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Cognitive Radio Wireless Future

Prepared By : Abdelrahman Fady

Agenda

• Introduction

• SDR Concept

• CR Concept

• CR versus IA

• CR Advantages

• CR Applications

• Q&A

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Many services are requested e.g.

• Mobile Broadband

• M2M

• Large capacity

• Users interventions

All this with

• Limited spectrum

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Introduction

Spectrum importance

Here we will see how Cognitive radio will help in catching this future , Let’s start the journey 4

Introduction

• What is SDR…?

SDR is software defined radio, where single radio might be configured to work on different bands, frequencies or in different technologies and this configuration might be changed as per need.

• in SDR the software able to change

• Security

• Modulation

• Processing

• frequency

• Wave form

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SDR Concept

• SDR advantages

• Simple network architecture

• Easy configuration

• Less complexity

• Easy upgrade

• SDR disadvantages

• Still there is no automation and change need user intervention

• Always needs multi band antenna

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SDR Concept

• SDR applications

• All new Cabinets provided by mobile vendor use this concept

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SDR Concept

• Definition

We can say cognitive radio is the radio that aware of its surroundings and adapts intelligently adapts to new waveform.

The motivator behind this is existence of under utilized spectrums as well congested ones and this is extremely impacting networks performance

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Cognitive Radio(CR)Concept

• Fundamental of CR processes

• Ability to sense the environment

• Evaluate options

• Implement chosen waveform

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Cognitive Radio(CR)Concept

• How does the CR operation works?

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Cognitive Radio(CR)Concept

• Cognitive radio key algorithms

• Sensing Algorithms

• Cross Layer Control solution

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Cognitive Radio(CR)Concept

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Cognitive radio versus smart antennas

Point Cognitive radio (CR) Intelligent antenna (IA)

Principal goal Open spectrum sharing Ambient spatial reuse

Interference processing Avoidance by spectrum sensing Cancellation by spatial pre/post-coding

Key cost Spectrum sensing and multi-band RF

Multiple- or cooperative-antenna arrays

Challenging algorithm Spectrum management tech Intelligent spatial beamforming/coding tech

A smart antenna is an antenna technology that uses spatial beam-formation and spatial coding to cancel interference; however, it requires an intelligent multiple- or cooperative-antenna array. On the other hand, cognitive radio allows user terminals to sense whether a portion of the spectrum is being used to share spectrum with neighbour users.

• Improving spectrum utilization & efficiency

• Improving link reliability

• Less expensive radios

• Advanced network topologies

• Enhancing SDR techniques

• Automated radio resource management.

• Advanced interoperability

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CR Advantages

• Some CR applications

• Extending mobile networks

• Open air events

• Mobile video services

• Military application

• Multi-technology phone

• Emergency radio system

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CR Applications

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Q&A

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