Earticle

초록

영어

In cognitive radio (CR), secondary users (SUs) are able to sense the absence of primary users (PUs) in the spectrum. Then, SUs use this information to opportunistically access the licensed spectrum in the PUs’ absence. In this paper, we present an implementation of real-time video transmission with spectrum-sensing between two points using GNU Radio and a National Instruments 2900 Universal Software Radio Peripheral (USRP). In our project, spectrum-sensing is implemented at both transmitter and receiver. The transmitter senses the channel, and if the channel is free, a video signal (which could be a real-time signal from a video file) will be modulated and processed by GNU Radio and transmitted using a USRP. A USRP receiver also senses the channel, but in contrast, if the channel is busy, the signal is demodulated to reproduce the transmitted video signal. This project brings in several challenges, like spectrum-sensing in the devices’ environment, and packets getting lost or corrupted over the air.

목차

Abstract
 1. Introduction
 2. Theory
 3. Experiments
  3.1 Hardware/Software Overview
  3.2 System Implementation
  3.3 Spectrum Sensing
  3.4 Video Transmission
 4. Results and Discussion
  4.1 Implementation of Video Transmission with H.264 and MP4 on a Specific Channel
  4.2 Implementation of Spectrum Sensing with Video Transmission at Transmitter and Receiver
 5. Conclusion
 Acknowledgment
 References

키워드

저자

• Huynh Thanh Thien [ Department of Electrical and Electronic Engineering, University of Ulsan, Ulsan 680-749, Korea ]
• Hiep Vu-Van [ Department of Electrical and Electronic Engineering, University of Ulsan, Ulsan 680-749, Korea ]
• Insoo Koo [ Department of Electrical and Electronic Engineering, University of Ulsan, Ulsan 680-749, Korea ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Internet, Broadcasting and Communication

• 간기

  계간

• pISSN

  2288-4920

• eISSN

  2288-4939

• 수록기간

  2009~2025

• 십진분류

  KDC 326 DDC 380