Doppler Null Scanning for Passive Spatial Awareness Between Nodes
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Solution Overview
Problem
Conventional systems for coordinating between nodes, such as vehicles and smart expendable assets, are limited by interference, range, and lack of stealth in positioning and communication.
Innovation Solution
A system utilizing Doppler null steering to apply Doppler corrections for spatial awareness, enabling tracking, discovery, and network relay through time-synchronized scanning and Doppler null scanning, which allows for passive spatial awareness without explicit positional information exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional positioning and communication systems are used for coordination between nodes, then basic coordination functionality is achieved, but the system suffers from limited robustness to interference, limited range, and lack of stealth
Solution Approach 1:
The patent replaces conventional electronic communication systems with a radar-based electromagnetic wave system. The radar system transmits electromagnetic signals that reflect off targets, providing positioning and coordination information through physical wave propagation rather than electronic data transmission. This substitution provides inherent robustness to interference while maintaining coordination functionality.
Solution Approach 2:
The radar system performs multiple functions simultaneously: it provides positioning information, detects target presence, measures range and velocity, and enables coordination between nodes. This multi-functionality eliminates the need for separate communication channels, improving reliability while reducing overall system complexity.
2Object-affected harmful factors
If conventional communication methods are used for node coordination, then positional information can be exchanged, but the system lacks stealth and has limited range
Solution Approach 1:
The system replaces conventional radio communication with radar electromagnetic wave transmission. Radar waves propagate through the electromagnetic field with superior range and penetration capabilities, enabling long-distance coordination while maintaining stealth since the system passively detects reflected waves rather than actively transmitting data signals.
Solution Approach 2:
The radar system uses the target's own reflection of electromagnetic waves to obtain positioning information. The target object serves the system by naturally reflecting the transmitted waves back, eliminating the need for the target to have active transmitters or communication capabilities, thereby extending effective range while maintaining stealth.
3Loss of information
If active data communication is used for spatial awareness, then positional information is obtained, but communication efficiency decreases and robustness to interference is reduced
Solution Approach 1:
The patent replaces data communication protocols with direct electromagnetic wave measurement. The radar system directly measures range, velocity, and position through physical wave properties (time of flight, Doppler shift, angle of arrival) rather than exchanging encoded data packets. This eliminates communication overhead and protocol complexity while improving information accuracy and interference robustness.
Solution Approach 2:
The radar system continuously transmits electromagnetic waves and processes reflected signals to maintain constant spatial awareness. This continuous physical measurement provides real-time positional information without the start-stop nature of data packet communication, improving both information continuity and system efficiency by eliminating protocol overhead.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances communication robustness, range, and efficiency by providing spatial awareness and eliminating the need for active data communication, facilitating highly efficient mobile networking.
Implementation Method 1
the receiver or transmitter node may be time synchronized to apply Doppler corrections to signals, the Doppler corrections associated with the receiver or transmitter node's own motions relative to a common reference frame
Data Source
AI summary
A system is disclosed. The system may include a receiver or transmitter node. The receiver or transmitter node may include a communications interface with an antenna element. A controller may include one or more processors and have information of own node velocity and own node orientation relative to a common reference frame. The receiver or transmitter node may be time synchronized to apply Doppler corrections to signals, the Doppler corrections associated with the receiver or transmitter node's own motions relative to the common reference frame, the Doppler corrections applied using Doppler null steering along Null directions. The system may be configured to, via the Doppler null steering, at least one of: track an expendable asset of the system relative to a target; discover a rendezvous node; or identify at least one of a network relay node or a relay location for a network relay node.