Abstract: In cognitive radio network, dynamic spectrum access is considered as the base which allows unlicensed secondary user (SUs) to access licensed spectrum allotted to licensed primary users (PUs). SUs identify the idle band and access them without interfering in primary users (PUs). For peer-to-peer based communication in dynamic in dynamic spectrum access. SU transmitter and SU receiver should use same channel to communicate. In case of jamming attacks and wideband regime fixed common control channel are not viable. When SU transmitter and SU receiver identify idle channels, they use best channels, they use best channel to communicate [1]. SDR (Software defined radio) or CR (cognitive radio) courses are offered in many universities but due to insufficient hardware available for experimentation [2], these are mainly restricted to theoretical studies. In order to implement these system for validation an expensive set of equipments are necessary. Also the signal is virtually processed and recorded for later time. These issues were resolved by a new technology that provided real time signaling. The universal software radio peripheral (USRP) based system we are describing addresses all of the previously mentioned problems. Specifically, a. USRP systems are affordable than original hardware [3]. b. Real time signaling is achieved by connecting hardware with windows support device and then operating it with software support system i.e. LabVIEW[4]. c. USRP systems are easier to learn, install and configure in a hardware compatible device [5].

Keywords: Universal software radio peripherals (USRPs), LabVIEW, Real Time Signalling