18422913. LOW COMPLEXITY DIRECT-TO-LUT DIGITAL PRE-DISTORTION METHOD simplified abstract (SAMSUNG ELECTRONICS CO., LTD.)
Contents
LOW COMPLEXITY DIRECT-TO-LUT DIGITAL PRE-DISTORTION METHOD
Organization Name
Inventor(s)
Paul Nicholas Fletcher of Impington (GB)
LOW COMPLEXITY DIRECT-TO-LUT DIGITAL PRE-DISTORTION METHOD - A simplified explanation of the abstract
This abstract first appeared for US patent application 18422913 titled 'LOW COMPLEXITY DIRECT-TO-LUT DIGITAL PRE-DISTORTION METHOD
The patent application describes a distortion apparatus for a power amplifier that includes pre-distortion circuitry with a memory polynomial look-up-table (LUT) circuit and post-distortion circuitry that updates the pre-distortion circuitry based on the power amplifier's output.
- The pre-distortion circuitry consists of multiple LUTs, each corresponding to a different memory depth of a memory polynomial of a Volterra series.
- Each LUT is indexed by the instantaneous power of an input sample delayed by an amount, corresponding to a specific memory depth.
- The output of the memory polynomial LUT circuit is a summation of each LUT's output multiplied by the input sample delayed by the respective memory depth.
- The output of the pre-distortion circuitry is then provided to the power amplifier for processing.
Potential Applications: - Wireless communication systems - Radar systems - Satellite communication systems
Problems Solved: - Reducing distortion in power amplifiers - Improving signal quality in communication systems
Benefits: - Enhanced signal integrity - Increased efficiency in power amplifiers - Improved overall system performance
Commercial Applications: This technology can be utilized in the telecommunications industry for improving the quality and efficiency of wireless communication systems, radar systems, and satellite communication systems.
Questions about the technology: 1. How does the memory polynomial look-up-table circuit improve the performance of the power amplifier? 2. What are the key advantages of using pre-distortion circuitry in power amplifiers?
Original Abstract Submitted
A distortion apparatus for a power amplifier comprises: pre-distortion circuitry that comprises a memory polynomial look-up-table (LUT) circuit; and post-distortion circuitry that updates the pre-distortion circuitry based on an output of the power amplifier. The pre-distortion circuitry comprises a plurality of LUTs. Each LUT corresponds to a different memory depth of a memory polynomial of a Volterra series. Each LUT indexed by an instantaneous power of an input sample delayed by an amount corresponds to a respective memory depth of each LUT. An output of the memory polynomial LUT circuit corresponds to a summation of an output of each LUT multiplied by the input sample delayed by the amount corresponding to the respective memory depth of each LUT, and an output of the pre-distortion circuitry is provided to the power amplifier.
