Wireless Receiver Equalizer Updates Based on Channel Change Thresholds

Solution Overview

Problem

The high computational cost of computing and updating equalizer coefficients in wireless communications receivers, particularly for MIMO channels with many taps, is a significant challenge due to the frequent need for recalculating coefficients in dynamic wireless environments.

Innovation Solution

An equalization parameter analyzer compares current and previous parameters to determine if a change exceeds a predefined threshold, initiating the generation of new equalizer coefficients only when necessary, thereby reducing unnecessary computations and conserving resources.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If equalizer coefficients are computed frequently to maintain system performance, then reliability is improved, but use of energy increases and productivity decreases

Engineering Contradiction:

Improvesystem performanceVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the equalizer coefficient update frequency based on channel condition changes. Instead of fixed periodic updates, the system monitors parameter changes and triggers updates only when necessary, making the update mechanism adaptive to actual channel conditions rather than operating on a rigid schedule

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the update trigger condition from time-based to parameter-change-based. By monitoring whether channel parameters exceed a threshold change from previous values, the system transforms the update mechanism from periodic to event-driven, reducing unnecessary updates when channel conditions are stable

Inventive Principle:

Principle #35Parameter changes

2Reliability

If equalizer coefficients are computed frequently to maintain system performance, then reliability is improved, but productivity decreases

Engineering Contradiction:

Improvesystem performanceVSAvoidimplementation efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system dynamically adjusts the equalizer coefficient update frequency based on channel condition changes. Instead of fixed periodic updates, the system monitors parameter changes and triggers updates only when necessary, making the update mechanism adaptive to actual channel conditions rather than operating on a rigid schedule

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the update trigger condition from time-based to parameter-change-based. By monitoring whether channel parameters exceed a threshold change from previous values, the system transforms the update mechanism from periodic to event-driven, reducing unnecessary updates when channel conditions are stable

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the number of equalizer coefficients is increased to handle MIMO channels, then adaptability is improved, but device complexity increases

Engineering Contradiction:

ImproveMIMO channel handlingVSAvoidcomputational complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system segments the equalizer coefficient computation into independent per-antenna pairs. Each antenna pair's coefficients are computed and updated independently based on its specific channel conditions, allowing the system to handle MIMO channels with many coefficients while managing complexity through modular, independent processing units

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically determines which coefficient sets need updating based on individual channel parameter changes for each antenna pair. Instead of updating all coefficients simultaneously, only the affected subsets are refreshed, reducing the effective computational complexity while maintaining adaptability to MIMO channel variations

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS8913653B2Efficient equalizer coefficient computation

Publication Date: 2014.12.16 NVIDIA CORP

AI summary

An equalization parameter analyzer includes a parameter section configured to acquire at least one current parameter for a wireless receiver and an analyzer section configured to compare the at least one current parameter with at least one corresponding previous parameter. Additionally, the equalization parameter analyzer also includes a coefficients section configured to initiate a generation of new equalizer coefficients in the wireless receiver based on a change between the at least one current and corresponding previous parameters that exceeds a predefined threshold. A method of equalization coefficients generation is also provided.