• Nita Patil
• Prof. Mrs. J. H. Patil

Abstract – The theoretical analysis gives an overview of the functioning of DDS, especially with respect to noise and spurs. Different spur reduction techniques are studied in detail. Four ICs, which were the circuit implementations of the DDS, were designed. One programmable logic device implementation of the CORDIC based quadrature amplitude modulation (QAM) modulator was designed with a separate D/A converter IC. For the realization of these designs some new building blocks, e.g. a new tunable error feedback structure and a novel and more cost-effective digital power ramp generator, were developed. Implementing a DDS on an FPGA using Xilinx’s ISE software.

Keywords – CORDIC, DDS, NCO, FPGA, SFDR.

"DDS Based on Pipelined CORDIC Algorithm with Communication System ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 7, page no.3126-3131, July-2015, Available :http://www.jetir.org/papers/JETIR1507025.pdf

"DDS Based on Pipelined CORDIC Algorithm with Communication System ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 7, page no. pp3126-3131, July-2015, Available at : http://www.jetir.org/papers/JETIR1507025.pdf