Space-time coding with signal separation
A method for transmitting a message, including an array of signal radiating elements for broadcasting signals that are unique one from another. One each of the unique signals is associated with one each of the radiating elements. One each of a set of transmitters is in electronic communication with one each of the radiating elements, and provides the associated unique signal to each of the radiating elements. A signal generating device receives the message from a message source and transforms the message into the unique signals. The unique signals, when broadcast, spatially interfere one with another such that the message is intelligibly receivable at only one location that is predetermined by the signal generating device, and is garbled at all other locations.
1. A method for transmitting a message, the method comprising:
entering a message into a signal generating device,
selecting a predetermined location to send the message, and entering the location into the signal generating device,
inputting a configuration of an array from which to send the message into the signal generating device,
with the signal generating device, calculating an angle and a distance between the predetermined location and the signal generating device,
with the signal generating device, calculating signal interference at the predetermined location between signals broadcast from the array,
calculating signal precursors that are unique one from another, that when broadcast from the array, interfere one with another as calculated, such that signal precursors produce the message in an intelligible form only at the predetermined location, and are garbled at all other locations,
sending the signal precursors to signal transmitters, and
broadcasting the signal precursors with radiating elements within the array.
2. The method of claim 1 , wherein the radiating elements are antennas.
3. The method of claim 1 , wherein the array is a MIMO array.
4. The method of claim 1 , wherein the array is a sparse MIMO array.
5. The method of claim 1 , wherein the array is a statistical MIMO array.
6. The method of claim 1 , wherein the message that is intelligibly receivable at the predetermined location is encrypted.
7. The method of claim 1 , wherein the message that is intelligibly receivable at the predetermined location is compressed.
8. The method of claim 1 , wherein the message that is garbled at all other locations is receivable as intentional misinformation.
9. A non-transitory computer-readable-medium having software instructions stored thereon, the software for instructing a signal generating device to process a message, comprising:
entering the message into the signal generating device,
selecting a predetermined location to send the message, and entering the location into the signal generating device,
inputting a configuration of an array from which to send the message into the signal generating device,
with the signal generating device, calculating an angle and a distance between the predetermined location and the signal generating device,
with the signal generating device, calculating signal interference at the predetermined location between signals broadcast from the array,
calculating signal precursors that are unique one from another, that when broadcast from the array, interfere one with another as calculated, such that signal precursors produce the message in an intelligible form only at the predetermined location, and are garbled at all other locations,
sending the signal precursors to signal transmitters, and
broadcasting the signal precursors with radiating elements within the array.