Bandpass Signal Mapping for Low-Overhead Physical Layer Security

Solution Overview

Problem

Wireless communications are vulnerable to unauthorized interception due to the sharing nature of wireless communication channels, and existing security techniques based on encryption schemes from higher layers lead to spectral and energy inefficiencies, high data throughput, and increased latency.

Innovation Solution

Implement a system that decomposes digital samples of time-variant envelope signals into mapping components using coded amplification, applying secure mapping rules to generate bandpass components with varying mapping codes and coefficients, ensuring physical layer security without additional complexity or overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If encryption schemes from higher layers are used for wireless security, then security against unauthorized interception is improved, but spectral efficiency deteriorates and energy consumption increases

Engineering Contradiction:

ImprovesecurityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent segments the security function into two parts: (1) physical layer obfuscation through randomized mapping of constellation points that consumes minimal energy, and (2) traditional encryption for cryptographic security. This segmentation allows the system to achieve both security and energy efficiency by handling only the obfuscation function at the physical layer rather than relying entirely on higher-layer encryption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by pre-randomizing the mapping between constellation points and signal representations before transmission. This preliminary randomization creates an obfuscation layer that protects against casual interception and simplifies the overall security architecture, reducing the computational burden on higher-layer encryption schemes and thereby lowering energy consumption.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If encryption schemes from higher layers are used for wireless security, then security against unauthorized interception is improved, but spectral efficiency deteriorates

Engineering Contradiction:

ImprovesecurityVSAvoidspectral efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the security function into two parts: (1) physical layer obfuscation through randomized mapping of constellation points that maintains spectral efficiency, and (2) traditional encryption for cryptographic security. This segmentation allows the system to achieve both security and spectral efficiency by handling only the obfuscation function at the physical layer rather than relying entirely on higher-layer encryption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by pre-randomizing the mapping between constellation points and signal representations before transmission. This preliminary randomization creates an obfuscation layer that protects against casual interception and simplifies the overall security architecture, reducing the computational burden on higher-layer encryption schemes and thereby improving spectral efficiency.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If encryption schemes from higher layers are used for wireless security, then security against unauthorized interception is improved, but data latency increases

Engineering Contradiction:

ImprovesecurityVSAvoiddata latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent segments the security function into two parts: (1) physical layer obfuscation through randomized mapping of constellation points that processes data in real-time with minimal latency, and (2) traditional encryption for cryptographic security. This segmentation allows the system to achieve both security and low latency by handling the obfuscation function at the physical layer where processing is faster and more parallelizable than higher-layer encryption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by pre-randomizing the mapping between constellation points and signal representations before transmission. This preliminary randomization creates an obfuscation layer that protects against casual interception and simplifies the overall security architecture, reducing the computational burden on higher-layer encryption schemes and thereby decreasing data latency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12511410B1Physical layer security

Publication Date: 2025.12.30 QDACOMM LLC

AI summary

Systems and methods of performing physical layer security are presented. In one exemplary embodiment, an electronic device includes a set of amplifier circuitry operable to output a set of output signals that collectively represents an amplified sample of an input signal having information. Further, the set of output signals corresponds to a set of bandpass components that is secured by a certain physical layer security scheme and is associated with a quantized polar representation of the input signal sample.