IMPLEMENTATION AND COMPARATIVE STUDY OF A HIGH SPEED MULTIMODE DIGITAL MODULATOR FOR POWER CONSTRAINED DIGITAL COMMUNICATION

摘要

In this paper, the architecture and implementation of a multimode digital modulator has been presented. The digital modulator can perform any one of Amplitude Shift Keying, Frequency Shift Keying, Phase Shift keying or Quadrature Phase Shift Keying modulation, de- pending on the value of the select inputs. The key feature of the work is reduced power and simple circuitry, without compromising throughput. Prototypes based on the proposed architecture have been developed. Analysis of the simulation reports validate correct functionality while synthesis and power reports show that the prototypes have very low power requirement while maintaining high throughput. Appropriate comparisons with other existing implementations, as reported in the literature, have also been included.