Analog Correlator Using Transmission-Line Delay for High-Speed Sync
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Solution Overview
Problem
Conventional digital correlators face challenges in high-speed data communication due to difficulties in embodying broadband mixers and template generators for synchronization, leading to increased power consumption and inability to process signals effectively in very high-speed data communication environments.
Innovation Solution
An analog correlator using a single transmission line as a signal delay circuit with parallel analog multipliers and an adder, incorporating a lumped element comprising a variable capacitor and inductor, which allows for adjustable signal delay and voltage application to adapt to varying communication environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional digital correlator is used for high-speed data communication, then digital signal processing capability is provided, but it cannot effectively process very high speed signals and power consumption increases
Solution Approach 1:
The patent replaces the digital correlator system (mechanical/electronic system with multiple components) with an analog transmission line system. The transmission line inherently provides delay functionality without requiring active digital processing components, thereby reducing power consumption while maintaining high-speed signal processing capability.
Solution Approach 2:
The transmission line automatically provides the required signal delay function through its physical properties (propagation velocity and length). This self-service characteristic eliminates the need for external control mechanisms and active components, resulting in minimal power consumption while handling very high speed signals.
2Adaptability or versatility
If broadband mixers and template generators are implemented for synchronization in high-speed communication, then signal synchronization capability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the delay function from complex active components (mixers and template generators) and implements it using the passive transmission line's inherent properties. This extraction simplifies the overall correlator structure by removing unnecessary active components while maintaining synchronization capability through the transmission line's controlled delay characteristics.
Solution Approach 2:
The transmission line serves multiple functions simultaneously: it provides signal delay, acts as a broadband transmission medium, and enables synchronization without requiring separate dedicated components. This multi-functionality reduces device complexity while maintaining adaptability to varying communication environments.
3Loss of time
If digital delay circuits are used in conventional correlators, then signal delay functionality is provided, but very high speed signal processing becomes impossible
Solution Approach 1:
The patent replaces digital delay circuits (discrete, clocked elements with limited bandwidth) with an analog transmission line (continuous medium with broadband capability). This substitution enables the system to process very high speed signals that exceed the capabilities of digital circuits, while still providing precise delay control through the line's physical dimensions and propagation characteristics.
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
The analog correlator effectively processes high-speed data communication signals with controlled signal delay, reducing power consumption and improving synchronization, enabling adaptive operation in diverse communication environments.
Implementation Method 1
a single transmission line receiving an input signal and being used as a signal delay circuit
Implementation Method 2
The capacitor is a variable capacitor which can adjust signal delay
Implementation Method 3
The inductor is a coil that can be used as a variable resistance
Data Source
AI summary
An analog correlator for very high speed data communication, including a single transmission line receiving an input signal and used as a signal delay circuit, a plurality of analog multipliers connected in parallel with a predetermined gap from the transmission line, for receiving a predetermined size of voltages, respectively, and an adder for adding the signals from the plurality of analog multipliers and transmitting the resultant signal as an output signal. The analog correlator can perform very high speed data communication, and can be applied to a high precision position estimation system. Moreover, the time delay is controlled in each part of the transmission line by adjusting a size of a variable capacitor. As a result, the length of the transmission line can be adjusted. Furthermore, the correlator is adaptively used according to variations of the very high speed communication environment by adjusting voltages of application voltage devices.