Accession Number:

AD0263657

Title:

DETECTION OF DOPPLER AND OTHER SIGNALS IN A HOMODYNE PULSE SYSTEM

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s):

Report Date:

1961-08-07

Pagination or Media Count:

1.0

Abstract:

A homodyne pulsed radio altimeter is analyzed. First the instantaneous phase difference between the transmitted and received waves, for both the phase coherent and noncoherent cases, is discussed. The possibility of reconstructing a doppler, andor a frequency modulation induced beat frequency from a series of pulses is then considered, and finally attention is given to the mixer where the effect of low pass filtering on its output is analyzed. An expression defining the percentage of the total received signal that may be converted to a useful output from a given number of available pulses is derived. This expression is a function of the circuit parameters and the time delay between transmission and reception. Graphs of the filtered mixer output and the percentage of the signal recovered as a function of time delay are presented. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE