Distributed Adaptive Beamforming for Secure Wireless Links
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Solution Overview
Problem
Conventional distributed beamforming methods fail to secure wireless communications in dynamic, infrastructure-poor environments where adversaries can intercept signals without being detected, as they do not consider security issues and assume prior knowledge of adversary locations.
Innovation Solution
A system and methodology that divides agent devices into beamforming and nullforming groups to create a directional link to a client while disrupting adversaries by forming a null in signal strength, without prior knowledge of adversary locations, using phase control of RF signals to maximize signal strength at the client and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional distributed beamforming methods are used to maximize data rate at client device, then data throughput is improved, but security against eavesdropping deteriorates due to sidelobes radiating energy to unintended directions
Solution Approach 1:
The patent segments the beamforming network into multiple agent devices that independently transmit signals. Each agent device operates autonomously without requiring a priori knowledge of adversary locations, dividing the system into distributed units that collectively achieve secure beamforming through individual phase and power adjustments.
Solution Approach 2:
The patent applies local quality by having each agent device independently adjust its transmit phase and power based on local channel conditions to the client device. This localized adaptation creates constructive interference at the client while forming nulls in adversary directions, optimizing security and throughput at each transmission point without requiring global system knowledge.
2Object-affected harmful factors
If transmit power control algorithms are used to reduce peak sidelobe level, then eavesdropping vulnerability is reduced, but data throughput to client device deteriorates
Solution Approach 1:
The patent changes the parameters of transmission by having each agent device independently adjust both phase and power levels. This dual parameter optimization allows the system to reduce sidelobe radiation to unintended directions while simultaneously maintaining or enhancing data throughput to the client device, resolving the trade-off between security and productivity.
3Object-affected harmful factors
If power and phase optimization strategy is used with peak sidelobe level minimization, then eavesdropping vulnerability is reduced, but implementation complexity increases due to requiring a priori knowledge of adversary locations
Solution Approach 1:
The patent implements self-service by enabling each agent device to autonomously determine its transmit phase and power settings based on local observations and feedback. The system self-organizes into secure beamforming patterns without requiring external coordination or a priori knowledge of adversary locations, reducing implementation complexity while maintaining security benefits.
Solution Approach 2:
The patent employs feedback mechanisms where agent devices receive channel state information and performance metrics from the client device, then adjust their transmit phases and powers accordingly. This feedback loop enables the system to dynamically optimize sidelobe suppression and data throughput without requiring predetermined knowledge of adversary positions, simplifying implementation.
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 data throughput to the client while preventing adversarial interception, maintaining quality of service and reducing the vulnerability of wireless links to eavesdropping, even in environments with limited coordination and feedback.
Implementation Method 1
Each agent device independently transmits a signal to the client device. The signal transmitted by each agent device is based, at least in part, on a phase determined by the agent device. The phase of the signal transmitted by each agent device causes the signal from the agent device to interfere constructively with signals from other agent devices at a location of the client device.
Implementation Method 2
The signal transmitted by each agent device causes the signal from the agent device to interfere destructively with signals from other agent devices at a location of a potential adversary.
Data Source
AI summary
A system and method for distributed wireless communications comprising a first group of agents selected and configured to wirelessly transmit a communication signal to a client, wherein the first group of agents is capable of forming a radiation beam carrying the communication signal vectored substantially toward the client, and a second group of agents selected and configured to wirelessly broadcast communication signal interference, wherein the second group of agents is capable of forming a radiation beam not vectored substantially toward the client. Consequently, the first group of agents securely communicates with the client and the second group of agents suppresses the ability of an unauthorized, eavesdropping receiver from intercepting the communications signal.