6.1 Detection of Radio Signals
131
Fig. 6.3 Detection characteristics
Fig. 6.4 Detection
parameter of perfect and
imperfect radar
as R dr . Consequently, to obtain the specified values of probabilities P cd and P f a in
imperfect system, R dr > R d .
Relation R dr and R d > 1 and is called (α ls ) a loss coefficient in radar system
R dr
R d
= α ls .
(6.4)
By this means, loss coefficient shows, by how much times it is necessary to
increase a relation of signal energy to noise at radar input as compared to R d parameter
in order to provide a target detection with specified probabilities of correct detection
P cd and false alarm P f a .
Let us examine simplified structure of a perfect radar at receiving of coherent
signals with the known shape, when there are no various deviations from an optimal
processing unit. Such system can be examined as a sample, by which real radars can
131
Fig. 6.3 Detection characteristics
Fig. 6.4 Detection
parameter of perfect and
imperfect radar
as R dr . Consequently, to obtain the specified values of probabilities P cd and P f a in
imperfect system, R dr > R d .
Relation R dr and R d > 1 and is called (α ls ) a loss coefficient in radar system
R dr
R d
= α ls .
(6.4)
By this means, loss coefficient shows, by how much times it is necessary to
increase a relation of signal energy to noise at radar input as compared to R d parameter
in order to provide a target detection with specified probabilities of correct detection
P cd and false alarm P f a .
Let us examine simplified structure of a perfect radar at receiving of coherent
signals with the known shape, when there are no various deviations from an optimal
processing unit. Such system can be examined as a sample, by which real radars can