Adaptive Channel Simulator Tap Parameter Rounding
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Solution Overview
Problem
High-frequency communications systems, such as LTE and 5G, require channel simulators with pico-second time resolution, leading to high hardware demands that are not necessary for all devices under test, necessitating a solution to reduce hardware complexity and flexibility in channel simulation.
Innovation Solution
A measuring device with a channel simulator that modifies tap parameters by rounding delay values and combining taps, using simpler hardware components, and considers the capability of the device under test to generate signals with reduced accuracy, thereby reducing hardware effort and increasing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If channel simulator operates with pico-second time resolution to simulate multipath propagation accurately, then measurement precision is improved, but device complexity increases significantly
Solution Approach 1:
The patent applies local quality by adapting the time resolution of the channel simulator to match the specific capabilities of the device under test. Instead of uniformly using pico-second resolution for all measurements, the system selectively reduces resolution to nanosecond or microsecond levels when the device under test cannot utilize higher precision, thereby maintaining measurement adequacy while reducing hardware complexity locally in the signal processing path.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the time resolution parameter of the channel simulator based on the capability parameters of the device under test. The system modifies operational parameters such as delay resolution and tap spacing to align with the device's processing capabilities, transforming the fixed high-resolution configuration into an adaptive one that reduces hardware demands while preserving essential measurement accuracy.
2Reliability
If channel simulator uses high time resolution for accurate channel simulation, then reliability of measurement is improved, but ease of manufacture worsens due to higher hardware requirements
Solution Approach 1:
The patent applies parameter changes by modifying the operational parameters of the channel simulator to match the device under test's capabilities. By adjusting time resolution, delay values, and tap spacing parameters, the system maintains measurement reliability for the target device while using simpler, more manufacturable hardware components that do not require pico-second level precision.
Solution Approach 2:
The patent implements partial action by providing only the level of measurement precision that is actually needed for the device under test. Instead of always using maximum precision (excessive action), the system delivers appropriate precision matched to device capabilities, reducing hardware complexity and manufacturing difficulty while maintaining sufficient measurement reliability.
3Measurement precision
If channel simulator provides high accuracy signal generation, then measurement precision is improved, but device complexity increases due to higher processing requirements
Solution Approach 1:
The patent applies local quality by matching the signal generation accuracy to the local capabilities of the device under test. The system adjusts processing accuracy, time resolution, and computational precision locally according to what the specific device can handle, avoiding unnecessary high-precision processing that would increase complexity without providing additional benefit.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting signal generation parameters such as time resolution, delay precision, and amplitude quantization based on the device under test's capability parameters. This transforms the signal generation process from fixed high-precision operation to adaptive operation that maintains adequate accuracy while reducing processing complexity.
4Measurement precision
If channel simulator is designed for maximum capability devices, then adaptability worsens, but measurement precision for those devices is improved
Solution Approach 1:
The patent implements universality by designing the measuring device to function across multiple device types and capability levels. The system uses capability parameter detection and adaptive parameter modification to serve both high-capability devices requiring precise measurements and lower-capability devices with simpler hardware, making the measuring device universally applicable rather than specialized for a single device class.
Solution Approach 2:
The patent applies dynamics by making the measuring device adaptable rather than static. The system dynamically detects the capability parameters of the connected device and adjusts its operational parameters in real-time, transforming from a fixed-precision instrument to a flexible one that optimizes performance for each specific device while maintaining broad compatibility.
Data Source
AI summary
A measuring device comprising a channel simulator is provided. The channel simulator is adapted to simulate multipath propagation by modifying a first measuring signal, using a plurality of taps defined by tap parameters, resulting in a second measuring signal. The measuring device moreover comprises a parameter modifier, adapted to modify input tap parameters, resulting in the tap parameters.