Doppler-Time Intensity Scope
Libraries:
Phased Array System Toolbox /
Sinks
Description
The Doppler-Time Intensity Scope block creates a scrolling display of
Doppler response intensities as a function of time. The input consists of Doppler responses
for a pulse or FMCW signal. Each frame of data creates a new line on the scope. The scope
serves only as a display of the Doppler response. Using the response as input corresponds to
setting the IQDataInput
property of the phased.DTIScope
System object™ to false
.
Examples
Simulate and Visualize Range and Doppler Intensity Data in an End-to-End Radar System
Model an end-to-end radar system and use the scopes to visualize range-intensity and Doppler-intensity data in Simulink.
Ports
Input
X — Input data
real-valued length-M vector
Input data, specified as a real-valued length-M vector of Doppler responses. Each vector corresponds to a line of data. The block accepts single precision data type input, but converts the data to double precision for display.
Data Types: double
| single
Parameters
Doppler Output — Doppler output domain
'Frequency'
(default) | 'Speed'
Doppler output domain, specified as 'Frequency'
or
'Speed'
. If you set this property to
'Frequency'
, the Doppler domain is Doppler shift. Units are in Hz. If
you set this property to 'Speed'
', the Doppler domain is radial
speed. Units are in m/s.
Programmatic Use
Block
Parameter:DopplerOutput |
Type:character vector |
Values:'Frequency' |
'Speed' |
Default:'Frequency' |
Data Types: string
Propagation Speed (m/s) — Signal propagation speed
physconst("LightSpeed")
(default) | positive scalar
Signal propagation speed, specified as a positive scalar. To obtain the speed of
light in SI units, use physconst
. Units are in
meters/second.
Example: 3e8
Programmatic Use
Block
Parameter:PropagationSpeed |
Type:double |
Values:positive scalar |
Default:physconst("LightSpeed") |
Data Types: double
Doppler Offset (Hz) — Doppler axis offset
0.0
(default) | scalar
Doppler axis offset, specified as a scalar. This property applies a frequency offset to the Doppler axis. Units are in Hz.
Programmatic Use
Block
Parameter:DopplerOffset |
Type:double |
Values:scalar |
Default:0 |
Data Types: double
Time Span (s) — Time span of display
0.100
(default) | positive scalar
Time span of the intensity display, specified as a positive scalar. Units are in seconds.
Programmatic Use
Block
Parameter:TimeSpan |
Type:double |
Values:scalar |
Default:0.1 |
Data Types: double
Operating Frequency (Hz) — Operating frequency
300e6
(default) | positive scalar
Operating frequency, specified as a positive scalar. Units are in Hz.
Programmatic Use
Block
Parameter:OperatingFrequency |
Type:double |
Values:scalar |
Default:300000000 |
Data Types: double
Doppler Resolution (Hz) — Doppler interval between samples
1.0
(default) | positive scalar
Doppler interval between samples, specified as a positive scalar. This property defines the Doppler frequency difference between the scope columns. Units are in Hz.
Programmatic Use
Block
Parameter:DopplerResolution |
Type:double |
Values:positive scalar |
Default:1 |
Data Types: double
Time Resolution (s) — Time difference between rows
0.001
(default) | positive scalar
Time interval between samples, specified as a positive scalar. This property defines the time duration between rows of scope. Units are in seconds.
Programmatic Use
Block
Parameter:TimeResolution |
Type:double |
Values:positive scalar |
Default:0.001 |
Data Types: double
Show Grid — Show Cartesian grid overlay
on (default) | off
Show Cartesian grid overlay. To show the grid, select the check box.
Programmatic Use
Block
Parameter:ShowGrid |
Type:logical |
Values:1 | 0 |
Default:1 |
Show Ticks — Show tick value labels
on (default) | off
Show value labels on tick marks. The display the labels on, select the check box.
Programmatic Use
Block
Parameter:ShowTicks |
Type:logical |
Values:1 | 0 |
Default:1 |
Time Label — Time axis label
'Time (s)'
(default) | string
Time-axis label, specified as a string.
Tunable: Yes
Programmatic Use
Block
Parameter:TimeLabel |
Type:string |
Values:string |
Default:'Time History
(s)' |
Data Types: string
Colorbar Label — Color bar label
'dB'
(default) | string
Color bar label, specified as a string.
Tunable: Yes
Programmatic Use
Block
Parameter:ColorBarLabel |
Type:string |
Values:string |
Default:'dB' |
Data Types: string
Title — Window title
'Doppler vs. Time'
(default) | string
Window title, specified as a string.
Tunable: Yes
Programmatic Use
Block
Parameter:Title |
Type:string |
Values:string |
Default:'Doppler vs.
Time' |
Data Types: char
Block Characteristics
Data Types |
|
Direct Feedthrough |
|
Multidimensional Signals |
|
Variable-Size Signals |
|
Zero-Crossing Detection |
|
Algorithms
This section shows how to run the scope, configure the settings to show labels for the various features and use the cursor to examine data.
Run the Scope
After selecting and opening the block, the scope displays a single tab PLOT. Opening this tab shows all the controls available for the block. The Settings menu displays all the settable parameters for the scope. The Step Back, Run, Step Forward, and Stop buttons control the simulation. The Data Cursors button lets you examine data values on the display.
Scope Parameter Settings
Selecting the Settings menu from PLOT panel scope opens the parameter window with the DATA AND AXES and LABELS panels.
DATA AND AXES
Doppler Output – Use this field to choose
Frequency
for the Doppler shift orSpeed
for the radial speed.Operating Frequency (Hz) - Use this field to set the scaling on the x-axis.
Doppler Offset (Hz) - Use this field to set the frequency offset of the x-axis.
Doppler Resolution (Hz) - Use this field to set the granularity of the x-axis.
Time Span (s) - Use this field to set the duration of the y-axis.
Time Resolution (s) - Use this field to set the granularity of the y-axis.
Labels
Time Label – Use this field to set the y-axis label.
Title – Use this field to set the display title.
Colorbar Label – Set this field to set the color bar label.
Using Cursors
Select the Cursors Button to display the screen cursors. Each cursor consists of intersecting horizontal and vertical cursors that define a point on the display. Positioning two cursors on the display shows the difference between the intensities at the two cursor points.
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.
This block can be used for simulation visibility in systems that generate code but is not included in the generated code.
Version History
Introduced in R2022a
MATLAB 명령
다음 MATLAB 명령에 해당하는 링크를 클릭했습니다.
명령을 실행하려면 MATLAB 명령 창에 입력하십시오. 웹 브라우저는 MATLAB 명령을 지원하지 않습니다.
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