Multiple demodulation frequency Doppler

Details Multiple demodulation frequency Doppler Multiple demodulation frequency Doppler

1984-04-19

1985-08-13

Howell, Kyle L.

Surgery

Truss

Pad

7386125, A61B 1000

Patent

active

045343578

ABSTRACT:
The device uses two Doppler receivers having different center frequencies. After the mean Doppler frequency of each receiver is determined, one of the mean Doppler frequencies is subtracted from the other one of the mean Doppler frequencies, thereby providing the mean Doppler frequency associated with a frequency which is equal to the difference between the two original frequencies. As this difference frequency is much lower than either of the two original frequencies, the resulting difference mean Doppler frequency will not be aliased

REFERENCES:
patent: 3302161 (1967-01-01), Ellison
patent: 3987673 (1976-10-01), Hansen
patent: 4453165 (1984-06-01), Maine

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