equations, e.g. NTRU scheme
• CPC Class Codes: H04W 12/041 Key generation or derivation
• CPC Class Codes: H04W 12/0431 : Key distribution or pre-distribution; Key agreement

Abstract

A system includes first signal processing circuitry to transmit a signal including a plurality of data streams over a link. The first signal processing circuitry generates a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first data layer with at least one second data signal of the plurality of data signals in a second data layer. Second circuitry processes the plurality of composite data streams to associate with each of the plurality of composite data streams a function to provide minimization of a time-bandwidth product of the plurality of composite data streams to enable transmission of each of the plurality of composite data streams on the link at a same time.

Claims

1. A system, comprising:

first signal processing circuitry for transmitting a signal including a plurality of input data streams over a link, the first signal processing circuitry further comprising;

first circuitry for processing each of the plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature-phase stream (Q) for each of the plurality of input data streams;

modulating each of the plurality of parallel pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs of data streams at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of parallel pairs of data streams;

generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first data layer with at least one second data signal of the plurality of data signals in a second data layer; and

second circuitry for processing the plurality of composite data streams to associate with each of the plurality of composite data streams a function to provide minimization of a time-bandwidth product of the plurality of composite data streams to enable transmission of each of the plurality of composite data streams on the link at a same time;

second signal processing circuitry for receiving the plurality of composite data streams on the link, the second signal processing circuitry further comprising;

a signal separator for separating each of the plurality of composite data streams having the function to provide minimization of the time-bandwidth product applied thereto by the second circuitry from each other;

third circuitry for removing the function to provide minimization of the time-bandwidth product of the plurality of composite data streams applied thereto by the second circuitry from each of the plurality of composite data streams; and

fourth circuitry for demodulating the plurality of composite data streams into the plurality of input data streams.

2. The system of claim 1, wherein the link further comprises at least one of a fiber optic link, a multi-mode fiber, a free space optics link and an RF link.

3. The system of claim 1, wherein the time bandwidth product takes a form of ½

(2n+1) where n is an integer ranging from 0 to infinity.

4. The system of claim 1, wherein the at least three mutually orthogonal functions comprises a plurality of time-limited and band-limited functions.

5. The communications system of claim 1, wherein the at least three mutually orthogonal functions comprises at least one of a plurality of modified Hermite polynomials, Jacobi polynomials, Gegenbauer polynomials, Legendre polynomials, Chebyshev polynomials and Laguerre functions.

6. The system of claim 1, wherein the at least three mutually orthogonal functions comprises a plurality of rectangular, cylindrical, and spherical functions.

7. A system, comprising:

first signal processing circuitry for transmitting a signal including a plurality of input data streams over a link, wherein the link further comprises at least one of a fiber optic link, a multi-mode fiber link, a free space optics link and an RF link, the first signal processing circuitry further comprising;

first circuitry for processing each of the plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature-phase stream (Q) for each of the plurality of input data streams,

modulating each of the plurality of parallel pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs of data streams at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of parallel pairs of data streams, and

generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first data layer with at least one second data signal of the plurality of data signals in a second data layer;

second circuitry for processing the plurality of composite data streams to associate with each of the plurality of composite data streams a function to provide minimization of a time-bandwidth product of the plurality of composite data streams to enable transmission of each of the plurality of composite data streams on the link at a same time;

second signal processing circuitry for receiving the plurality of composite data streams over the link, the second signal processing circuitry further comprising;

a signal separator for separating each of the plurality of composite data streams having the function to provide minimization of the time-bandwidth product applied thereto by the second circuitry from each other;

third circuitry for removing the function to provide minimization of the time-bandwidth product of the plurality of composite data streams applied thereto by the second circuitry from each of the plurality of composite data streams; and

fourth circuitry for demodulating the plurality of composite data streams into the plurality of input data streams.

8. The system of claim 7, wherein the time bandwidth product takes a form of ½

(2n+1) where n is an integer ranging from 0 to infinity.

9. The system of claim 7, wherein the at least three mutually orthogonal functions comprises at least one of a plurality of time-limited and band-limited functions, rectangular functions, cylindrical functions and spherical functions.

10. The system of claim 7, wherein the at least three mutually orthogonal functions comprises at least one of a plurality of modified Hermite polynomials, Jacobi polynomials, Gegenbauer polynomials, Legendre polynomials, Chebyshev polynomials and Laguerre functions.

11. A method for providing a plurality of input data streams from first signal processing circuitry to second signal processing circuitry over a link, comprising:

receiving the plurality of input data streams;

processing each of the plurality of input data streams to generate a plurality of parallel pairs of data streams including an in-phase stream (I) and a quadrature-phase stream (Q) for each of the plurality of input data streams;

modulating each of the plurality of parallel pairs of data streams with a selected one of at least three mutually orthogonal functions and each of the plurality of parallel pairs at a different signal width, respectively, to generate a plurality of data signals, each associated with one of the plurality of parallel pairs of data streams, and

generating a plurality of composite data streams by overlaying at least one first data signal of the plurality of data signals in a first data layer with at least one second data signal of the plurality of data signals in a second data layer;

applying a function to provide minimization of a time-bandwidth product of the plurality of composite data streams to enable transmission of each of the plurality of composite data streams on the link at a same time;

placing the plurality of composite data streams on the link, each of the plurality of composite data streams having the function associated therewith to enable each of the plurality of composite data streams on the link at a same time;

receiving the plurality of composite data streams on the link;

separating each of the plurality of composite data streams having the function to provide minimization of the time-bandwidth product applied thereto from each other;

demodulating the function to provide minimization of the time-bandwidth product from each of the plurality of composite data streams; and

demodulating the plurality of composite data streams into the plurality of input data streams.

12. The method of claim 11, wherein the link further comprises at least one of a fiber optic link, a multi-mode fiber, a free space optics link and an RF link.

13. The method of claim 11, wherein the time bandwidth product takes a form of ½

(2n+1) where n is an integer ranging from 0 to infinity.

14. The method of claim 11, wherein the at least three mutually orthogonal functions comprises at least one of a plurality of time-limited and band-limited functions, rectangular functions, cylindrical functions and spherical functions.

15. The method of claim 11, wherein the at least three mutually orthogonal functions comprises a plurality of at least one of modified Hermite polynomials, Jacobi polynomials, Gegenbauer polynomials, Legendre polynomials, Chebyshev polynomials and Laguerre functions.