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Abdulrahman Fady, profile picture
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Cognitive radio

Cognitive radio is a type of software-defined radio that can be configured dynamically depending on its surroundings. It aims to improve spectrum utilization by detecting unused spectrum and adapting intelligently. Key aspects include sensing the environment, evaluating options, and implementing the chosen waveform. Cognitive radio allows for open spectrum sharing by avoiding interference through sensing available spectrum, while intelligent antennas focus on spatial reuse through techniques like beamforming and interference cancellation. Some applications of cognitive radio include extending mobile networks coverage, providing connectivity at open-air events, and enabling multi-technology phones.

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0 Cognitive Radio Wireless Future Prepared By : Abdelrahman Fady
Agenda • Introduction • SDR Concept • CR Concept • CR versus IA • CR Advantages • CR Applications • Q&A 2
Many services are requested e.g. • Mobile Broadband • M2M • Large capacity • Users interventions All this with • Limited spectrum 3 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 5 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 6 SDR Concept
• SDR applications • All new Cabinets provided by mobile vendor use this concept 7 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 8 Cognitive Radio(CR)Concept
• Fundamental of CR processes • Ability to sense the environment • Evaluate options • Implement chosen waveform 9 Cognitive Radio(CR)Concept
• How does the CR operation works? 10 Cognitive Radio(CR)Concept
• Cognitive radio key algorithms • Sensing Algorithms • Cross Layer Control solution 11 Cognitive Radio(CR)Concept
12 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 13 CR Advantages
• Some CR applications • Extending mobile networks • Open air events • Mobile video services • Military application • Multi-technology phone • Emergency radio system 14 CR Applications
15 Q&A
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