Physical Layer Frame Format for SC and MC Coexistence

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Solution Overview

Problem

Wideband wireless communication systems face challenges in coexistence between single carrier (SC) and multiple carrier (MC) devices due to differences in hardware complexity, power efficiency, and modulation schemes, leading to compatibility issues and increased complexity in transmitters and receivers.

Innovation Solution

Implementing a common preamble/header frame format at the physical layer that all devices can understand, allowing for dual-mode operation and reducing hardware complexity by using a single carrier sense, synchronization, and channel estimation mechanism, enabling seamless communication between SC-Only, MC-Only, and dual-mode devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If high data rate wireless communication is achieved using wide bandwidths, then data rate is improved, but delay spread increases

Engineering Contradiction:
Improvedata rateVSAvoiddelay spread
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the communication system into single carrier mode and multiple carrier mode, allowing the receiver to process signals differently based on the detected mode. This segmentation enables handling of high data rates through multiple carriers while managing delay spread through single carrier processing when appropriate, thus resolving the contradiction between data rate improvement and delay spread complexity.

Inventive Principle:
Principle #1Segmentation

2Productivity

If multiple carrier modulation is used to achieve high data rates, then data rate is improved, but hardware complexity increases

Engineering Contradiction:
Improvedata rateVSAvoidhardware complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic mode detection and switching capability, where the receiver can detect whether the incoming signal uses single carrier or multiple carrier modulation and adjust its processing accordingly. This dynamic approach allows the system to use multiple carrier modulation for high data rates when needed, while falling back to simpler single carrier processing for lower data rate scenarios, thus managing hardware complexity while maintaining high productivity capability.

Inventive Principle:
Principle #15Dynamics

3Device complexity

If single carrier modulation is used, then hardware complexity is reduced, but data rate is limited

Engineering Contradiction:
Improvehardware complexityVSAvoiddata rate
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The patent creates a universal receiver design that can handle both single carrier and multiple carrier modulation schemes through a common detection and processing architecture. The receiver universally supports both modes by detecting the signal type and applying appropriate processing, allowing the system to achieve low hardware complexity through single carrier operation when sufficient while maintaining the capability for high data rates through multiple carrier operation when needed.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Ease of manufacture

If different modulation schemes are used for single carrier and multiple carrier devices, then device-specific optimization is improved, but coexistence and compatibility worsen

Engineering Contradiction:
Improvedevice-specific optimizationVSAvoidcoexistence and compatibility
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent introduces an intermediary detection mechanism that identifies whether the incoming signal uses single carrier or multiple carrier modulation before processing. This intermediary detection layer acts as a mediator between different modulation schemes, allowing devices optimized for specific modes to coexist harmoniously by enabling receiving devices to automatically adapt to the transmitted mode through detection, thus maintaining both device-specific optimization and universal compatibility.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS8902798B2Physical layer frame format design for wideband wireless communications systems
Publication Date: 2014.12.02 MARVELL ASIA PTE LTD
  • US8902798B2 patent drawing
  • US8902798B2 patent drawing
  • US8902798B2 patent drawing

AI summary

Systems and methods are provided for processing a payload portion of a received signal in a single carrier mode or a multiple carrier mode based on a portion of the received signal. A single carrier signaling portion is received at a first rate, and whether the payload portion of the signal is a single carrier signal or a multiple carrier signal is detected from the received single carrier signaling portion. The payload portion of the received signal is received at the first rate and demodulated in a single carrier mode if the detecting determines that the payload portion of the received signal is a single carrier signal, and the payload portion of the received signal is demodulated in a multiple carrier mode if the detecting determines that the payload portion of the received signal is a multiple carrier signal.