Area-optimized implementation of quadrature direct digital frequency synthesizers on LUT-based FPGAs

This paper deals with an field-programmable gate array (FPGA)-implementation of quadrature direct digital frequency synthesizers (QDDFS), and, in particular, with those based on CORDIC, interpolation, and memory compression. We provide results of maximum throughput, i.e., 302 MHz, when mapping QDDFS architectures on current look-up-table (LUT)-based field-programmable technology. We take into account those VLSI design guidelines that work well on FPGAs and architectural considerations to design efficient (in terms of area and throughput) QDDFS, up to 56% faster than commercial cores. Finally, we present a design map that combines the phase-toamplitude techniques reviewed in this paper so as to minimize the overall area.