Digital Transmission Channel Property Determination
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Solution Overview
Problem
Existing systems for determining properties of transmission channels require analog circuits, limiting the use of simple digital ICs and making them more sensitive to process fluctuations, necessitating a purely digital circuit design that minimizes external components.
Innovation Solution
A device with a one-bit analog-digital converter, inverter, low-pass and high-pass filters, dot product unit, and digital-to-analog converter to process signals digitally, allowing for the determination of transmission channel properties with minimal external components and reduced sensitivity to process fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If analog circuits are used for signal processing in transmission channel determination, then signal processing capability is maintained, but device complexity increases and manufacturing precision requirements worsen due to sensitivity to process fluctuations
Solution Approach 1:
The patent replaces analog electronic circuits with a digital circuit implementation. The analog signal processing functions are substituted by digital signal processing using a one-bit analog-digital converter, digital filters (low-pass and high-pass), a dot product unit, and digital-to-analog converter. This substitution eliminates the sensitivity to process fluctuations inherent in analog circuits while maintaining the required signal processing capabilities through purely digital logic operations.
2Ease of manufacture
If mixed-signal test systems are used to test integrated circuits, then testing capability is achieved, but testing complexity and cost increase
Solution Approach 1:
The invention implements a fully digital circuit architecture that can be tested using standard digital test equipment rather than requiring complex mixed-signal test systems. The one-bit analog-digital converter digitizes the receiver output signal, and all subsequent processing (low-pass filtering, high-pass filtering, dot product calculation, integration) is performed in the digital domain, enabling compatibility with simple digital test infrastructure.
3Manufacturing precision
If purely digital circuit design is implemented, then sensitivity to process fluctuations is reduced, but signal processing capability may be limited
Solution Approach 1:
The patent employs parameter changes in the form of digital filtering operations (low-pass and high-pass filters) and signal modulation techniques (dot product with binary control signal) to maintain full signal processing capability in the digital domain. The one-bit analog-digital converter captures the essential signal information, and digital processing algorithms reconstruct and analyze the transmission channel properties with accuracy comparable to analog systems while benefiting from digital robustness.
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
Enables the determination of transmission channel properties using purely digital circuits, reducing chip area and sensitivity to process fluctuations, while maintaining effective signal processing and interference reduction.
Implementation Method 1
a low-pass filter for feedback of the output of the one-bit analog-digital converter to the inverter input
Implementation Method 2
a high-pass filter, in particular in the form of a capacitor, between the input of the one-bit analog-digital converter and the inverter input
Implementation Method 3
an inverter having a switching threshold with an inverter with the Input of the one-bit analog-digital converter and an inverter output coupled to the output of the one-bit analog-digital converter
Implementation Method 4
a filter with an integrating filter effect for forming the dot product result signal
Data Source
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AI summary
The device for determining at least one property of a transmission channel between a signal transmitter (2) and a receiver (3) is provided with an analog-to-digital converter (22, 9, 10a, 10b, 10c) which has an input (6) for coupling to the signal transmitter (2) and an output (11). Furthermore, the device is provided with a capacitor (5) connected in series between the signal transmitter (2) and the input (6) of the analog-to-digital converter (22, 9, 10, a, b, c), and a scalar product unit (12) for determining the scalar product between the output signal of the analog-to-digital converter (22, 9, 10, a, b, c) and a reference clock signal (25, 27). The device includes a filter (13,14) for filtering the product result signal and a multiplication unit (26) for multiplying the output signal of the filter (13,14) with the reference clock signal (25,27).The device is provided with a digital-to-analog converter or a PWM unit (16) for converting the digital multiplication result signal into an analog signal, wherein the output signal of the digital-to-analog converter or the PWM unit (16) is coupled to the input of the analog-to-digital converter (22,9,10,a,b,c).