Coherent Square Wave Demodulation of Ideal Limiter Output |
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Authors: | Horowitz LL |
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Institution: | Lincoln Laboratory Massachusetts, Institute of Technology, Lexington, MA 02173; |
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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. |
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