Graduate Profiles 2012 - National University of Science and ...

DDC/DUC HARDWARE IMPLEMENTATION FOR SDRSA Software Defined Radio (SDR) has three parts namely RF section, IF section andBaseband section. The project deals with the IF section. Digital down convertor (DDC)and Digital up convertor (DUC) are extensively used in the radio systems. They aremore popular than their analogue counterparts because of small size, low powerconsumption and accurate performance. We have chosen Field-Programmable GateArray (FPGA) for implementation of design because of their real time and high speedprocessing.The implementation of DDC and DUC was previously done on ASICs (ApplicationSpecific ICs). An ASIC is an integrated circuit (IC) customized for a particular use,rather than intended for general-purpose use FPGA are the modern-day technology forbuilding a breadboard or prototype from standard parts. Programmable logic blocks andprogrammable interconnects allow the same FPGA to be used in many differentapplications. For smaller designs and lower production volumes, FPGAs may be morecost effective than an ASIC design even in production.The DDC converts the signal at the output of analog to digital convertor (ADC), centeredat the intermediate frequency (IF), to complex baseband signal. In addition, DDC alsodecimates the baseband signal without affecting its spectral characteristics. Thedecimated signal, with a lower data rate, is easier to process on a low speed DSPprocessor. Similarly, the DUC converts a baseband signal to a passband IF signal.The developed prototype has been tested on software by simulating it on the SystemGenerator of ‗Xilinx ISE design suite 12.3‘ and the results were in accordance with thetheoretically calculated ones. The developed code was synthesized using the Xilinxenvironment. Synthesized code was tested successfully on FPGA board using‗Hardware Co-Simulation‘. Aim is to implement it on standalone hardware forcommercial purpose.Syndicate Members: Syed Jawad MohsinAbdul WahabMuhammad Bilal SultanHussain Imtiaz KhanSupervisor:Dr Adnan Rashdi5