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plotResponse

System object: phased.AngleDopplerResponse
Package: phased

Plot angle-Doppler response

Syntax

plotResponse(H,X)
plotResponse(H,X,ELANG)
plotResponse(H,X,PRF)
plotResponse(___,Name,Value)
hPlot = plotResponse(___)

Description

plotResponse(H,X) plots the angle-Doppler response of the data in X in decibels. This syntax is available when the ElevationAngleSource property is 'Property'.

The size of the first dimension of the input matrix can vary to simulate a changing signal length. A size change can occur, for example, in the case of a pulse waveform with variable pulse repetition frequency.

plotResponse(H,X,ELANG) plots the angle-Doppler response calculated using the specified elevation angle ELANG. This syntax is available when the ElevationAngleSource property is 'Input port'.

plotResponse(H,X,PRF) plots the angle-Doppler response calculated using the specified pulse repetition frequency PRF. This syntax is available when the PRFSource property is 'Input port'.

plotResponse(___,Name,Value) plots the angle-Doppler response with additional options specified by one or more Name,Value pair arguments.

hPlot = plotResponse(___) returns the handle of the image in the figure window, using any of the input arguments in the previous syntaxes.

Input Arguments

H

Angle-Doppler response object.

X

Input data.

ELANG

Elevation angle in degrees.

Default: Value of Elevation property of H

PRF

Pulse repetition frequency specified as a positive scalar. To enable this argument, set the PRFSource property to 'Input port'. Units are in Hertz.

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.

NormalizeDoppler

Set this value to true to normalize the Doppler frequency. Set this value to false to plot the angle-Doppler response without normalizing the Doppler frequency.

Default: false

Unit

The unit of the plot. Valid values are 'db', 'mag', and 'pow'.

Default: 'db'

Examples

expand all

Plot the angle-Doppler response of the 190th cell of a collected data cube.

load STAPExampleData;
x = shiftdim(STAPEx_ReceivePulse(190,:,:));
hadresp = phased.AngleDopplerResponse(...
    'SensorArray',STAPEx_HArray,...
    'OperatingFrequency',STAPEx_OperatingFrequency,...
    'PropagationSpeed',STAPEx_PropagationSpeed,...
    'PRF',STAPEx_PRF);
plotResponse(hadresp,x,'NormalizeDoppler',true);

Figure contains an axes object. The axes object with title Angle-Doppler Response Pattern contains an object of type image.