Carrier Signal Extraction Using Transpositional Modulation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing carrier modulation techniques face challenges in extracting and managing carrier signals from modulated signals, especially when the carrier is suppressed or when little a priori information about the modulated signal is available, limiting the ability to combine different modulation types on a single carrier frequency and increasing bandwidth effectively.
Innovation Solution
The method involves detecting the center frequency of an input signal, generating a difference signal, and using a signal generator to modify the frequency of a second signal to extract and modulate the carrier signal with a transpositional modulation (TM) signal, allowing for the combination and separation of TM signals from traditional modulation schemes without interfering with existing signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional signal modulation techniques are used, then information can be transmitted from one location to another, but the ability to extract carrier signals is limited when the carrier is suppressed or when little a priori information is available
Solution Approach 1:
The patent introduces an intermediary signal generator that produces a reference signal to assist in carrier extraction. This reference signal acts as a mediator between the modulated signal and the extraction process, enabling carrier recovery even when the carrier is suppressed or when minimal a priori information is available about the modulated signal.
2Productivity
If multiple modulation types are combined on a single carrier frequency, then bandwidth is increased, but the complexity of separating and managing different modulation types increases
Solution Approach 1:
The patent applies segmentation by separating different modulation types into distinct processing paths. The system divides the combined modulated signal into separate components, allowing each modulation type to be independently extracted and processed, thereby managing complexity while maintaining high bandwidth utilization.
Solution Approach 2:
The patent uses intermediary processing stages that facilitate the separation of combined modulation types. These intermediary components act as mediators that systematically decompose the complex combined signal into its constituent modulation types, reducing the overall system complexity while enabling effective bandwidth utilization.
3Adaptability or versatility
If carrier signals are extracted with minimal information, then the system becomes more versatile, but the precision of carrier frequency detection may be reduced
Solution Approach 1:
The patent implements feedback mechanisms that continuously refine carrier frequency detection. The system uses feedback loops to adjust and optimize the extracted carrier signal, maintaining high detection accuracy even when operating with minimal a priori information about the modulated signal, thus preserving both versatility and precision.
Data Source
AI summary
Methods, systems, and apparatus for receiving an input signal, where the input signal includes a carrier signal modulated with a first modulation signal and a second modulation signal, and where the second modulation signal is a TM signal. Demodulating the first modulation signal from the input signal. Modulating an un-modulated carrier signal with the first modulation signal to generate a third signal, where the third signal includes the carrier signal modulated by the first modulation signal. And, removing the first modulation signal from the input signal by subtracting the third signal from the input signal to extract the TM signal from the input signal.