Communications Architectures via UAV

• US 20140241239A1
• Filed: 02/27/2013
• Published: 08/28/2014
• Est. Priority Date: 09/21/2012
• Status: Active Grant

• Current Assignee: Spatial Digital Systems Inc
• Original Assignee: Donald C.D. Chang
• Inventors: Chang, Donald C.D.
• Granted Patent: US 9,621,254 B2
• Time in Patent Office: Days
• US Class Current: 370/316
• CPC Class Codes: H04B 1/0483 Transmitters with multiple parallel paths
• CPC Class Codes: H04B 7/18504 Aircraft used as relay or high altitude atmospheric platform
• CPC Class Codes: H04B 7/18506 Communications with or from aircraft, i.e. aeronautical mobile service
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A communication system comprising a transmitter segment, a segment of propagation with a plurality of transmission channels, and a receiver segment; wherein the transmitter segment at a source location inputting a plurality of input signals to be transmitted; transforming the input signals to wavefront multiplexed signals (WFM signals) by performing a Wavefront-Multiplexing transform (WFM transform), modulating the WFM signals into WFM waveforms by modulators, before transmitting the WFM waveforms through the segment of propagation to the receiver segment; wherein the segment of propagation comprising a plurality of transmission channels among the WFM waveforms; wherein a first WFM waveform is transmitted over a first transmission channel; and a second WFM waveform is transmitted over a second transmission channel; wherein the receiver segment in a destination receiving the WFM waveforms from the transmission channels; performing demodulation on the received WFM waveforms converting received WFM waveforms to received WFM signals individually by demodulators before performing a Wavefront De-Multiplexing transform (WFDM transform) on received WFM signals to recover individual desired signals.

Claims

1. A communication system comprising a transmitter segment, a segment of propagation with a plurality of transmission channels, and a receiver segment;

wherein the transmitter segment at a source location inputting a plurality of input signals to be transmitted;

transforming the input signals to wavefront multiplexed signals (WFM signals) by performing a Wavefront-Multiplexing transform (WFM transform), modulating the WFM signals into WFM waveforms by modulators, before transmitting the WFM waveforms through the segment of propagation to the receiver segment;

wherein the segment of propagation comprising a plurality of transmission channels among the WFM waveforms;

wherein a first WFM waveform is transmitted over a first transmission channel; and

a second WFM waveform is transmitted over a second transmission channel;

wherein the receiver segment in a destination receiving the WFM waveforms from the transmission channels;

performing demodulation on the received WFM waveforms converting received WFM waveforms to received WFM signals individually by demodulators before performing a Wavefront De-Multiplexing transform (WFDM transform) on received WFM signals to recover individual desired signals.

2. A dynamic communication system as set forth in claim 1, wherein the input signals comprise digital signals, analog signals, mixed analog and digital signals, and a plurality of digital signal streams to be transmitted to a number of channels operating at a plurality of frequencies, wherein there exists at least as many channels as there exist received digital signal streams,

the system further comprising the operations of:

frequency-transforming the WFM waveforms to a transmission frequency band, prior to transmitting the WFM waveforms to a segment of propagation;

receiving and frequency-translating the received WFM waveforms from various channel frequencies at a user end in the receiver segment, to a base-band frequency resulting in received base-band frequency WFM waveforms,

3. A dynamic communication system as set forth in claim 1, wherein the input signals comprise digital signals, analog signals, mixed analog and digital signals, and a plurality of digital signal streams to be transmitted to a number of channels operating at a common frequency slot, wherein there exists at least as many channels as there exist received digital signal streams,

the system further comprising the operations of:

frequency-translating the WFM waveforms in the transmitter segment to a common frequency slot in transmission frequency band, prior to transmitting the WFM waveforms to many transponding platforms in the segment of propagation via various directions;

receiving, and frequency-translating WFM waveforms in the transponding platforms in the segment of propagation to a common frequency slot in transmission frequency band, and amplifying prior to re-transmitting the amplified frequency-translated WFM waveforms to the receiver segment from various transponding platforms;

receiving the transponded WFM waveforms at a user end from multiple transponding platforms in various directions and frequency-transforming the received WFM waveforms in the receiver segment, to a base-band frequency resulting in multi-channel base-band WFM waveforms before demodulating by the demodulators. Demodulations convert the received base-band WFM waveforms into base-band WFM signals, prior to a WFDM processor.

