Non-Constant Envelope Signal Power Measurement
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Solution Overview
Problem
Current methods for measuring the power of non-constant envelope modulated signals in wireless terminal devices are inefficient due to high measurement errors when sampling over short periods, leading to increased measurement times and reduced production line efficiency.
Innovation Solution
A method involving sampling baseband I/Q data within a short duration less than the signal cycle, calculating sample power, matching the data to obtain a target baseband I/Q data segment, and using power calibration values to determine the actual power, allowing for rapid and accurate power measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If power measurement is performed over a long period of time to reduce measurement error, then measurement precision is improved, but measurement time increases and productivity decreases
Solution Approach 1:
The patent pre-calculates and stores power calibration values for all possible baseband I/Q data segments before actual measurement. This preliminary preparation allows the measurement system to quickly retrieve and apply the appropriate calibration value during production line testing, eliminating the need for long-duration measurements while maintaining high precision.
Solution Approach 2:
The patent pre-calculates and stores power calibration values for all possible baseband I/Q data segments before actual measurement. This preliminary preparation allows the measurement system to quickly retrieve and apply the appropriate calibration value during production line testing, eliminating the need for long-duration measurements while maintaining high precision.
2Productivity
If power measurement is performed over a short period of time to increase productivity, then measurement speed is improved, but measurement precision deteriorates due to larger errors
Solution Approach 1:
The patent creates a calibrated reference model by measuring and storing power calibration values for all possible baseband I/Q data segments in advance. During actual measurement, the system copies the appropriate pre-calibrated value from this reference model based on matching the sampled data, enabling fast and accurate measurement without requiring long measurement durations.
3Measurement precision
If the sampling duration is extended to cover a full signal cycle to improve measurement accuracy, then measurement precision is improved, but measurement time increases
Solution Approach 1:
The patent creates a calibrated reference model by measuring and storing power calibration values for all possible baseband I/Q data segments in advance. During actual measurement, the system copies the appropriate pre-calibrated value from this reference model based on matching the sampled data, enabling fast and accurate measurement without requiring long measurement durations.
Data Source
AI summary
The disclosure provides a method for measuring a power of a non-constant envelope modulated signal, an electronic device, and a computer readable storage medium. The method includes: sampling baseband I/Q data transmitted by a device under test to obtain sample data, in which a sampling duration is less than a length of a cycle of the non-constant envelope modulated signal; calculating a sample power within the sampling duration based on the sample data; matching in predetermined baseband I/Q data in the cycle based on the sample data to obtain a target baseband I/Q data segment; obtaining a power calibration value corresponding to the target baseband I/Q data segment; and obtaining an actual power of the non-constant envelope modulated signal in the cycle based on the power calibration value corresponding to the target baseband I/Q data segment and the sample power within the sampling duration.