Enhanced MIMO Preamble Frame for Interference Reduction

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Solution Overview

Problem

Current wireless communication systems face challenges in minimizing interference between multiple input multiple output (MIMO) streams in directional multi-gigabit networks, particularly in next generation 60 GHz networks, which affects data transmission rates and compatibility with legacy systems.

Innovation Solution

The enhanced MIMO preamble frame format incorporates a circular time shift and selective antenna transmission to minimize interference between streams, allowing for efficient transmission of legacy and EDMG-Header-A using SISO SC PHY modulation, while maintaining backward compatibility and optimizing beamforming settings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multiple MIMO streams are transmitted simultaneously in directional multi-gigabit networks, then data transmission rates are improved, but interference between streams increases

Engineering Contradiction:

Improvedata transmission ratesVSAvoidinterference between streams

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the MIMO transmission into multiple independent streams, each with its own preamble frame structure. By dividing the transmission into separate streams that can be independently processed and synchronized, the system achieves high data rates while managing interference through structured separation of signal components.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary actions by implementing specific preamble frame structures and synchronization mechanisms before actual data transmission. The L-STF and L-CEF fields are prepared in advance with known structures, allowing receivers to pre-calibrate and minimize interference effects before the main data payload is transmitted.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If enhanced MIMO preamble frame format is implemented, then compatibility with legacy systems is improved, but device complexity increases

Engineering Contradiction:

Improvecompatibility with legacy systemsVSAvoidpreamble frame structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a universal preamble frame structure that serves multiple functions: it supports both legacy DMG systems and enhanced EDMG MIMO systems. The same L-STF and L-CEF fields are used across different system types, allowing a single frame format to maintain backward compatibility while enabling advanced features through optional fields and parameters.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The enhanced MIMO preamble frame structure embeds legacy-compatible elements within an extended framework. The traditional L-STF and L-CEF fields are nested within the new frame structure, with additional EDMG-specific fields added around them. This nesting allows legacy devices to process the core fields while advanced devices can utilize the complete structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS10587442B2Enhanced multiple input multiple output preamble frame

Publication Date: 2020.03.10 INTEL CORP

AI summary

This disclosure describes systems, methods, and devices related to an enhanced multiple input multiple output (MIMO) preamble frame. A device may determine a MIMO frame including a first section and a second section. The device may generate an enhanced MIMO frame including at least in part a modified first section and the second section of the MIMO frame. The device may determine a first stream and a second stream associated with at least one antenna of the device. The device may cause to send the enhanced MIMO frame to one or more first devices on the first stream. The device may cause to send the MIMO frame to the one or more first devices on the second stream.