Instantaneous frequency measurement receiver with bandwidth impr

Details Instantaneous frequency measurement receiver with bandwidth impr Instantaneous frequency measurement receiver with bandwidth impr

1991-03-06

1992-04-28

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

364484, 324 77G, 324 78D, 324 82, G01R 2316

Patent

active

051091887

ABSTRACT:
This is a technique for extending the frequency range which employs a power divider having two outputs, one output being supplied to a first A/D converter, and the other output being supplied via a delay device to a second A/D converter. A processor receives the outputs of the two A/D converters. In operation, the input signal is subjected to a known delay .tau. and both original and delayed signals are sampled simultaneously. Both sampled signals are Fourier transformed and the phase and amplitudes calculated, using the expressions:

REFERENCES:
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patent: 4325068 (1982-04-01), Mercer
patent: 4336541 (1982-06-01), Tsui
patent: 4504785 (1985-03-01), Tucker
patent: 4633516 (1986-12-01), Tsui
patent: 4893266 (1990-01-01), Deem
patent: 4963816 (1990-10-01), Tsui
patent: 4983906 (1991-01-01), Hiller

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