Adaptive Multiresolution Modulation for Secure Transmission
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Solution Overview
Problem
Existing network transmission technologies face challenges in securing communications against eavesdropping, particularly in adapting to varying channel conditions, which can lead to data loss and inefficiencies due to symmetric modulation schemes.
Innovation Solution
Adaptive Multiresolution Modulation (AMM) allows for the adjustment of both the shape and size of asymmetric signal constellations, enabling secure transmission by scrambling data through mismatched decision regions, thereby enhancing security without increasing bandwidth or power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If symmetric modulation schemes are used for network transmission, then the transmission system is simple and reliable, but the security against eavesdropping is weak and data loss occurs in poor channel conditions
Solution Approach 1:
The patent applies asymmetry by using Adaptive Multiresolution Modulation (AMM) to create asymmetric signal constellations with varying shapes and sizes. The transmitter and legitimate receiver share secret asymmetric constellation parameters, while eavesdroppers receive symmetric constellations. This asymmetric-symmetric mismatch creates security vulnerability for eavesdroppers while maintaining reliable communication for authorized users through coordinated adaptation.
2Productivity
If adaptive multiresolution modulation is used to increase spectral efficiency, then data transmission capacity increases, but the complexity of the modulation system increases
Solution Approach 1:
The patent implements dynamics through adaptive multiresolution modulation that dynamically adjusts constellation shape and size based on channel conditions. The system transitions from static symmetric constellations to dynamic asymmetric constellations that can adapt their parameters in real-time, allowing the system to optimize spectral efficiency across varying channel conditions while managing complexity through coordinated transmitter-receiver adaptation.
3Object-affected harmful factors
If asymmetric signal constellations are used for security, then eavesdropping resistance improves, but the risk of demodulation errors increases without proper coordination
Solution Approach 1:
The patent employs feedback mechanisms where the transmitter and legitimate receiver share secret asymmetric constellation parameters through coordinated adaptation. The system uses feedback about channel conditions and constellation parameters to ensure that only authorized receivers with the correct asymmetric constellation information can accurately demodulate the signal, while eavesdroppers without the shared secret parameters experience high error rates.
4Productivity
If the constellation size is increased to improve spectral efficiency, then more data can be transmitted per symbol, but the vulnerability to channel errors increases
Solution Approach 1:
The patent applies local quality through adaptive multiresolution modulation that creates constellations with non-uniform symbol distributions. Different regions of the constellation space have different protection levels, with more robust symbols positioned in regions more susceptible to channel errors. This allows the system to optimize both spectral efficiency and error resistance by strategically distributing symbols based on their local vulnerability to channel disturbances.
Data Source
AI summary
A transmitter adjustment value for adjusting modulations at a transmitter may be determined. The transmitter may be configured to transmit in accordance with an asymmetric signal constellation, based on the determined transmitter adjustment value. A legitimate receiver may be provided with a receiver adjustment value corresponding to the determined transmitter adjustment value. At the transmitter, scrambled transmissions may be transmitted, based on transmitting using the determined transmitter adjustment value.