Abstract: Disclosed are systems, methods, and computer programs for determining a range to a target. A system can include a first receiver configured for receiving a first signal from the target and a second receiver configured for receiving a second signal from the target, the second receiver time-synchronized with the first receiver. A programmable processor can determine a range to the target based on arrival times of the first signal at the first receiver and the second signal at the second receiver.

Abstract: Methods and systems are described herein for adaptive beamforming and interference mitigation using a time synchronized scalable cohered on-array processing system (“system”). The system may be a phased array implementing a software-defined radio using multi-input-multi-output antenna elements. The system includes multiple subarray elements which are configured into a tiered array of scalable subarrays that performs intermediary collation, coherence, noise reduction, and adaptive beamforming operations through processor nodes disposed between tiers. The intermediary collation operations process discrete portions of node excitation data to enable the phased array to generate an adaptive beam profile that directs high-directionality beams toward desired targets while adaptively partitioning interference sources between subarray elements.

Abstract: Methods and systems are described herein for adaptive beamforming and interference mitigation using a time synchronized scalable cohered on-array processing system (“system”). The system may be a phased array implementing a software-defined radio using multi-input-multi-output antenna elements. The system includes multiple subarray elements which are configured into a tiered array of scalable subarrays that performs intermediary collation, coherence, noise reduction, and adaptive beamforming operations through processor nodes disposed between tiers. The intermediary collation operations process discrete portions of node excitation data to enable the phased array to generate an adaptive beam profile that directs high-directionality beams toward desired targets while adaptively partitioning interference sources between subarray elements.

Abstract: Methods and systems are described herein for adaptive beamforming and interference mitigation using a time synchronized scalable cohered on-array processing system (“system”). The system may be a phased array implementing a software-defined radio using multi-input-multi-output antenna elements. The system includes multiple subarray elements which are configured into a tiered array of scalable subarrays that performs intermediary collation, coherence, noise reduction, and adaptive beamforming operations through processor nodes disposed between tiers. The intermediary collation operations process discrete portions of node excitation data to enable the phased array to generate an adaptive beam profile that directs high-directionality beams toward desired targets while adaptively partitioning interference sources between subarray elements.

Abstract: Methods and systems are described herein for time synchronization of a distributed sensor array system (“distributed system”). The distributed system includes multiple sensor nodes, which are time-synchronized using a combination of RF signal data and message-based time techniques across multiple communications mechanisms. Time synchronization is implemented both internally between a sensor node's components and over-the-air between different sensor nodes. The distributed system further employs multiple layers of standardized and custom synchronization protocols to build a scalable, potentially zero-hop, time transfer network. The time synchronization accuracies achieved by the time transfer network enable coherency in the distributed system.