SYSTEMS AND METHODS FOR FOCUSING BEAMS WITH MODE DIVISION MULTIPLEXING

• US 20160359539A1
• Filed: 08/08/2016
• Published: 12/08/2016
• Est. Priority Date: 08/08/2014
• 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 D., ASHRAFI, NIMA
• Granted Patent: US 10,193,611 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 10/112 Line-of-sight transmission over an extended range
• CPC Class Codes: H04B 10/2507 for the reduction or elimination of distortion or dispersion
• CPC Class Codes: H04B 10/25752 Optical arrangements for wireless networks
• CPC Class Codes: H04B 10/2581 Multimode transmission
• CPC Class Codes: H04B 10/508 Pulse generation, e.g. generation of solitons
• CPC Class Codes: H04B 10/516 Details of coding or modulation
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0671 using different delays between antennas
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04J 14/04 Mode multiplex systems
• CPC Class Codes: H04J 14/07 Orbital angular momentum [OAM] multiplex systems
• CPC Class Codes: H04L 27/2017 in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation H04L27/201 takes precedence
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

A system and method for focusing an orthogonal function multiplexed beam receives an orthogonal function multiplexed signal from a data processing source. The orthogonal function multiplexed signal includes a plurality of data streams each having a unique orthogonal function applied thereto and multiplexed together within the orthogonal function multiplexed signal. The orthogonal function multiplexed signal passes through a pair of focusing lenses to focus the orthogonal function multiplexed signal on a predetermined focused point. A distance between the pair of focusing lenses is controlled to cause the orthogonal function multiplexed signal to focus at the predetermined focus point. The orthogonal function multiplexed signals are transmitted from a transmitter toward the focus point at a receiver aperture of a receiver as a transmission beam.

Claims

1. A method for focusing an orthogonal function multiplexed beam, comprising:

receiving an orthogonal function multiplexed signal from a data processing source, the orthogonal function multiplexed signal including a plurality of data streams each having a unique orthogonal function applied thereto and multiplexed together within the orthogonal function multiplexed signal;

passing the orthogonal function multiplexed signal through a pair of focusing lenses to focus the orthogonal function multiplexed signal to a predetermined focused point;

controlling a distance between the pair of focusing lenses to cause the orthogonal function multiplexed signal to focus at the predetermined focus point; and

transmitting the orthogonal function multiplexed signals from a transmitter toward the focus point at a receiver aperture of a receiver as a transmission beam.

2. The method of claim 1, wherein the distance between the pair of focusing lenses is equal to the transmission distance between the transmitter and the receiver.

3. The method of claim 1, wherein the step of controlling further comprises the step of controlling a variable distance between the pair of focusing lenses to cause the orthogonal function multiplexed signal to focus at the predetermined focus point.

4. The method of claim 1, wherein the orthogonal function comprises at least one of an OAM function, a Hermite-Gaussian function, a LaGuerre-Gaussian function, Jacobi functions, Gegenbauer functions, Legendre functions and Chebyshev functions.

5. The method of claim 1, wherein the transmission beam comprises an RF transmission beam.

6. The method of claim 1, wherein the transmission beam comprises an optical transmission beam.

7. The method of claim 1, wherein the step of transmitting further comprises transmitting the orthogonal function multiplexed signal toward a focus point located below the ground as the transmission beam.

8. The method of claim 1 further including:

receiving a plurality of data streams;

modulating each of the plurality of data streams;

applying the unique orthogonal function to each of the plurality of modulated data streams; and

multiplexing each of the unique orthogonal function applied data streams into the orthogonal function multiplexed signal.

9. A system for focusing an orthogonal function multiplexed beam, comprising:

orthogonal function signal processing circuitry for generating an orthogonal function multiplexed signal;

a transmitter for transmitting the orthogonal function multiplexed signal;

a pair of lenses within the transmitter for focusing the orthogonal function multiplex signal transmitted from the transmitter on a predetermined focus point, wherein a distance between the pair of lenses is controlled to focus the orthogonal function multiplexed signal onto the predetermined focus point; and

a transmitter control circuit for controlling transmission of the orthogonal function multiplexed signal from the transmitter and for controlling the distance between the pair of lenses to focus the orthogonal function multiplexed signal onto the predetermined focus point.

