MCS Index Expansion With LDPC Rates for 60GHz Link Adaptation

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Solution Overview

Problem

Existing wireless communication standards in the 60GHz spectrum, such as IEEE 802.11ad and IEEE 802.11ay, face performance gaps in modulation and coding scheme (MCS) index values, particularly between MCS 9 and 10, and between MCS 12 and 64-QAM code rate 5/8, which affect data throughput and link adaptation.

Innovation Solution

Introduction of new MCS index values based on low-density parity-check (LDPC) code rates, including 7/8 for π/2-QPSK, 13/16 for 16-QAM, and 7/8 for 64-QAM, along with a new LDPC matrix, to enhance data throughput and reduce performance gaps in 60GHz wireless communications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If existing MCS index values are used in 60GHz wireless communication standards, then device complexity is reduced, but data throughput and link adaptation performance exhibit significant gaps

Engineering Contradiction:

Improvedata throughputVSAvoidMCS index value structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by introducing new MCS index values with revised code rates (7/8 for π/2-QPSK, 13/16 for 16-QAM, and 7/8 for 64-QAM) and a new LDPC matrix structure. These parameter modifications eliminate performance gaps between adjacent MCS values while maintaining compatibility with existing wireless communication frameworks, thereby improving data throughput without requiring fundamental system redesign

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by enabling flexible selection among multiple code rates and modulation schemes within the MCS framework. The new MCS index values allow dynamic adaptation to varying channel conditions by selecting optimal combinations of modulation types and code rates, improving link adaptation performance while maintaining system flexibility

Inventive Principle:

Principle #15Dynamics

2Productivity

If channel bonding or MIMO techniques are implemented to increase data throughput, then data rate improves, but device complexity and implementation requirements increase

Engineering Contradiction:

Improvedata rateVSAvoidcommunication techniques

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent achieves improved data rates through parameter changes in the existing single-carrier communication framework. By optimizing code rates and introducing a new LDPC matrix, the system achieves higher throughput without requiring additional spatial streams (MIMO) or frequency bonding, thereby avoiding the increased complexity and implementation requirements associated with those techniques

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3363132B1Modulation and coding scheme codes

Publication Date: 2026.02.18 INTEL CORP

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AI summary

This disclosure describes methods, apparatus, and systems related to a modulation and coding scheme (MCS) system. The device may determine a wireless communications channel with a first device in accordance with a wireless communications standard. The device may generate a header in accordance with a communication standard, the header including, at least in part, a modulation and coding scheme (MCS) index value. The device may determine a code rate associated with the MCS index value based at least in part on the wireless communications channel. The device may cause to send the header to the first device over the wireless communications channel based at least in part on the MCS index value.