sarscenedopbw

Doppler bandwidth of full scene after azimuth dechirping

Syntax

bwdch = sarscenedopbw(r,lambda,v,wa)

bwdch = sarscenedopbw(r,lambda,v,wa,dcang)

Description

bwdch = sarscenedopbw(r,lambda,v,wa) returns the Doppler bandwidth of the full scene after azimuth dechirping, corresponding to the composite signal received from all resolution cells within the scene.

bwdch = sarscenedopbw(r,lambda,v,wa,dcang) specifies the Doppler cone angle that identifies the direction towards the scene relative to the direction of motion of the array.

Examples

Doppler Bandwidth of Full Scene

A side-looking airborne synthetic aperture radar (SAR) operates in broadside at a wavelength of 0.03 m with a sensor velocity of 100 m/s. The sensor illuminates a scatterer with a Doppler cone angle of ${90}^{\circ }$ at a range of 10 km. The azimuth size of the scene is 916 m. Compute the Doppler bandwidth of the full scene after azimuth dechirping.

lambda = 0.03;
R = 10e3;
v = 100;
Wa = 916;

Compute the Doppler bandwidth.

bwdechirp = sarscenedopbw(R,lambda,v,Wa)

bwdechirp = 
610.6667

Input Arguments

r — Range from target to antenna

positive real scalar | vector

Range from target to antenna in meters, specified as a positive real scalar or a vector.

Data Types: double

lambda — Radar wavelength

positive real scalar | vector

Radar wavelength in meters, specified as a positive real scalar or a vector.

Data Types: double

v — Sensor velocity

positive real scalar

Sensor velocity in meters per second, specified as a positive real scalar.

Data Types: double

wa — Azimuth size of scene

positive real scalar

Azimuth size of scene in degrees, specified as a positive real scalar.

Data Types: double

dcang — Doppler cone angle

90 (default) | scalar in the range [0, 180]

Doppler cone angle in degrees, specified as a scalar in the range [0, 180]. This argument identifies the direction toward the scene relative to the direction of motion of the array.

Data Types: double

Output Arguments

bwdch — Doppler bandwidth of full scene

matrix

Doppler bandwidth of full scene after azimuth dechirping in hertz, returned as a matrix. The rows of bwdch correspond to the range values in r. The columns of bwdch correspond to the wavelength values in lambda.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.

Version History

Introduced in R2021a