Receiver Preamp

Receiver preamplifier

Library

Transmitters and Receivers

phasedtxrxlib

• 

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.

Parameters

Gain (dB)

Specify a scalar containing the gain in dB of the receiver preamplifier.

Loss factor (dB)

Specify a scalar containing the loss factor in dB of the receiver preamplifier.

Noise specification method

Specify the receiver noise as Noise power or Noise temperature.

Noise power

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. This parameter appears only when you set Noise specification method to Noise power.

Noise figure (dB)

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.

Reference temperature (K)

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. This parameter appears only when you set Noise specification method to Noise temperature.

Inherit sample rate

Select this check box to inherit the sample rate from upstream blocks. Otherwise, specify the sample rate using the Sample rate parameter. This parameter appears only when Noise specification method is set to Noise temperature.

Sample rate

Specify the signal sampling rate (in hertz) as a positive scalar. This parameter appears only when the Inherit sample rate parameter is not selected.

Enable enabling signal input

Select this check box to allow input of the receiver-enabling signal via the input port TR. This parameter appears only when Noise specification method is set to Noise temperature.

Enable phase noise input

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. This parameter appears only when you set Noise specification method to Noise temperature.

Simulate using

Block simulation method, 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 than they would in interpreted execution. You can run repeated executions without recompiling. However, if you change any block parameters, then the block automatically recompiles before execution.

When setting this parameter, you must take into account the overall model simulation mode. The table shows how the Simulate using parameter interacts with the overall simulation mode.

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).

Ports

Note

The block input and output ports correspond to the input and output parameters described in the step method of the underlying System object. See link at the bottom of this page.

Port	Description	Supported Data Types
X	Input signal. 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.	Double-precision floating point
TR	Enabling signal input 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. .	Double-precision floating point
Ph	Phase noise input. 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.	Double-precision floating point
Out	Output signal.	Double-precision floating point

Version History

Introduced in R2014b