Cognitive Radios (CR) are wireless transceivers that have the intelligence to sense the medium and detect whether a channel is occupied or free. If occupied, the CR modifies its own parameters and moves to a free channel. This feature of Cognitive Radio helps to efficiently use available frequencies of the Spectrum thereby efficiently utilizing the spectrum. An extensively used platform for conducting research in this field is the Wireless Open-Access Research Platform (WARP) developed by RICE university. This report introduces the WARP framework for cognitive radio networks, documents the attempt to implement Channel sensing and spectrum sensing using WARP and presents the results obtained during the experiments.