RF Measurement Instrument Self-Validation Without Known Symbol Sequences
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Solution Overview
Problem
Existing measurement instruments struggle to reliably detect detection errors in RF signals with low signal-to-noise ratios without prior knowledge of the actual symbol sequence, leading to inaccurate measurements.
Innovation Solution
A measurement instrument with a reference signal module that generates a reference signal based on the received RF signal, an error module to determine error vectors, and an analysis module to assess the correctness of the reference signal based on these vectors, allowing error detection without prior knowledge of the symbol sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actual symbol sequence is known, then detection errors can be corrected reliably, but the measurement instrument cannot operate when the symbol sequence is unknown
Solution Approach 1:
The measurement instrument performs self-validation by using its own extracted reference signal to generate and analyze error vectors. The system serves itself by internally assessing the correctness of its own measurements through statistical analysis of error distributions, eliminating the need for external knowledge of the actual symbol sequence.
Solution Approach 2:
The system implements feedback by analyzing error vectors derived from the difference between the RF signal and the extracted reference signal. The statistical properties of these error vectors provide feedback information about the quality and correctness of the reference signal extraction, enabling the system to assess measurement reliability without knowing the ground truth symbol sequence.
2Adaptability or versatility
If error detection is performed without knowing the symbol sequence, then operational flexibility is improved, but error detection reliability deteriorates
Solution Approach 1:
The system changes the parameter being analyzed from the symbol sequence itself to the statistical properties of error vectors. By transforming the problem from direct symbol verification to statistical error distribution analysis, the system maintains reliability while achieving operational flexibility in unknown symbol sequence scenarios.
Solution Approach 2:
The patent replaces the mechanical approach of direct symbol sequence comparison (which requires knowledge of the actual sequence) with a statistical field-based approach. Instead of mechanically verifying each symbol against a known sequence, the system uses statistical analysis of error vector distributions to assess overall measurement quality.
3Measurement precision
If traditional error correction methods are used, then measurement accuracy is maintained, but measurement time increases due to the need for symbol sequence knowledge
Solution Approach 1:
Instead of performing complete error correction that would require full knowledge of the symbol sequence, the system performs partial action by analyzing only the statistical properties of error vectors. This partial analysis is sufficient to assess measurement quality without the time-consuming process of full error correction or symbol sequence verification.
Data Source
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AI summary
A measurement instrument (14) is described. The measurement instrument (14) comprises at least one input port (16) and a measurement module (18). The input port (16) is configured to receive a radio frequency (RF) signal from a device under test (12), wherein the RF signal comprises a symbol sequence. The measurement module (18) is configured to receive the RF signal from the input port (16). The measurement module (18) comprises a reference signal module (26), wherein the reference signal module (26) is configured to generate a reference signal based on the received RF signal, wherein the reference signal comprises an extracted symbol sequence corresponding to the symbol sequence of the RF signal. The measurement module (18) further comprises an error module (30), wherein the error module (30) is configured to determine error vectors based on the RF signal and based on the reference signal. The measurement module (18) further comprises an analysis module (32), wherein the analysis module (32) is configured to determine whether the reference signal is correct based on the determined error vectors.