1. Advisors: Prof. J. V. Krogmeier, Prof. D.J. Love Graduate Mentor: Joon Young Kim Members: Sutton Hathorn, Eric Rice, MuhammetYazmyradov SDR: Spectrum Challenge Department of Electrical and Computer Engineering Software Defined Radio DARPA Spectrum Challenge DSSS/BPSK Protocols -Direct Sequence spread spectrum is a technique that modulates the information signal and carrier with a spreading signal to use more bandwidth. • 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 Goal: Develop a radio protocol that most effectively transmit data through a communication channel in the presence of interfering signals. • 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 -The resulting wider signal is more resistant to acute interference and the channel can be used by multiple users simultaneously 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 • All teams transmit on the same frequency, so the competition tries to find effective ways to transmit data over crowded frequencies. -BPSK (Binary phase-shift keying) is a digital modulation technique that changes the phase of a carrier wave to convey information. GNU Radio software • 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 Relevant Experience • 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 (1)USRP2 Ports (3) USRP Ports (2) USRP2 Board (4) USRP Board