Receiver Preamp
Receiver preamplifier
Libraries:
Phased Array System Toolbox /
Transmitters and Receivers
Description
The Receiver Preamp block implements a receiver preamplifier that amplifies an input signal and adds thermal noise. In addition, you can add phase noise using an input port.
Ports
Input
X — Input signal
complex-valued matrix
Input signal, specified as a complex-valued matrix.
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.
Data Types: double
TR — Enable enabling signal
logical-valued scalar | scalar
Enable enabling signal, specified as a column vector whose length
equals the number of rows in the input signal X
.
Every element of TR
that equals
0
or false
indicates that the
receiver is turned off, and no input signal passes through the receiver.
Every element of TR
that is nonzero or
true
indicates that the receiver is turned on,
and the input signal passes through.
Dependencies
To enable this port, select the Enable enabling signal input check box.
Data Types: double
| Boolean
Ph — Input phase noise
scalar
Phase noise for each input sample of X
, specified
as a column vector whose length equals the number of rows in
X
.
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.
Dependencies
To enable this port, select the Enable phase noise input check box.
Data Types: double
Output
Out 1 — Output
complex-valued matrix
Output signal, returned as a complex-valued matrix.
Data Types: double
Parameters
Gain (dB) — Gain of receiver
20
(default)
Specify a scalar containing the gain in dB of the receiver preamplifier.
Loss factor (dB) — Loss factor of receiver
0
(default)
Specify a scalar containing the loss factor in dB of the receiver preamplifier.
Noise specification method — Noise specification method
Noise temperature
(default) | Noise power
Specify the receiver noise as Noise power
or
Noise temperature
.
Noise power (W) — Noise power
0
(default)
Specify a scalar containing the noise power in watts at the receiver preamplifier. If the receiver has multiple channels or sensors, the noise bandwidth applies to each channel or sensor.
Dependencies
This parameter appears only when you set Noise specification
method to Noise power
.
Noise figure (dB) — Noise figure of receiver
0
(default)
Specify a scalar containing the noise figure of the receiver preamplifier.
Units are in dB. If the receiver has multiple channels or sensors, the noise
figure applies to each channel or sensor. This parameter appears only when
you set Noise specification method to
Noise temperature
.
Dependencies
This parameter appears only when you set Noise specification
method to Noise
temperature
.
Reference temperature (K) — Reference temperature of receiver
290
(default)
A scalar containing the reference temperature in degrees kelvin of the receiver preamplifier. If the receiver has multiple channels or sensors, the reference temperature applies to each channel or sensor.
Dependencies
This parameter appears only when you set Noise specification
method to Noise
temperature
.
Inherit sample rate — Inherit sample rate
on (default) | off
Select this check box to inherit the sample rate from upstream blocks. Otherwise, specify the sample rate using the Sample rate parameter.
Dependencies
This parameter appears only when you set Noise specification
method to Noise
temperature
.
Sample rate (Hz) — Sampling rate of signal
1e6
(default) | positive real-valued scalar
Specify the signal sampling rate as a positive scalar. Units are in Hz.
Dependencies
To enable this parameter, clear the Inherit sample rate check box.
Data Types: double
Enable enabling signal input — Add input to specify enabling signal
off (default) | on
Select this check box to allow input of the receiver-enabling signal via
the input port TR
. T
Dependencies
This parameter appears only when you set Noise specification
method to Noise
temperature
.
Enable phase noise input — Add input to specify phase noise
off (default) | on
Select this check box to allow input of phase noise for each incoming
sample using the input port Ph
. You can use this
information to emulate coherent-on-receive systems.
Dependencies
This parameter appears only when you set Noise specification
method to Noise
temperature
.
Simulate using — Block simulation method
Interpreted Execution
(default) | Code Generation
Block simulation, specified as Interpreted Execution
or
Code Generation
. If you want your block to use the
MATLAB® interpreter, choose Interpreted Execution
. If
you want your block to run as compiled code, choose Code
Generation
. Compiled code requires time to compile but usually runs
faster.
Interpreted execution is useful when you are developing and tuning a model. The block
runs the underlying System object™ in MATLAB. You can change and execute your model quickly. When you are satisfied
with your results, you can then run the block using Code
Generation
. Long simulations run faster with generated code than in
interpreted execution. You can run repeated executions without recompiling, but if you
change any block parameters, then the block automatically recompiles before
execution.
This table shows how the Simulate using parameter affects the overall simulation behavior.
When the Simulink® model is in Accelerator
mode, the block mode specified
using Simulate using overrides the simulation mode.
Acceleration Modes
Block Simulation | Simulation Behavior | ||
Normal | Accelerator | Rapid Accelerator | |
Interpreted Execution | The block executes using the MATLAB interpreter. | The block executes using the MATLAB interpreter. | Creates a standalone executable from the model. |
Code Generation | The block is compiled. | All blocks in the model are compiled. |
For more information, see Choosing a Simulation Mode (Simulink).
Programmatic Use
Block
Parameter:SimulateUsing |
Type:enum |
Values:Interpreted
Execution , Code Generation |
Default:Interpreted
Execution |
Version History
Introduced in R2014b
See Also
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