sarprfbounds

Upper and lower bound on PRF for SAR

Since R2021a

Syntax

[prfmin,prfmax] = sarprfbounds(v,azres,swlen,grazang)

[prfmin,prfmax] = sarprfbounds(v,azres,swlen,grazang,Name,Value)

Description

[prfmin,prfmax] = sarprfbounds(v,azres,swlen,grazang) returns the lower bound and the upper bound on the pulse repetition frequency (PRF) of a SAR system based on eclipsing constraints.

[prfmin,prfmax] = sarprfbounds(v,azres,swlen,grazang,Name,Value) specifies additional options using name-value arguments.

Examples

PRF Constraint

Estimate the lower and upper PRF bounds due to eclipsing of a side-looking airborne SAR operating in broadside. The sensor has a velocity of 100 m/s. The transmitted waveform has a pulse width of 100 microseconds. The radar is grazing at an angle of ${30}^{\circ }$ with an image azimuth resolution of 1.5 m and a swath length of 100 m.

v = 100;
pw = 100e-6;
grazang = 30;
azres = 1.5;
swl = 100;

Compute the PRF constraints.

[prfmin,prfmax] = sarprfbounds(v,azres,swl,grazang,'PulseWidth',pw)

prfmin = 
66.6667

prfmax = 
9.9426e+03

Input Arguments

v — Sensor velocity

positive real scalar | vector

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

Data Types: double

azres — Image azimuth or cross-range resolution

positive real scalar | vector

Image azimuth or cross-range resolution in meters, specified as a positive real scalar or a vector.

Data Types: double

swlen — Swath length

positive scalar | vector

Swath length in meters, specified as a positive scalar or a vector.

Data Types: double

grazang — Grazing angle

scalar in the range [0, 90]

Grazing angle in degrees, specified as a scalar in the range [0, 90].

Data Types: double

Name-Value Arguments

Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Before R2021a, use commas to separate each name and value, and enclose Name in quotes.

Example: 'ConeAngle',60,'PulseWidth',2e-6

ConeAngle — 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

PulseWidth — Pulse width

1e-6 (default) | positive real scalar

Pulse width in seconds, specified as a positive real scalar

Data Types: double

Output Arguments

prfmin — PRF lower bound

matrix

PRF lower bound in hertz, returned as a matrix. The rows of prfmin correspond to the velocity values in v. The columns of prfmin correspond to the resolution values in azres

prfmax — PRF upper bound

vector

PRF upper bound in hertz, returned as a vector of the same size as swlen.

Extended Capabilities

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

Version History

Introduced in R2021a