Title :
Coherent Square Wave Demodulation of Ideal Limiter Output
Author :
Horowitz, Larry L.
Author_Institution :
Lincoln Laboratory Massachusetts, Institute of Technology, Lexington, MA 02173
fDate :
7/1/1977 12:00:00 AM
Abstract :
An ideal limiter may be used to single-bit quantize a noisy sinusoidal signal. This digitization is particularly economical if the signal is to be recorded. lt might then be desired to obtain phase coherence with the limited input signal. A single-bit digital phase-locked loop. utilizing a square wave reference, could be used for this purpose. The effects of coherent square wave demodulation on the signal-to-noise ratio and the (signal-to-noise spectral density) ratio are discussed. The latter result is directly applicable to the performance of the digital phase-locked loop.
Keywords :
Band pass filters; Bandwidth; Coherence; Demodulation; Frequency; Hydrogen; Noise figure; Phase locked loops; Signal to noise ratio; Transfer functions;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.1977.308477