Non-Coherent receivers are attractive for IR-UWB systems and are preferred over its coherent counterpart, because of its implementation simplicity and non-requirement of channel state information (CSI). UWB systems have a low Power Spectral Density (PSD) which limits it from achieving a wide coverage and high data rate despite, providing an adequate system performance. Hence, cooperative diversity technology is introduced which helps in expansion of coverage area, improvement in Quality of Service (QoS) and BER performance. The paper evaluates the BER performance of IR-UWB TR receiver using dual hop cooperative strategy with Amplify and Forward (AF) relaying analytically and compares it with the simulation results. Simulations clearly show that with increase in number of frames from 1 to 2, the BER performance degrades.