CORDIC based Universal Modulator

In the literature, different architectures have been proposed for FPGA implementation of Universal Modulator. The Look up table (LUT) technique is one way of realizing universal modulator. In this paper, a pipelined CORDIC using 2 stages of Multiplexer is proposed for efficient realization of universal modulator. For the purpose of comparison, this universal modulator is implemented on Spartan 3E FPGA and its performance is compared with that of unrolled CORDIC which uses only shifters and adders and unpipelined Multiplexer based CORDIC. The Universal Modulator is used for realizing Amplitude, Frequency and Phase Modulation. From the implementation, it is found that the pipelined multiplexer based Modulator is 5% more area efficient and 4 % more speed efficient than unrolled CORDIC.