Bounded Arbitrary Frequency Modulation for Secure Signal Transmission
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Solution Overview
Problem
Existing signal transmission methods require additional equipment and the exchange of security information, such as encryption keys or codebooks, between transmitter and receiver, which can be costly and complicated, and do not provide secure transmission without this exchange.
Innovation Solution
A system using bounded arbitrary frequency modulation, where a transmitter modulates signals with an arbitrary waveform generated by mathematical functions with parameters selected from a bounded range, allowing the receiver to decode using the same functions without prior knowledge of the exact parameters, and iteratively adjust parameters to achieve successful decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping, pulse shaping, direct sequence spread spectrum, or encryption is used to secure signal transmission, then signal security is improved, but device complexity and cost increase due to additional equipment requirements
Solution Approach 1:
The patent changes the parameters of the transmitted signal by modulating it with arbitrary waveforms characterized by multiple parameters (amplitude, frequency, phase, duration). The receiver iteratively adjusts these parameters to decode the signal, eliminating the need for complex additional equipment while maintaining security.
Solution Approach 2:
The system uses the signal itself to carry security information through its waveform parameters. The arbitrary waveform characteristics embed the security mechanism directly in the signal, allowing the signal to secure itself without requiring separate security equipment or key exchange protocols.
2Reliability
If encryption or direct sequence spread spectrum is used to secure transmission, then signal security is improved, but the system requires exchange of security information such as keys or codebooks between transmitter and receiver
Solution Approach 1:
The patent extracts the security mechanism from separate key exchange protocols and integrates it directly into the signal waveform itself. The security information is embedded in the arbitrary waveform parameters rather than being transmitted separately, eliminating the need for key or codebook exchange.
Solution Approach 2:
The arbitrary waveform acts as an intermediary that carries both the data and the security mechanism simultaneously. Instead of using separate channels for data and security information, the waveform parameters serve as the mediator that embeds security directly in the transmitted signal.
3Reliability
If arbitrary frequency modulation with bounded parameters is used, then signal security is improved by obscuring signal characteristics, but the receiver must iteratively adjust parameters which increases processing time
Solution Approach 1:
The receiver performs iterative parameter adjustment, trying multiple combinations of waveform parameters until the correct one is found. This excessive action (trying more than necessary) ensures security by brute-force searching through the bounded parameter space, guaranteeing that adversarial receivers cannot easily decode the signal.
Data Source
AI summary
A transmitter includes: a data providing component that provides data to be transmitted; a transforming component that generates transformed data based on the data to be transmitted; and a transmitting component that transmits the transformed data. The transforming component includes a modulator, a code generator and a data structure having stored therein a first mathematical function. The first mathematical function includes a primary first function term. The primary first function term includes a first parameter within a predetermined first delineated boundary of parameters. The code generator generates coded data so as to form an error-detecting code from the data to be transmitted. The modulator modulates the coded data with the primary first function term.