Pre-Distortion Circuit Using Discontinuous Single-Tone Signals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing transceiver devices face high peak currents due to continuous baseband signals, leading to increased power supply burden and system costs.
Innovation Solution
Implementing a pre-distortion circuit that outputs discontinuous single-tone baseband signals, which reduces peak currents by allowing capacitors to discharge during idle intervals, thereby reducing power supply burden and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous baseband signals are used in the pre-distortion circuit, then the power amplifier can operate continuously, but the peak current increases and the power supply burden increases
Solution Approach 1:
The patent applies periodic action by using discontinuous single-tone signals instead of continuous signals. The pre-distortion circuit outputs signals with periodic intervals where the signal is active during certain time periods and inactive during other periods, allowing capacitors to discharge during idle intervals. This periodic on-off pattern reduces peak current while maintaining effective power amplifier operation during active periods.
2Reliability
If continuous baseband signals are used, then the signal transmission is uninterrupted, but the system cost increases due to higher power supply requirements
Solution Approach 1:
The patent reduces system cost through periodic action by implementing discontinuous signal transmission. The pre-distortion circuit generates single-tone signals that are transmitted periodically rather than continuously, allowing power supply components to be designed with lower peak current ratings. This reduces the cost of power supply components while maintaining effective communication during active signal periods.
Data Source
AI summary
A transceiver device includes a pre-distortion circuit and a radio frequency end circuit. The pre-distortion circuit is configured to output a first baseband signal. The first baseband signal is a non-continuous single-tone signal. The radio frequency end circuit is coupled to the pre-distortion circuit. The radio frequency end circuit includes a transmitter circuit and a receiver circuit. The transmitter circuit includes a power amplifier and is configured to output a loop-back signal according to the first baseband signal. The receiver circuit is configured to receive the loop-back signal. The pre-distortion circuit is further configured to receive a second baseband signal generated according to the loop-back signal, and generate a pre-distortion compensation signal according to the first baseband signal and the second baseband signal. The pre-distortion compensation signal corresponds to a non-linear characteristic of the power amplifier.