Multichannel heterodyning for wideband interferometry, correlati

Details Multichannel heterodyning for wideband interferometry, correlati Multichannel heterodyning for wideband interferometry, correlati

1998-02-05

1999-08-24

Kim, Robert H.

Optics: measuring and testing

By particle light scattering

With photocell detection

356345, G01B 902

Patent

active

059431326

ABSTRACT:
A method of signal processing a high bandwidth signal by coherently subdividing it into many narrow bandwidth channels which are individually processed at lower frequencies in a parallel manner. Autocorrelation and correlations can be performed using reference frequencies which may drift slowly with time, reducing cost of device. Coordinated adjustment of channel phases alters temporal and spectral behavior of net signal process more precisely than a channel used individually. This is a method of implementing precision long coherent delays, interferometers, and filters for high bandwidth optical or microwave signals using low bandwidth electronics. High bandwidth signals can be recorded, mathematically manipulated, and synthesized.

REFERENCES:
patent: 5642194 (1997-06-01), Erskine

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