PAR-Based Power Management for Wireless Devices
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Solution Overview
Problem
Current power management techniques in wireless communication devices, such as average power tracking and envelope tracking, are inefficient and costly, especially for power levels below 20 decibels, as they require additional components and increase device size and power consumption.
Innovation Solution
The implementation of Peak to Average Ratio (PAR) based power management, where a device determines a PAR value for a time slot and adjusts the bias value to optimize the voltage applied to the power amplifier, reducing power dissipation without the need for additional digital-to-analog converters, thereby improving power efficiency and reducing device size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If average power tracking or envelope tracking is used for power management, then power amplifier efficiency is improved, but device size increases and additional components (digital-to-analog converters) are required
Solution Approach 1:
The patent extracts and eliminates the digital-to-analog converter component from the power management system. Instead of using traditional envelope tracking that requires a digital-to-analog converter to generate analog envelope signals, the invention uses digital signal processing to directly calculate PAR values and determine bias values, thereby removing the unnecessary component while maintaining power amplifier efficiency improvement
Solution Approach 2:
The baseband processor is made multi-functional by enabling it to perform both signal processing and power management functions. The baseband processor calculates PAR values from digital signal samples, determines appropriate bias values, and controls the power amplifier's operating state, thereby eliminating the need for separate dedicated hardware components and reducing overall device complexity
2Loss of energy
If envelope tracking is implemented to reduce power consumption, then power efficiency improves, but device cost and complexity increase due to additional components
Solution Approach 1:
The patent removes the digital-to-analog converter from the power management architecture. By performing all power management calculations in the digital domain and only applying the final bias control decisions, the system achieves power consumption reduction without requiring the additional expensive component that traditional envelope tracking systems need
Solution Approach 2:
The patent replaces the mechanical/electrical component (digital-to-analog converter) with a digital signal processing approach. Instead of using hardware circuitry to generate analog control signals, the system uses digital algorithms to calculate PAR values and determine bias adjustments, substituting complex hardware with software-based processing
3Ease of operation
If traditional power management techniques are used, then power amplifier control is simplified, but power consumption increases especially for power levels below 20 decibels
Solution Approach 1:
The patent performs preliminary calculation of the PAR value from digital signal samples before the actual power amplification occurs. By pre-calculating the peak-to-average ratio and determining the appropriate bias value in advance, the system optimizes power consumption without requiring complex real-time control mechanisms, thus maintaining control simplicity while reducing power usage
Solution Approach 2:
The patent introduces dynamic adaptation of the power amplifier's bias state based on the calculated PAR value. Instead of using fixed or simple average power control, the system dynamically adjusts the bias level according to the actual signal characteristics, enabling optimized power consumption that adapts to varying signal conditions while maintaining operational simplicity
Data Source
AI summary
Certain aspects of the present disclosure generally relate to wireless communications. In some aspects, a device may determine a peak to average ratio (PAR) value for a portion of a wireless transmission. In some aspects, the device may cause, based on the PAR value, a voltage to be applied to a power amplifier of the device to cause the device to transmit the portion of the wireless transmission.