Delta-Sigma UHF Digital Waveform Generator

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  • Delta-Sigma UHF Digital Waveform Generator Book Detail

  • Author :
  • Release Date : 2006
  • Publisher :
  • Genre :
  • Pages : 19
  • ISBN 13 :
  • File Size : 49,49 MB
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Delta-Sigma UHF Digital Waveform Generator by PDF Summary

Book Description: The Naval Research Laboratory (NRL) has developed and built a prototype UHF Digital Waveform Generator (DWG) based on the Delta-Sigma algorithm, which allows arbitrary waveform generation. It provides predicted low phase and spurious noise. Much of the design uses field programmable gate arrays (FPGAs) for single-bit digital waveform generation. Four filter topologies were initially considered, including cascade, hybrid, parallel, and transposed. The cascade and parallel forms were eliminated because they imposed a heavy computational burden on the system. After analyzing the transposed topology, quantization error in higher-order filters led to the selection of the hybrid form of the digital filter because it performed well. A 12th order hybrid filter was selected and implemented using FPGAs. The NRL Development demonstrates that a simple-to-code single-bit Delta-Sigma DWG can cost-effectively provide the same resolution as a 16-bit or greater digital-to-analog converter (DAC) DWG. These results provide the promise of low-cost diverse waveform generation capability in future high-performance Navy radar systems.

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