Beamforming Vector Generation via Precoding Matrix Combination

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing MIMO communication systems face challenges in generating beamforming vectors that consider interference between neighboring cells, leading to inefficient data transmission and increased interference.

Innovation Solution

A method is introduced where a serving base station instructs a terminal to combine specific precoding matrices, one that maximizes transmission power to the serving base station and another that minimizes interference to neighboring base stations, to generate a beamforming vector that mitigates interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a beamforming vector is used to control transmission direction, then data transmission efficiency is improved, but interference between neighboring cells increases

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidinterference between neighboring cells

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the beamforming vector generation into two independent components: a first beamforming vector for maximizing transmission power to the serving base station, and a second beamforming vector for minimizing interference to neighboring base stations. These are then combined linearly to create the final beamforming vector, allowing independent optimization of each function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different optimization criteria to different parts of the beamforming vector. The first beamforming vector is optimized locally for maximum transmission power to the serving base station, while the second beamforming vector is optimized locally for minimum interference to neighboring cells. This allows each component to fulfill its specific local function effectively.

Inventive Principle:

Principle #3Local quality

2Reliability

If transmission power is maximized to serving base station, then transmission quality is improved, but interference to neighboring base stations increases

Engineering Contradiction:

Improvetransmission qualityVSAvoidinterference to neighboring base stations

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent divides the beamforming optimization into two separate vectors: one that maximizes transmission quality to the serving base station and another that minimizes interference to neighboring base stations. By segmenting this function, both objectives can be achieved simultaneously without compromising either.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent merges the two separate beamforming vectors (one for maximum transmission power and another for minimum interference) into a single combined beamforming vector through linear combination. This merging allows the system to achieve both maximum transmission quality and minimum interference simultaneously.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS8571128B2Method to generate beamforming vector and provide the information for generating beamforming vector

Publication Date: 2013.10.29 ELECTRONICS & TELECOMM RES INST

AI summary

A method to generate a beamforming vector by a terminal includes receiving information on a first precoding matrix and a second precoding matrix from a serving base station; and generating a beamforming vector by linearly combining the first precoding matrix and the second precoding matrix.