Wireless Transmit Power Control for EVM and Spectral Mask Compliance
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Solution Overview
Problem
Existing wireless devices face limitations in transmit power due to regulatory constraints and device characteristics, such as EVM and spectral mask requirements, which hinder the increase of transmission range without increasing complexity, cost, or power consumption.
Innovation Solution
Wireless devices tailor transmit power based on actual operating conditions, including process splits, voltage, and temperature, using a multi-dimensional array to determine EVM and spectral mask compliant power, allowing higher transmit power within regulatory limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If transmit power is increased to extend transmission range, then transmission range is improved, but regulatory compliance deteriorates due to ACPR and spectral mask requirements
Solution Approach 1:
The patent changes the parameter of transmit power dynamically based on device characteristics (EVM, ACPR measurements) and operating conditions. By measuring actual device performance parameters and adjusting power accordingly, the system achieves maximum compliant power for each device, extending transmission range while maintaining regulatory compliance.
2Power
If device characteristics such as EVM or spectral mask margin are improved to increase transmit power, then transmit power is improved, but device complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where the device measures its own EVM and ACPR performance, then uses these measurements to determine appropriate transmit power levels. This closed-loop approach allows the device to automatically optimize power without requiring complex hardware modifications, achieving higher power while maintaining compliance through intelligent control rather than hardware complexity.
3Reliability
If a fixed conservative transmit power is used to ensure compliance across all conditions, then regulatory compliance is maintained, but transmission range is reduced
Solution Approach 1:
The patent transitions from static fixed power settings to dynamic power adjustment based on real-time device characteristics and operating conditions. By continuously measuring EVM, ACPR, temperature, and voltage, the system dynamically optimizes transmit power for each condition, ensuring compliance is maintained while maximizing transmission range in every operating scenario rather than using a conservative fixed power level.
Data Source
AI summary
Systems method and devices set transmit properties of wireless devices. Methods include identifying a plurality of parameters representing device parameters and operating characteristics of a wireless device, and identifying a data structure representing metric-compliant transmit properties of the wireless device across a plurality of device parameters and operating characteristics. Methods also include updating transmit properties of the wireless device based, at least in part, on the identified plurality of parameters and one or more data values included in the data structure, wherein the updating of the transmit properties updates them to be metric compliant for current operating characteristics of the wireless device.