MIMO Signal Detection Using Receiving Beamforming

Solution Overview

Problem

Massive MIMO systems face increased complexity and cost due to the large number of antennas, which results in significant data processing requirements and bandwidth needs at the receiver side, leading to hardware and resource inefficiencies.

Innovation Solution

The implementation of receiving beamforming to transform a large number of physical antennas into a smaller number of virtual antennas, reducing data processing and bandwidth requirements through the use of beamforming weights based on antenna correlation, allowing for efficient signal detection and processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a huge number of antennas are deployed in mMIMO system, then spectral efficiency is enhanced by 5 to 10 times, but data processing complexity and cost at receiver side increase significantly

Engineering Contradiction:

Improvespectral efficiencyVSAvoiddata processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extracts only the essential signal components from the full set of antenna signals by performing receiving beamforming to generate a reduced set of beamformed signals. This extraction process separates useful information from redundant data, maintaining detection accuracy while reducing the volume of signals requiring complex processing at the receiver.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the large number of antenna signals into multiple beamformed signal groups through receiving beamforming operations. By dividing the original signal set into manageable beamformed components, the system reduces processing complexity while preserving the ability to detect all necessary information through structured segmentation of the signal space.

Inventive Principle:

Principle #1Segmentation

2Productivity

If a huge number of antennas are deployed in mMIMO system, then spectral efficiency is enhanced by 5 to 10 times, but cost growth in receiver occurs due to increased amount of data to be processed

Engineering Contradiction:

Improvespectral efficiencyVSAvoidreceiver cost

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent extracts only the essential signal components from the full set of antenna signals by performing receiving beamforming to generate a reduced set of beamformed signals. This extraction process separates useful information from redundant data, maintaining detection accuracy while reducing the volume of signals requiring complex processing at the receiver.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent segments the large number of antenna signals into multiple beamformed signal groups through receiving beamforming operations. By dividing the original signal set into manageable beamformed components, the system reduces processing complexity while preserving the ability to detect all necessary information through structured segmentation of the signal space.

Inventive Principle:

Principle #1Segmentation

3Productivity

If a huge number of antennas are deployed in mMIMO system, then spectral efficiency is enhanced, but bandwidth requirements at receiver side increase significantly

Engineering Contradiction:

Improvespectral efficiencyVSAvoiddata bandwidth

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential signal components from the full set of antenna signals by performing receiving beamforming to generate a reduced set of beamformed signals. This extraction process separates useful information from redundant data, maintaining detection accuracy while reducing the volume of signals requiring complex processing at the receiver.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent combines multiple antenna signals into a smaller number of beamformed signals through receiving beamforming operations. By merging redundant signal components into consolidated beamformed outputs, the system reduces the total bandwidth requirements while preserving all necessary information through constructive signal combination.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11290171B2Method and apparatus for signal detection in a MIMO communication system

Publication Date: 2022.03.29 NOKIA SOLUTIONS & NETWORKS OY

AI summary

Embodiments of the present disclosure relate to methods and apparatuses for signal detection in a MIMO communication system. A receiver device according to an embodiment of the present disclosure comprises a remote unit and a baseband unit. The remote radio unit is configured to receive a first set of signals from a first number of receiving antennas, and the baseband unit comprises: an interfacing unit, configured to obtain the first set of signals from the remote radio unit; a beamforming unit, configured to generate a second set of signals associated with a second number of virtual antennas by performing receiving beamforming for the obtained first set of signals, the second number being less than the first number; and a detecting unit, configured to detect the second set of signals generated by the beamforming unit. Embodiments of the present disclosure may reduce complexity of signal detection and cost of implementation.