4. A dynamic communication system as set forth in claim 1, wherein the unique inverse of the WFM transform is equal to the WFM transform and the WFDM transform equals the WFM transform, and wherein the WFM transform is implemented at digital base band in digital format or by analog devices, wherein the analog devices are selected from a group consisting of a Butler Matrix, a Fourier transform pair, a Hadamard matrix, and a Hartley transform pair.

5. A dynamic communication system as set forth in claim 1, wherein at least one of the N inputs of the WF muxing transform is set to ground (zero value) signals and the corresponding ports of the WFDM are used for authentications, where N>

2.

6. A dynamic communication system as set forth in claim 1, wherein M of the N inputs of the WF muxing transform is set to ground (zero value) signals, where M>

0, and N>

2.

wherein the system transporting N−

M independent signal streams through N concurrent communication channels from the transmitter segment through the propagation segment to the receiver segment,

wherein the receiver segment reconstitutes the N−

M independent signal streams concurrently via received WFM waveforms from any N−

M out of N channels in the propagation segment.

7. The dynamic communication system as set forth in claim 6, the transmitter segment delivering only N1 independent signals stream to the receiver segment;

where N1<

N−

M

wherein the receiver segment reconstitutes the N1 independent signal streams concurrently via received WFM waveforms from any N1 out of N−

M channels in the propagation segment.

8. A wireless communication system comprising a transmitter segment, a segment of propagation with a plurality of transmission channels, and a receiver segment;

wherein the transmitter segment at a source location inputting a plurality of desired input signals to be transmitted;

transforming the desired input signals to wavefront multiplexed signals (WFM signals) by performing a Wavefront-Multiplexing transform (WFM transform), modulating the WFM signals into WFM waveforms by modulators, transmitting the WFM waveforms through the propagation segment connecting the transmitter segment and the receiver segment,

wherein the propagation segment comprising a plurality of transmission channels causing dynamic differential effects on amplitudes, phases, and time-delays among the WFM signals

wherein a first WFM waveform is transmitted over a first transmission channel; and

a second WFM waveform is transmitted over a second transmission channel;

wherein the first transmission channel comprising propagation through a first communication channel on an air platform;

wherein the receiver segment in a destination receiving the WFM waveforms from the transmission channels;

performing demodulations and converting the received WFM wave forms to received WFM signals, and performing a Wavefront De-Multiplexing transform (WFDM transform) on received WFM signals to recover individual desired signals.

9. A dynamic communication system as set forth in claim 8, wherein the input signals comprise digital signals, analog signals, mixed analog and digital signals, and a plurality of digital signal streams to be transmitted to a number of channels operating at a plurality of frequencies on the air platform, wherein there exists at least as many channels as there exist received digital signal streams,

the system further comprising the operations of:

frequency-transforming the WFM signals to a transmission frequency band, prior to modulating the WFM signals converting the WFM signals to WFM waveforms, Prior to transmitting the WFM waveform to the air platform in the propagation segment;

receiving transponded WFM waveforms and frequency-translating the received WFM waveforms, and demodulating the WFM waveforms into WFM signals at a user end in the receiver segment, to a base-band frequency resulting in base-band frequency WFM signals,

wherein a WFDM processor performing WFDM transformation on the base-band frequency WFM signals in order to reconstitute the desired data streams

10. A dynamic communication system as set forth in claim 8, wherein the input signals comprise digital signals, analog signals, mixed analog and digital signals, and a plurality of digital signal streams to be transmitted to a number of communications channels operating at a common frequency slot on various air platforms, wherein there exists at least as many communication channels as there exist received digital signal streams,

the system further comprising the operations of:

frequency-translating the WFM signals in the transmitter segment to a common frequency slot in transmission frequency band, prior to modulating the WFM signals to WFM waveforms and transmitting the WFM waveforms to the segment of propagation comprising of multiple air platforms operating at a common frequency in different slots in air by multibeam antennas;

receiving the transponded WFM waveforms by various air platforms at a user end from multiple directions and frequency-translating and demodulating the received WFM waveforms in the receiver segment, resulting in multi-channel base-band frequency WFM signals.

