Abstract: Multiple communication channel support in Radio Frequency (RF) transmission, such as that in a Software Defined Radio (SDR) warrants the use of channelizers to extract required channels from the received RF frequency band and to perform follow-on baseband processing. The objective of our project is to Design a SDR using Xilinx system generator and describe the process of channelization as it applies to low power and high-efficiency applications in wireless and Satellite Communications (SATCOM) domains. Smaller bandwidths and changing requirements of bandwidth calls for a programmable channel selection mechanism whereby channels and the resulting bandwidth can be selected based on target application, which is the primary principle in the Software Defined Radio based systems[3]. SDR is a radio in which some or the entire physical layer functions are software defined. Traditional hardware based radio devices have limited cross-functionality and they are modified only through a physical intervention. This results in higher production costs and minimal flexibility in supporting multiple waveform standards this problem is solved by SDR’s. In this project, a software defined radio is designed using Xilinx System Generator. System Generator’s FIR, FFT, FIFO and FDA Tool blocks are used. The FDA Tool block is used to define the filter order and coefficients, and the SDR block is used for the MATLAB/Simulink simulation and design implementation in FPGA using Xilinx ISE Design Suite 14.1.