Direct sampling for digital predistortion calibration
CN113206642BActive Publication Date: 2026-07-03MAXLINEAR INC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MAXLINEAR INC
- Filing Date
- 2021-01-28
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
In existing MIMO transceivers, signal distortion is caused by the nonlinear amplification of the power amplifier, and existing DPD calibration technology increases the circuit footprint and cost.
Method used
Direct sampling technology is used for DPD calibration. By sampling and buffering the signal at the baseband frequency, the down-conversion process is avoided, which reduces the circuit area and cost.
Benefits of technology
It effectively compensates for the nonlinearity of the power amplifier, reduces signal distortion, improves signal quality and data rate, and at the same time reduces the production cost and circuit complexity of MIMO transceivers.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN113206642B_ABST
Abstract
This invention relates to direct sampling for digital predistortion calibration. The invention discloses a MIMO transceiver that may include a communication chain configured to generate a signal at a first frequency. The first communication chain may include a predistorter configured to receive predistortion parameters to predistort the signal. The communication chain may include a power amplifier (PA) to amplify the signal. The MIMO transceiver may include a digital signal generation (DPD) chain configured to receive the signal at the first frequency. The DPD chain may include a data converter to sample the signal using a sampling rate based on the baseband frequency. The data converter may be configured to generate a sampled signal based on the sampling of the signal. The DPD chain may include a buffer configured to buffer the sampled signal. The MIMO transceiver may include DPD circuitry configured to calibrate the predistortion parameters based on the buffered sampled signal to compensate for nonlinearities amplified by the PA of the communication chain.
Need to check novelty before this filing date? Find Prior Art