11. A dynamic communication system as set forth in claim 8, wherein the input signals comprise digital signals, analog signals, mixed analog and digital signals, and a plurality of digital signal streams to be transmitted to a number of communications channels operating at different frequencies and through various air platforms on selected locations, wherein there exists at least as many communications channels as there exist received digital signal streams,

the system further comprising the operations of:

frequency-translating the WFM signals in the transmitter segment to designated frequency slots of different transponders in transmission frequency band, prior to transmitting the modulated WFM signals (the WFM waveforms) by multibeam antennas to the segment of propagation comprising of multiple air platforms operating at various frequencies in different locations in air;

receiving the transponded WFM waveforms from various air platforms at a user end from multiple directions and frequency-transforming the received WFM waveforms in the receiver segment, to a base-band frequency resulting in multi-channel base-band WFM signals.

12. A dynamic communication system as set forth in claim 11, wherein the dynamic communication system comprising satellite systems selected from a group consisting of satellites with communication channels in C-band global coverage, satellites with communication channels in C-band shaped beam coverage, satellites with communications channels in Ku band global coverage, satellites with communication channels in Ku-band shaped beam coverage, satellites with communication channels in Ku-band spot beam coverage, satellites with communication channels in static coverage, satellites with communication channels in dynamic coverage, and satellites with communication channels in UHF-band global coverage.

13. A dynamic communication system as set forth in claim 11, wherein a WFM input port connected to a control signal has a corresponding WFDM controlled output port,

wherein the WFDM controlled output ports are used as authentication ports, and wherein a cost function is used to measure a difference between controlled input ports and their corresponding authentication ports, whereby the cost function is minimal when the difference become negligibly small.

14. A dynamic communication system as set forth in claim 11, wherein the unique inverse of the WFM transform is equal to the WFM transform and the WFDM transform equals the WFM transform, and wherein the WFM transform is implemented at digital base band in digital format or by analog devices, wherein the analog devices are selected from a group consisting of a Butler Matrix, a Fourier transform pair, Hadamard matrixes, and a Hartley transform pair.

15. A dynamic communication system comprising a transmitter segment, a segment of propagation with a plurality of multiplexed transmission channels, and a receiver segment;

wherein the transmitter segment at a source location inputting a plurality of desired input signals to be transmitted;

transforming the desired input signals to wavefront multiplexed signals (WFM signals) by performing a Wavefront-Multiplexing transform (WFM transform), modulating the WFM signals to WFM waveforms, transmitting the WFM waveforms through the propagation segment to the receiver segment,

wherein the segment of propagation comprising a plurality of transmission paths aggregated as existing multiplexed channels causing dynamic differential effects on amplitudes, phases, and time-delays among the WFM waveforms

wherein a first WFM waveform is transmitted over a first multiplexed transmission channel; and

a second WFM waveform is transmitted over a second multiplexed transmission channel;

wherein the receiver segment in a destination receiving the WFM waveforms from the multiplexed transmission channels;

de-modulating the received WFM waveforms converting the received WFM waveforms into the received WFM signals by demodulators, and performing a Wavefront De-Multiplexing transform (WFDM transform) on received WFM signals to recover individual desired signals.

16. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through a first frequency slot;

wherein the second multiplexed transmission channel comprising propagation through a second frequency slots.

17. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through a first time slot;

wherein the second multiplexed transmission channel comprising propagation through a second time slots.

18. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through signals with a first coded waveform;

wherein the second multiplexed transmission channel comprising propagation through signals with a second coded signals.

19. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through signals with a combination of a first coded waveform, in a first frequency slot, and in a first time slot;

wherein the second multiplexed transmission channel comprising propagation through signals with a combination of a second coded signals, in a second frequency slot, and in a second time slot.

20. A dynamic communication system as set forth in claim 15, wherein the dynamic communication system is a one-way communication system selected from a group consisting of a network hub to a user end, a user end to multiple users, a user end transmitting to a network hub, and a network hub transmitting to another network hub.

21. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through a first satellite transponders.

22. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through a first communication channel on an air platform;

23. A dynamic communication system as set forth in claim 15, wherein the first multiplexed transmission channel comprising propagation through a first terrestrial communication link.