Beamforming Precoding Matrix for Multi-User Interference

Solution Overview

Problem

Communication devices face interference issues when transmitting signals to multiple terminals, leading to distorted phase shifts in signals generated via phase shift keying (PSK) methods, which reduces signal strength and efficiency.

Innovation Solution

A communication device method that determines a target transmission vector and beam selection matrix to generate a precoding matrix, amplifying signal strength by utilizing interference vectors from other terminals, thereby creating constructive interference for each target terminal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If beamforming is used to transmit signals to multiple terminals, then signal directionality and transmission efficiency are improved, but interference between terminals causes phase distortion in PSK signals

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidphase accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent converts harmful interference into beneficial constructive interference by designing the precoding matrix to exploit interference patterns. Specifically, the precoding matrix is constructed to create signal components that, while appearing as interference to some terminals, actually reinforce the desired signal for target terminals, thereby converting the harmful effect of multi-user interference into a beneficial signal enhancement mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the parameter of signal phase by introducing phase rotation in the precoding matrix construction. The phase rotation parameter is specifically designed to adjust the phase of signal components such that interference from other terminals is transformed into constructive interference for the target terminal, thereby maintaining phase accuracy while enabling multi-user transmission.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If transmission signals are generated via PSK method, then modulation efficiency is improved, but interference causes phase distortion of the transmission signal

Engineering Contradiction:

Improvemodulation efficiencyVSAvoidphase precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent converts harmful interference into beneficial constructive interference by designing the precoding matrix to exploit interference patterns. Specifically, the precoding matrix is constructed to create signal components that, while appearing as interference to some terminals, actually reinforce the desired signal for target terminals, thereby converting the harmful effect of multi-user interference into a beneficial signal enhancement mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent changes the parameter of signal phase by introducing phase rotation in the precoding matrix construction. The phase rotation parameter is specifically designed to adjust the phase of signal components such that interference from other terminals is transformed into constructive interference for the target terminal, thereby maintaining phase accuracy while enabling multi-user transmission.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If multiple transmission signals are sent simultaneously to different terminals, then system capacity is improved, but interference between signals reduces overall communication performance

Engineering Contradiction:

Improvesystem capacityVSAvoidcommunication performance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the transmission process by assigning different precoding vectors to different terminals, where each precoding vector is specifically designed to direct the signal to its target terminal while managing interference. This segmentation allows multiple signals to be transmitted simultaneously with reduced mutual interference, thereby increasing system capacity while maintaining communication performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent converts harmful interference into beneficial constructive interference by designing the precoding matrix to exploit interference patterns. Specifically, the precoding matrix is constructed to create signal components that, while appearing as interference to some terminals, actually reinforce the desired signal for target terminals, thereby converting the harmful effect of multi-user interference into a beneficial signal enhancement mechanism.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS11689262B2Communication device for performing beamforming and operating method thereof

Publication Date: 2023.06.27 SAMSUNG ELECTRONICS CO LTD

AI summary

An operating method of a communication device for providing a beamformed transmission signal to a plurality of terminals may include determining a target transmission vector based on an area restriction condition for each of the plurality of terminals, generating a beam selection matrix for selecting some of a plurality of antennas based on the target transmission vector and a beam selection condition, generating a precoding matrix based on the target transmission vector and the beam selection matrix, and generating a transmission signal based on the beam selection matrix and the precoding matrix.