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US 10,547,414 B2Granted
Method and apparatus for broadcasting with spatially diverse signals
AssigneeGreenwich Technologies Associates
InventorCarl M. Elam
Life of this patent
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Abstract
A transmitter broadcasts a signal having a different code characteristic for each of several directions. A receiver receives the broadcast signal from one of the directions and generates an expected signal for that direction based on the code characteristic for that direction. The receiver detects the broadcast signal from the direction based on the expected signal for that direction.
Claims20
A method for broadcasting and receiving data comprising:
- broadcasting a broadcast signal, where the broadcast signal propagates in a plurality of directions and includes a different code characteristic for each of the plurality of directions,
- wherein the broadcast signal is phase adjusted to remove characteristic code variations within direct transmitted signal to a receiver,
- wherein broadcasting the broadcast signal includes simultaneously transmitting a plurality of modulated signals, and
- wherein each code characteristic for the plurality of directions is a function of at least two of the plurality of modulated signals;
- receiving the direct transmitted broadcast signal;
- filtering the transmitted broadcast signal to remove signals with code characteristics from a plurality of directions;
- and
- detecting the direct broadcast signal.
5 more elements
A method for receiving data comprising:
- receiving a broadcast signal, wherein the broadcast signal propagates in a plurality of directions and includes a different code characteristic for each of the plurality of directions,
- wherein the broadcast signal is phase adjusted to remove characteristic code variations within direct transmitted signal to a receiver,
- wherein a simultaneous transmission of a plurality of modulated signals that combine in space form the broadcast signal, and
- wherein the different code characteristics result from the combining in space of the plurality of transmitted modulated signals;
- receiving the direct transmitted broadcast signal;
- filtering the transmitted broadcast signal to remove signals with code characteristics from a plurality of directions;
- and
- detecting the direct broadcast signal.
5 more elements
A system for broadcasting and receiving data comprising:
- a transmitter to broadcast a broadcast signal that propagates in a plurality of directions and includes a different code characteristic for each of the plurality of directions,
- wherein the broadcast signal is phase adjusted to remove characteristic code variations within direct transmitted signal to a receiver, and
- wherein the transmitter includes a plurality of transmit elements to transmit a plurality of modulated signals, and
- wherein each code characteristic for the plurality of directions is a function of at least two of the plurality of modulated signals;
- a receiver to receive the direct transmitted broadcast signal;
- a receiver filter that filters the transmitted broadcast signal to remove signals with code characteristics from a plurality of directions;
- and
- a detector to detect the direct broadcast signal.
5 more elements
Dependencies are inferred from the claim text.