Analysis of Key Performance Parameters of Phase Sampling Digital RF Memories

Abstract

This report explores several performance features of phase sampling digital RF memories, starting with the phase sampling process itself. Spurious signal levels, bandwidth, and processing of simultaneous signals are analyzed using computer modeling of DRFM functions. The preferred phase sampling technique is to make phase comparisons between samples of the input signal and its 180 deg analog. The input amplifier and the noise immunity of the phase comparator determine the dynamic range. Theoretical spurious levels are tabulated for 2-, 4-, 8-, and 16-state sampling. The data reveal no differences between two-state and four-state sampling. Other tables show output levels for simultaneous signals into eight-state and two-state DRFMS at different combinations of input amplitudes. The advantages of the phase DFRM are large bandwidth, large input signal dynamic range without automatic gain control, and the capability for direct output phase modulation.

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Document Details

Document Type
Technical Report
Publication Date
Jan 21, 1994
Accession Number
ADA276019

Entities

People

  • Mark D. Virden

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplifiers
  • Amplitude
  • Automatic Gain Control
  • Bandwidth
  • Carrier Frequencies
  • Comparators
  • Dynamic Range
  • Electronic Countermeasures
  • Electronic Warfare
  • Frequency
  • Frequency Bands
  • Local Oscillators
  • Microwaves
  • Military Research
  • Modulation
  • Phase Modulation
  • Waveforms

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Radar Systems Engineering.
  • Radio communications and signal processing.