10. The system of claim 9, wherein the distance between the pair of focusing lenses is equal to the transmission distance between the transmitter and the receiver.

11. The system of claim 9, wherein transmitter controller circuit controls a variable distance between the pair of focusing lenses to cause the orthogonal function multiplexed signal to focus at the predetermined focus point.

12. The system of claim 9, wherein the orthogonal function comprises at least one of an OAM function, a Hermite-Gaussian function, a LaGuerre-Gaussian function, Jacobi functions, Gegenbauer functions, Legendre functions and Chebyshev functions.

13. The system of claim 9, wherein the transmission beam comprises an RF transmission beam.

14. The system of claim 9, wherein the transmission beam comprises an optical transmission beam.

15. The system of claim 9, wherein the transmitter transmits the orthogonal function multiplexed signal toward a focus point located below the ground as the transmission beam.

16. The system of claim 9, wherein the orthogonal function processing circuitry further receives a plurality of data streams, modulates each of the plurality of data streams, applies the unique orthogonal function to each of the plurality of modulated data streams and multiplexes each of the unique orthogonal function data streams into the OAM multiplexed signal.

17. A method for focusing an orthogonal function multiplexed beam, comprising:

receiving an orthogonal function multiplexed signal from a data processing source, the orthogonal function multiplexed signal including a plurality of data streams each having a unique orthogonal function applied thereto and multiplexed together within the orthogonal function multiplexed signal, wherein the orthogonal function comprises at least one of an OAM function, a Hermite-Gaussian function, a LaGuerre-Gaussian function, Jacobi functions, Gegenbauer functions, Legendre functions and Chebyshev functions;

passing the orthogonal function multiplexed signal through a pair of focusing lenses to focus the orthogonal function multiplexed signal to a predetermined focused point;

controlling a variable distance between the pair of focusing lenses to cause the orthogonal function multiplexed signal to focus at the predetermined focus point; and

transmitting the orthogonal function multiplexed signals from a transmitter toward the focus point at a receiver aperture of a receiver as a transmission beam.

18. The method of claim 17, wherein the distance between the pair of focusing lenses is equal to the transmission distance between the transmitter and the receiver.

19. The method of claim 17, wherein the transmission beam comprises an RF transmission beam.

20. The method of claim 17, wherein the transmission beam comprises an optical transmission beam.

21. The method of claim 17, wherein the step of transmitting further comprises transmitting the orthogonal function multiplexed signal toward a focus point located below the ground as the transmission beam.

22. The method of claim 17 further including:

receiving a plurality of data streams;

modulating each of the plurality of data streams;

applying the unique orthogonal function to each of the plurality of modulated data streams; and

multiplexing each of the unique orthogonal function applied data streams into the orthogonal function multiplexed signal.

23. A transmitter, comprising:

an interface for receiving an orthogonal function multiplexed signal;

transmission circuitry for transmitting the orthogonal function multiplexed signal;

a pair of lenses within the transmitter for focusing the received orthogonal function multiplex signal transmitted from the transmitter on a predetermined focus point, wherein a distance between the pair of lenses is controlled to focus the orthogonal function multiplexed signal onto the predetermined focus point; and

a transmitter control circuit for controlling transmission of the orthogonal function multiplexed signal from the transmission circuitry and for controlling the distance between the pair of lenses to focus the orthogonal function multiplexed signal onto the predetermined focus point.

24. The transmitter of claim 23, wherein the distance between the pair of focusing lenses is equal to the transmission distance between the transmitter and the receiver.

25. The transmitter of claim 23, wherein transmitter controller circuit controls a variable distance between the pair of focusing lenses to cause the orthogonal function multiplexed signal to focus at the predetermined focus point.

26. The transmitter of claim 23, wherein the orthogonal function comprises at least one of an OAM function, a Hermite-Gaussian function, a LaGuerre-Gaussian function, Jacobi functions, Gegenbauer functions, Legendre functions and Chebyshev functions.

27. The transmitter of claim 23, wherein the transmission beam comprises an RF transmission beam.

28. The transmitter of claim 23, wherein the transmission beam comprises an optical transmission beam.

29. The transmitter of claim 23, wherein the transmitter transmits the orthogonal function multiplexed signal toward a focus point located below the ground as the transmission beam.