HIGH SPEED MMF (MULTI-MODE FIBER) TRANSMISSIONS VIA ORTHOGONAL WAVEFRONTS

• US 20160006532A1
• Filed: 07/06/2015
• Published: 01/07/2016
• Est. Priority Date: 09/21/2011
• Status: Active Grant

• Current Assignee: Spatial Digital Systems Inc
• Original Assignee: Spatial Digital Systems Inc
• Inventors: Chang, Donald C.D.
• Granted Patent: US 10,090,958 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B64C 39/02 characterised by special use
• CPC Class Codes: G01S 13/933 of aircraft or spacecraft
• CPC Class Codes: G01S 7/006 using shared front-end circuitry, e.g. antennas G01S13/765, G01S13/825 take precedence
• CPC Class Codes: H04B 10/2581 Multimode transmission
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/18502 Airborne stations
• CPC Class Codes: H04B 7/18504 Aircraft used as relay or high altitude atmospheric platform
• CPC Class Codes: H04B 7/18515 Transmission equipment in satellites or space-based relays
• CPC Class Codes: H04B 7/18517 Transmission equipment in earth stations
• CPC Class Codes: H04B 7/18523 Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service arrangements specially adapted for satellite broadcast receiving H04H40/90; picture transmission via satellite H04N1/00103; television transmission via satellite H04N7/20
• CPC Class Codes: H04B 7/2041 Spot beam multiple access
• CPC Class Codes: H04J 14/00 Optical multiplex systems
• CPC Class Codes: H04J 14/005 Optical Code Multiplex
• CPC Class Codes: H04J 14/02 Wavelength-division multiplex systems
• CPC Class Codes: H04J 14/08 Time-division multiplex systems
• CPC Class Codes: H04L 25/03006 Arrangements for removing intersymbol interference
• CPC Class Codes: H04L 25/03891 Spatial equalizers MIMO diversity systems H04B7/0413

Abstract

A system is provided for high speed optical fiber data transmission by generating artificial wavefronts along multiple paths exhibiting spatial mutual orthogonality. Multiple independent signal streams are “structured” over a group of different propagation paths that are coherently organized by wavefront multiplexing and de-multiplexing techniques. Therefore, signal streams with enhanced throughput and reliability may be fully recovered at destinations via embedded diagnostic signals and optimization loops. Multiple optical channels are matched with multiple orthogonal wavefronts created by a signal pre-processor. A receiving end signal post-processor dynamically aligns propagation paths via diagnostic signals and orthogonality of the propagation wavefronts electronically. The multiple optical channels are coherently bonded into a single virtual channel, thereby increasing data bandwidth while reducing interference and unwanted multi-path effects. The wavefront multiplexing and de-multiplexing functions may be performed in a dedicated signal processor or may reside in a general-purpose microprocessor located in the user terminal.

Claims

1. An optical communications system comprising:

a first processor configured to generate a first output associated with a first combination of multiple inputs of said first processor and a second output associated with a second combination of said inputs of said first processor and arranged in parallel with said first output of said first processor; and

a first electrical-to-optical convertor arranged downstream of said first processor, wherein said first electrical-to-optical convertor is configured to convert electrical data associated with said first and second outputs of said first processor into first optical data.

2. The optical communications system of claim 1, wherein said first combination of said inputs of said first processor comprises a linear combination of said inputs of said first processor.

3. The optical communications system of claim 1 further comprising a de-multiplexer arranged upstream of said first processor, wherein said de-multiplexer is configured to divide a data stream into multiple outputs of said de-multiplexer coupled respectively to said inputs of said first processor.

4. The optical communications system of claim 1, wherein one of said inputs of said first processor comprises a pilot code.

5. The optical communications system of claim 1, wherein one of said inputs of said first processor is grounded.

6. The optical communications system of claim 1 further comprising a second processor arranged in parallel with said first processor, wherein said second processor is configured to generate a third output associated with a third combination of multiple inputs of said second processor and a fourth output associated with a fourth combination of said inputs of said second processor and arranged in parallel with said third output of said second processor, and a second electrical-to-optical convertor arranged downstream of said second processor and in parallel with said first electrical-to-optical convertor, wherein said second electrical-to-optical convertor is configured to convert electrical data associated with said third and fourth outputs of said second processor into second optical data, wherein said first and second optical data is configured to be transmitted via a common fiber.

7. The optical communications system of claim 6, wherein said first electrical-to-optical convertor is configured to generate multiple first mode groups for said first optical data and said second electrical-to-optical convertor is configured to generate multiple second mode groups for said second optical data.

8. The optical communications system of claim 7, wherein said first mode groups are the same as said second mode groups.

9. The optical communications system of claim 7, wherein said first mode groups are completely different from said second mode groups.

10. An optical communications system comprising:

an optical-to-electrical convertor configured to convert optical data to electrical data; and

a processor arranged downstream of said optical-to-electrical convertor, wherein said processor is configured to have a first input associated with a first combination of multiple outputs of said processor and a second input associated with a second combination of said outputs of said processor and arranged in parallel with said first input of said processor.

11. The optical communications system of claim 10, wherein said first combination of said outputs of said processor comprises a linear combination of said outputs of said processor.

12. The optical communications system of claim 10, wherein one of said outputs of said processor comprises a pilot code.

13. The optical communications system of claim 12 further comprising an optimization processor configured to optimize a weighting coefficient of said processor based on said pilot code.

14. The optical communications system of claim 10 further comprising a multiplexer arranged downstream of said processor, wherein said multiplexer is configured to combine said outputs of said processor into a data stream.

15. The optical communications system of claim 10, wherein said optical-to-electrical convertor is configured to separate multiple optical signals based on multiple mode groups of said optical signals.

16. The optical communications system of claim 10 further comprising a de-multiplexer arranged downstream of said processor, wherein said de-multiplexer is configured to de-multiplex one of said outputs of said processor into multiple outputs of said de-multiplexer.

17. The optical communications system of claim 16, wherein one of said outputs of said de-multiplexer comprises a pilot code.

18. An optical communications system comprising:

a de-multiplexer configured to convert a data stream into multiple outputs of said de-multiplexer;

a multiplexer arranged in parallel with said de-multiplexer, wherein said multiplexer is configured to multiplex multiple inputs of said multiplexer into an output of said multiplexer; and

a processor arranged downstream of said de-multiplexer and said multiplexer, wherein said processor has multiple inputs coupled respectively to said outputs of said de-multiplexer and said output of said multiplexer, wherein said processor is configured to generate a first output associated with a first combination of said inputs of said processor and a second output associated with a second combination of said inputs of said processor and arranged in parallel with said first output of said processor.

19. The optical communications system of claim 18, wherein said first combination of said inputs of said processor comprises a linear combination of said inputs of said processor.

20. The optical communications system of claim 18 further comprising an electrical-to-optical convertor arranged downstream of said processor, wherein said electrical-to-optical convertor is configured to convert electrical data associated with said first and second outputs of said processor into optical data.