PDCCH Design for Above 52.6 GHz Systems

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Solution Overview

Problem

Current wireless communication systems, particularly those operating above 52.6 GHz, face challenges in efficiently handling low power amplifier efficiency and large phase noise, which are exacerbated by the need for single-carrier waveforms.

Innovation Solution

The proposed solution involves detailed control resource set (CORESET) configuration and physical downlink control channel (PDCCH) design, including the use of Discrete Fourier Transform (DFT) for frequency domain processing, separate DFT processing for DMRS and PDCCH, and flexible DFT size allocation to optimize resource efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If single-carrier waveform is used for carrier frequency above 52.6 GHz, then power amplifier efficiency is improved and phase noise is reduced, but waveform complexity increases

Engineering Contradiction:

Improvepower amplifier efficiencyVSAvoidwaveform complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent changes the waveform parameter from multi-carrier (OFDM) to single-carrier (DFT-s-OFDM) for frequencies above 52.6 GHz. This parameter change reduces PAPR and phase noise while improving PA efficiency, accepting the trade-off of increased waveform processing complexity through DFT operations.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If DFT-s-OFDM waveform is used above 52.6 GHz, then phase noise is reduced, but processing complexity increases

Engineering Contradiction:

Improvephase noiseVSAvoidprocessing complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent replaces complex phase noise compensation mechanisms with a fundamentally different waveform approach (DFT-s-OFDM) that inherently reduces phase noise. The single-carrier structure eliminates the need for complex phase tracking and compensation algorithms required in multi-carrier systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If separate DFT processing is applied to DMRS and PDCCH, then resource efficiency is improved, but processing time increases

Engineering Contradiction:

Improveresource efficiencyVSAvoidprocessing time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent segments the DFT processing into separate operations for DMRS and PDCCH. This segmentation allows independent optimization of each component's processing parameters and enables more efficient resource allocation, though it does increase the number of processing steps.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12238742B2Control resource set configuration and physical downlink control channel design for above 52.6GHZ

Publication Date: 2025.02.25 INTEL CORP

AI summary

Various embodiments herein provide techniques for control resource set (CORESET) configuration and PDCCH design for system operating above 52.6 GHz carrier frequency. Embodiments provide detailed design for the CORESET structure to support multiple precoders for a PDCCH. The DFT size of control could be different from DFT size of data. Additionally, embodiments provide techniques for channel multiplexing of control and data transmission for system operating above 52.6 GHz carrier frequency. Other embodiments may be described and claimed.