Barrage Signal Precoder for Wireless Sidelobe Security
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Solution Overview
Problem
In LTE and 5G New Radio communication technologies, beamforming techniques used by base stations and wireless devices create sidelobes that can be intercepted by eavesdroppers, posing a security risk as they may contain the same information as the intended signal and have sufficient gain to allow eavesdroppers to receive the communication.
Innovation Solution
A base station generates a barrage signal precoder based on channel feedback from a wireless device, transmitting a barrage signal on a second beam that is different from the communication beam, potentially in the direction of the sidelobe, to jam the eavesdropper's reception, thereby enhancing the security of wireless communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If beamforming techniques are used to form highly directional transmissions, then communication directionality and signal strength are improved, but security is worsened due to sidelobes that can be intercepted by eavesdroppers
Solution Approach 1:
The base station transmits a barrage signal in advance or simultaneously with the communication signal in the sidelobe directions. This preliminary anti-action creates interference that prevents eavesdroppers from successfully intercepting the communication signal, directly addressing the security vulnerability created by beamforming sidelobes
Solution Approach 2:
The invention converts the harmful sidelobes into a beneficial security feature by transmitting barrage signals through the same beamforming structure. The sidelobes that originally enabled eavesdropping are now used to deliver protective interference signals to the same locations where eavesdroppers are likely positioned
2Object-affected harmful factors
If a barrage signal is transmitted to protect against eavesdropping, then security is improved, but system complexity increases due to additional signal processing and beam management
Solution Approach 1:
The same beamforming weights and channel feedback mechanisms used for communication beam management are reused for barrage signal transmission. The base station leverages existing beamforming infrastructure to generate directional barrage signals, avoiding the need for separate complex signal processing systems
Solution Approach 2:
The system uses its own channel feedback and beamforming capabilities to automatically generate and transmit barrage signals. The base station leverages existing channel state information to identify sidelobe directions and transmit protective signals without requiring external assistance or additional complex processing
Data Source
AI summary
In embodiments of systems and methods for protecting wireless communications a base station and the wireless device, a base station receive from a wireless device channel feedback from a wireless device regarding a communication beam between the base station and the wireless device, generate a barrage signal precoder based on the received channel feedback regarding the communication beam, and transmit a barrage signal using the barrage signal precoder on a second beam that is different from the communication beam.