Method for reducing angular blur in radar pictures
First Claim
1. Method for reducing angular blur in radar pictures achieved in range bin based detection systems, a variable S(x,y) such as amplitude, power or the like being measured as a function of an angle x and a distance y or when x and y only assumes discrete values a variable S(i,j) with i1≦
- i≦
i2 and j1≦
i≦
j2, the abbreviated way of writing S(x) or S(i) being used when the distance is implicit or irrelevant, characterized in that in each range bin for a plurality of angular values x an expression of the type;
corrected angular position=angular position+angle correction is determined, and in which “
angle correction”
comprises (partial) derivative(s) of first or higher order S′
(x), S″
(x), . . . of the measured variable S(x) as a function of the angle x and in which the variable measured at the angular position “
angular position”
then is moved to the variable in the angular position “
corrected angular position”
, the moved variable and the variable in “
corrected angular position”
being processed by adding, maximizing or the like.
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Abstract
The invention refers to a method for reducing angular blur in radar pictures achieved in range bin based detection systems. A variable S(x,y) such as amplitude, power or the like is measured as a function of an angle x and a distance y. According to the invention an expression of the type:
corrected angular position=angular position+angle correction is determined in each range bin for a plurality of angular values x, the term “angle correction” comprising derivative(s) of first or higher order of the variable S(x). The variable measured at the angular position “angular position” is the moved to the variable in the angular position “corrected angular position” and the moved variable and the variable in “corrected angular position” are processed by adding, maximizing or the like.
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Citations
7 Claims
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1. Method for reducing angular blur in radar pictures achieved in range bin based detection systems, a variable S(x,y) such as amplitude, power or the like being measured as a function of an angle x and a distance y or when x and y only assumes discrete values a variable S(i,j) with i1≦
- i≦
i2 and j1≦
i≦
j2, the abbreviated way of writing S(x) or S(i) being used when the distance is implicit or irrelevant, characterized in that in each range bin for a plurality of angular values x an expression of the type;
corrected angular position=angular position+angle correctionis determined, and in which “
angle correction”
comprises (partial) derivative(s) of first or higher order S′
(x), S″
(x), . . . of the measured variable S(x) as a function of the angle x and in which the variable measured at the angular position “
angular position”
then is moved to the variable in the angular position “
corrected angular position”
, the moved variable and the variable in “
corrected angular position”
being processed by adding, maximizing or the like.- View Dependent Claims (2, 3, 4, 5, 6, 7)
- i≦
Specification