Envelope Tracking Mapping for Higher RF Sampling Throughput
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Solution Overview
Problem
Existing envelope tracking technologies have limited data throughput due to restricted sampling bandwidth, which hampers the efficiency of power amplifiers in mobile terminals, especially under high peak-to-average power ratio input signals.
Innovation Solution
A method that acquires and maps coordinates of instantaneous radio frequency envelope points to the same power supply voltage value, generating a mapping relationship to increase the envelope tracking sampling bandwidth without altering the operating bandwidth of the power supply, thereby enhancing data transmission capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If envelope tracking technology is used to improve power amplifier efficiency, then power consumption is reduced, but data throughput is limited due to restricted sampling bandwidth
Solution Approach 1:
The patent applies coordinate mapping to transform the envelope signal from time domain to a compressed domain, where multiple time points map to the same compressed coordinate. This dimensional transformation allows the limited bandwidth carrier to represent a wider bandwidth envelope signal, effectively increasing data throughput without changing the physical bandwidth of the power supply.
Solution Approach 2:
The patent changes the sampling rate parameter by using a lower sampling rate in the compressed domain while maintaining the same power supply bandwidth. By mapping multiple high-speed samples to fewer low-speed samples through coordinate compression, the system achieves equivalent bandwidth expansion without hardware changes.
2Productivity
If the operating bandwidth of the envelope tracking power supply is increased to improve data throughput, then more envelope signals can be carried, but the complexity and cost of the power supply system increases
Solution Approach 1:
The patent creates a compressed coordinate mapping that copies multiple high-bandwidth envelope signal points into a lower-bandwidth representation. This virtual copying allows the power supply to operate at lower bandwidth while still representing the full envelope signal information, avoiding the need for complex high-bandwidth power supply hardware.
Data Source
AI summary
Provided are an envelope tracking method and a mobile terminal. The envelope tracking method includes: acquiring coordinates of at least two points of an instantaneous radio frequency envelope each mapped to the same power supply voltage value; mapping the coordinates of the at least two points of the instantaneous radio frequency envelope each mapped to the same power supply voltage value to the same power supply voltage value to generate a mapping relationship; and transmitting data based on the mapping relationship.