Wireless Receiver Gain Control Using Signal Power Variance
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Solution Overview
Problem
Wireless communication devices face challenges in controlling signal power effectively, particularly in varying frequency resource allocations, leading to signal saturation in the frequency domain during high-speed communications and in scenarios like V2X, where quick power adjustments are necessary.
Innovation Solution
A method and system that measure signal power variance at multiple time points, calculate the variance, and adjust the gain level of a variable gain amplifier to prevent signal power saturation by estimating the number of frequency resources allocated, ensuring optimal signal power before demodulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal power is increased to maintain communication quality during high-speed movement, then communication reliability is improved, but signal saturation occurs in the frequency domain
Solution Approach 1:
The patent measures signal power at multiple time points before demodulation and calculates variance in advance. This preliminary action allows the system to predict potential saturation conditions and adjust gain levels proactively, preventing signal saturation before it occurs in the frequency domain while maintaining communication reliability during high-speed movement
Solution Approach 2:
The patent implements a feedback mechanism where signal power measurements taken at multiple time points are used to calculate variance, which then informs gain level adjustments. This closed-loop feedback allows the system to dynamically respond to signal conditions, adjusting amplification to prevent saturation while maintaining optimal communication quality
2Adaptability or versatility
If gain level is adjusted quickly to respond to varying resource allocations, then adaptability is improved, but signal power control precision deteriorates
Solution Approach 1:
The patent performs preliminary measurements of signal power at multiple time points and calculates variance before final gain determination. This preliminary action provides a statistical basis for gain adjustment, allowing quick adaptation to resource allocation changes while maintaining precision through variance-based decision making rather than abrupt gain changes
Solution Approach 2:
The patent changes the parameter used for gain control from instantaneous signal power to variance of signal power across multiple time points. This parameter transformation allows the system to adapt quickly to resource allocation changes while maintaining control precision, as variance provides a more stable and representative metric for amplification decisions
Data Source
AI summary
A method of controlling a signal power of a received signal received by a wireless communication device, the method including: measuring the signal power of the received signal at a plurality of time points in response to a gain control signal; calculating a variance of the signal power of the received signal at least some time points of the plurality of time points; and controlling the signal power of the received signal based on a gain level determined according to the variance of the signal power of the received signal.