Post on 25-Feb-2016
description
SDR: Spectrum ChallengeAdvisors: Prof. J. V. Krogmeier, Prof. D.J. LoveGraduate Mentor: Joon Young KimMembers: Sutton Hathorn, Eric Rice, Muhammet Yazmyradov
Department of Electrical and Computer Engineering
(1)USRP2 Ports(3) USRP Ports
(2) USRP2 Board(4) USRP Board
Goal: Develop a radio protocol that most effectively transmit data through a communication channel in the presence of interfering signals.
• All teams transmit on the same frequency, so the competition tries to find effective ways to transmit data over crowded frequencies.
• Both a competitive and a cooperative competition occur
• Competition is run on the ORBIT test bed
• Teams are judged on the time taken to transmit a series of packets between two radios
• Signal processing and systems. Some experience with communication systems and digital signal processing
• ECE301, ECE438, and ECE 440 are all used in SDR technology
• Good programming skills (Python, C++) and knowledge of Linux
• Software-defined radio (SDR) is a radio communication system where components that have been typically implemented in hardware are instead implemented by means of software on a personal computer or embedded system.
• This allows the radio to be instantly reconfigured via programming.
• One physical radio can be used for a multitude of purposes
DARPA SPECTRUM CHALLENGE
SOFTWARE DEFINED RADIO
GNU RADIO SOFTWARE
DSSS/BPSK PROTOCOLS
TESTING WITH THE USRP
• The Universal Software Radio Peripheral is the hardware platform being used to test and implement the radio protocols developed with the GNU Radio software.
• The USRP B200 has a bandwidth of 56MHz• It has a frequency range of 70MHz to 6GHz
RELEVANT EXPERIENCE
• An open source software development toolkit• Provides programming framework to perform
signal processing for a variety of communication systems
• GNU Radio Companion (GRC) provides a graphical flowchart based development environment
-Direct Sequence spread spectrum is a technique that modulates the information signal and carrier with a spreading signal to use more bandwidth.
-BPSK (Binary phase-shift keying)is a digital modulation technique that changes the phase of a carrier wave to convey information.
-The resulting wider signal is more resistant to acute interference and the channel can be used by multiple users simultaneously