As the users of wireless devices including wireless home PCs and other devices have increased the bandwidth of the spectrum and the battery life became a challenging subject in the communication of wireless devices to enjoy the increased convenience of wireless connectivity. Ultra-Wide Band (UWB) is a technology which transmits data with high bandwidth, using a very low power spectral density. Because of low power consumption, UWB signals are not harmful to the health of human, and it is a good candidate for communication of devices in wireless personal area networks (WPAN). In this paper, we show that how the UWB technology signal carries the big amount of data using very low power, and also we compared the status of UWB signal during carrying the high amount of data while the data rate is on different scales. In this work, we simulated the transmitter and receiver for UWB communication using the Binary Phase Shift Keying (BPSK) modulation technique which shifts the phase of the signal by 180 degrees. The simulation results are presented and compared.