Stratospheric-based communication system having interference cancellation
View Patent ↗A system has a stratospheric platform with a payload controller and a phased array antenna having a plurality of elements. A gateway station communicates with the stratospheric platform. The gateway station scales the plurality of elements to form a reconfigurable plurality of beams. The gateway station communicates a control signal to the stratospheric platform to communicate a scaling of the elements. The stratospheric platform configures the elements of the phased array antenna according to the scaling using adaptive interference rejections.
1. A communications system comprising:
a stratospheric platform having a payload controller and a phased array antenna having a plurality of elements for generating a first beam and a second beam; and
a gateway station in communication with said stratospheric platform, said gateway station receiving a first signal having the first beam having interference from the second beam therein and receiving a second signal having the second beam having interference from the first beam therein,
said gateway station comprising a first subtracting block for subtracting said second signal from said first signal to obtain the first beam; and
said gateway station comprising a second subtracting block for subtracting said first signal from said second signal to obtain the second beam.
2. A communications system as recited in claim 1 , wherein said gateway station weights said second signal with a first weight prior to subtracting said second signal from said first signal.
3. A communications system as recited in claim 1 , wherein said gateway station weights said first signal with a second weight prior to subtracting said second signal from said first signal.
4. A communications system as recited in claim 1 , wherein said first weight is a function of user position files.
5. A communications system as recited in claim 1 , wherein the payload controller comprises a demultiplexer for receiving control signals.
6. A communications system as recited in claim 5 , wherein the demultiplexer generates a plurality of element control signals.
7. A communications system as recited in claim 6 , wherein the element control signals are coupled to an RF feed, and the RF feed is coupled to said plurality of elements of said phased array antenna.
8. A communications system as recited in claim 1 , wherein the gateway station comprises a beam generator for generating beam signals.
9. A communications system as recited in claim 1 , wherein said gateway station further comprises a multiplexer/demultiplexer.
10. A communications system as recited in claim 9 , wherein said multiplexer/demultiplexer comprises a code division multiplexer/demultiplexer.
11. A communications system as recited in claim 1 , wherein said gateway station is coupled to a terrestrial network.
12. A system as recited in claim 11 , wherein said terrestrial network comprises an Internet.
13. A system as recited in claim 11 , wherein the terrestrial network comprises a public service telephone network.
14. A communications system comprising:
a stratospheric platform having a payload controller and an antenna having a plurality of elements for generating a first beam and a second beam; and
a gateway station in communication with said stratospheric platform, said gateway station receiving a first signal having the first beam having interference from the second beam therein and receiving a second signal having the second beam having interference from the first beam therein,
said gateway station weighing said second signal with a first weight to form a weighted second signal, and thereafter, said gateway station comprising a first subtracting block subtracting said second weighted signal from said first signal to obtain the first beam, wherein said first weight is a function of user position files; and
said gateway station comprising a second subtracting block for subtracting said first signal from said second signal to obtain the second beam.
15. A communications system comprising:
a stratospheric platform having a payload controller and an antenna having a plurality of elements for generating a first beam and a second beam; and
a gateway station in communication with said stratospheric platform, said gateway station receiving a first signal having the first beam having interference from the second beam therein and receiving a second signal having the second beam having interference from the first beam therein,
said gateway station weighing said second signal with a first weight to form a weighted second signal, and thereafter, said gateway station comprising a first subtracting block subtracting said second weighted signal from said first signal to obtain the first beam; and
said gateway station weighing said first signal with a second weight to from a first weighted signal, said gateway station comprising a second subtracting block for subtracting said first weighted signal from said second signal to obtain the second beam, said first weight and the second weight being a function of user position files.