Wireless Modulation Security via Channel State Information

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Solution Overview

Problem

Wireless communication networks face vulnerabilities in data security due to improving computational capabilities of eavesdroppers, making existing encryption techniques less effective.

Innovation Solution

The method involves setting modulation and demodulation techniques based on the amplitude and phase information of wireless channels, using channel state information to select appropriate modulation methods and modify constellations, thereby enhancing data security by making it difficult for eavesdroppers to intercept and demodulate data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If encryption techniques relying on computational difficulties are used, then data security is provided, but data security becomes more vulnerable as computational capabilities of eavesdroppers improve

Engineering Contradiction:

Improvedata securityVSAvoidresistance to computational attacks

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the fundamental parameter of security from computational complexity to physical channel characteristics. By using amplitude and phase information of the wireless channel as security keys, the system transforms security reliance from mathematical difficulty to physical environment uniqueness, making it resistant to computational attacks while adapting to channel conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical/computational encryption system with a physics-based security system. Instead of relying on computational algorithms, the system uses physical channel properties (amplitude and phase) to establish secure communication, substituting mathematical security with physical law-based security

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If modulation methods are set based on channel amplitude and phase information, then data security is enhanced, but device complexity increases due to channel estimation and dynamic modulation selection

Engineering Contradiction:

Improvedata securityVSAvoidchannel estimation and modulation selection

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent makes the channel estimation process serve dual purposes: it provides necessary channel state information for reliable communication while simultaneously generating security keys for encryption. This multi-functionality reduces overall system complexity by eliminating separate security key generation mechanisms

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system uses its own channel characteristics to generate security keys without requiring external key distribution infrastructure. The channel estimation process itself produces the security parameters, making the system self-sufficient for security management

Inventive Principle:

Principle #25Self-service

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

This approach strengthens data security by ensuring that the wireless channel experienced by eavesdroppers differs from that between legitimate communication devices, making it harder for them to demodulate intercepted data, and also prevents eavesdroppers from being aware of constellation modifications.

Implementation Method 1

transmitting a pilot signal to a second wireless communication device via a wireless channel

Methodology Applied

Scientific EffectElectromagnetic wave propagation:

Implementation Method 2

receiving channel state information, estimated by and transmitted from the second wireless communication device in response to the pilot signal, the channel state information including amplitude information and phase information of the wireless channel

Methodology Applied

Scientific EffectChannel estimation:

Data Source

PatentUS10819463B2Wireless communication with modulation and demodulation set based on channel information

Publication Date: 2020.10.27 SAMSUNG ELECTRONICS CO LTD

AI summary

A wireless communication with modulation and demodulation set based on channel information is disclosed. An operating method of a first wireless communication device includes: transmitting a pilot signal via a wireless channel to a second wireless communication device; receiving channel state information, estimated by and transmitted from the second wireless communication device in response to the pilot signal, the channel state information including amplitude information and phase information of a wireless channel; setting a modulation method for data transmission based on the amplitude information and the phase information of the wireless channel; generating modulated data based on the modulation method; and transmitting the modulated data via the wireless channel.