Dynamic Power Amplifier Voltage Control for Wi-Fi
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Solution Overview
Problem
Wi-Fi technology in communications devices experiences high power consumption due to uniform static bias points for power amplifiers across different sending rates, leading to excessive battery electricity consumption.
Innovation Solution
A method and apparatus that dynamically adjust the supply voltage of power amplifiers based on the sending rate, using received attribute information such as RSSI and PER to determine optimal voltage values, allowing the power amplifier to adjust power consumption according to the specific sending rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uniform static bias points are set for the power amplifier across different sending rates, then the power amplifier can maintain stable operation, but power consumption remains high regardless of the actual sending rate
Solution Approach 1:
The patent applies dynamics by transitioning from static bias points to dynamic bias points that change according to the sending rate. The Wi-Fi chip dynamically adjusts the bias point of the power amplifier based on the current sending rate, making the system adaptive rather than fixed. This resolves the contradiction by allowing the power amplifier to operate stably at appropriate power levels for each specific sending rate scenario.
Solution Approach 2:
The patent changes the parameter of bias point from a fixed uniform value to variable values that depend on the sending rate. By changing the bias point parameter dynamically based on sending rate conditions, the system achieves both stable operation (through appropriate biasing) and reduced power consumption (by using lower bias points when sending rates are low).
2Reliability
If a high static bias point is set for the power amplifier to meet high rate signal requirements, then signal quality is maintained, but power consumption increases
Solution Approach 1:
The patent applies local quality by setting different bias points for different sending rate scenarios rather than using a single high bias point for all cases. For high sending rates, higher bias points maintain signal quality, while for low sending rates, lower bias points reduce power consumption. This localized adaptation resolves the contradiction by matching the bias point quality to the specific operational requirements.
Solution Approach 2:
The system dynamically adjusts the bias point based on the current sending rate requirements. When high rate signals are needed, the bias point is set high to maintain signal quality; when low rate signals are transmitted, the bias point is reduced to save power. This dynamic adjustment resolves the contradiction between signal quality and power consumption.
3Adaptability or versatility
If the power amplifier operates at high power consumption state continuously, then it can handle various sending rates, but battery electricity is consumed excessively
Solution Approach 1:
The patent makes the power amplifier's bias point dynamic rather than continuously high. The bias point adjusts to match the actual sending rate being used, allowing the system to handle various sending rates adaptively while avoiding continuous high power consumption. This resolves the contradiction between versatility and energy loss.
Solution Approach 2:
The patent changes the operating parameter (bias point) of the power amplifier based on the sending rate. Instead of maintaining a constantly high parameter setting for versatility, the system adjusts the parameter to appropriate levels for each sending rate scenario, reducing energy loss while maintaining the ability to handle various rates.
Data Source
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AI summary
Embodiments of the present invention relate to a method and an apparatus for reducing power. The method includes: identifying, by a wireless communications module included in a communications device, when a Wireless Fidelity Wi-Fi mode of the communications device is already enabled, whether service data to be sent exists currently; acquiring, by the wireless communications module, received attribute information if the service data exists currently; determining, by the wireless communications module by using the received attribute information, a sending rate for sending the service data; and determining, by the wireless communications module according to the sending rate, a supply voltage value of a power amplifier connected to the wireless communications module, so that the power amplifier amplifies, according to the supply voltage value, a service request signal carrying the service data.