Abstract. The operations of the method
of passive one-position angular-difference-Doppler location providing a
measurement of the coordinates and trajectories of the motion of radio-emitting
objects equipped with radio transmitting devices of modulated signals with phase,
frequency-phase and/or quadrature amplitude modulation of various multiplicity
are justified for the case of their uniform, rectilinear displacement on a
constant height. First, the values of the heading
angles of the direction of motion of objects are determined on the base of
measurements at equidistant
intervals of time of the angular coordinates and the reconstructed carrier
frequency of the modulated signals. Then, the magnitude of the velocity vector of the object,
the path traversed in a fixed
time and åđó
location of objects as points
of intersection of position lines - rays drawn from the origin to the
corresponding azimuth angles and a circle passing through the origin of
coordinates, the chord of which is the above-mentioned segment of the path,
are
calculated using the dependence of the
magnitude of the Doppler carrier frequency increment on the direction of motion. In the
following sections, in accordance
with the operations of the inverse-kinematic angular-difference-Doppler method,
the structure of a passive single-position radar station including two groups
of devices is synthesized:
- observation channels with
devices for primary processing;
- multiprocessor secondary
processing device.
Also, an estimation of the
accuracy characteristics of the system was made, which confirmed the
possibility of its use for measuring the range, speed and direction of movement
of objects.
Key words: passive one-position
angular-difference-Doppler location, radar system, radio-emitting object.
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