Analog to digital converter requirements and implementations for narrowband channelization applications
David B. Chester, D.H. Damerow, C. Olmstead · 1992
The processing speeds and dynamic ranges of digital narrowband channelizing devices such as fast Fourier transforms (FFTs) and digital downconverters are far ahead of current analog-to-digital (A/D) converter technology. This would seem to limit the usefulness of these digital devices in real-time applications. Analog preprocessing combined with the digital postprocessing can reduce the limitations of A/D converters in these applications. A detailed examination of A/D converter requirements and limitations in these applications is presented. Preprocessing and postprocessing methods which enhance the performance of the A/D converters are presented. These methods can reduce the impact of the A/D converter as a system bottleneck. Communication system applications are emphasized.>