Nyquist folding analog-to-information receiver: autonomous information recovery using quadrature mirror filtering

  • Authors:

  • P. E. Pace;A. Kusmanoff;G. L. Fudge

  • Affiliations:

  • Dept. of Electrical and Computer Engineering, Naval Postgraduate School, Monterery, CA;L-3 Communications, Integrated Systems, Greenville, TX;L-3 Communications, Integrated Systems, Greenville, TX

  • Venue:
  • Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
  • Year:
  • 2009

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Abstract

A broadband Nyquist-folding analog-toinformation receiver, allows multiple Nyquist zones to be directly undersampled and subsequently folded into a continuous time analog interpolation filter. This paper presents a new algorithm that autonomously extracts the intercepted pulse parameters on the time-frequency plane using a quadrature mirror filter bank at the output of the interpolation filter. Parameters include a running calculation of the exact bandwidth, frequency, pulse duration and slope. By the examination of the signal's slope we show that a direct computation of the actual Nyquist zone is possible. Monte Carlo simulation runs are presented to demonstrate the robustness of the algorithm for-20≤SNR ≤10 dB.