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| R2012a Documentation → SimRF | |
Learn more about SimRF |
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| Contents | Index |
Utilities
The SimRF Outport block outputs the modulation of a signal in the SimRF circuit-envelope simulation environment as a Simulink signal. For more information about simulating RF systems, see the example, Reduce Computations by Using RF Simulation Techniques.
SimRF current and voltage signals consist of in-phase (Ik) and quadrature (Qk) components at each frequency fk specified in the SimRF Parameters block:
The Sensor type and Output parameters determine which signal the block measures.
Specify the type of signal measured by the sensor:
Ideal voltage — The block outputs the modulations of the voltage signal
at the specified Carrier frequencies in the format specified by the Output parameter.
Ideal current — The block outputs the modulations of the current signal
at the specified Carrier frequencies in the format specified by the Output parameter.
Power — The block outputs the modulations of the voltage signal
at the specified Carrier frequencies in the format specified by the Output parameter. where Zl is the value of the Load impedance (ohms) parameter.
If the Carrier frequencies parameter specifies more than one frequency, the block outputs a vector of sample-based signals. The kth output signal corresponds to the modulation of the kth carrier.
When Output is set to Power, the SimRF Outport loads the circuit with the specified impedance. When you use multiple SimRF Outport blocks as power sources at the same node in a given circuit, the resulting load is the parallel combination of the specified load impedances.
Specify the format of the output signals:
Complex Baseband — The block outputs a vector of complex-valued, sample-based signals Ik(t) + j · Qk(t) at the SL port. The kth element of the vector is the kth frequency specified by the Carrier frequencies parameter.
In-phase and Quadrature Baseband — The block outputs two vectors of real-valued, sample-based signals Ik(t) and Qk(t) at the I port and Q port, respectively. The signal at the I port contains the in-phase components, and the signal at the Q port contains the quadrature components. The kth element of the vector is the kth frequency specified by the Carrier frequencies parameter.
Magnitude and Angle Baseband — The block outputs two vectors of real-valued, sample-based signals whose elements are the magnitude and phase angle of the modulation. The Mag port outputs |Ik(t) + j · Qk(t)| and the Ang port outputs Arg[Ik(t) + j · Qk(t)]. The kth element of the vector is the kth frequency specified by the Carrier frequencies parameter.
Real Passband — The block outputs real passband signals corresponding to each carrier by multiplying the envelope signals by their carriers. The signal on the kth carrier is of the form x(t) = I(t)cos(2πfkt) – Q(t)sin(2πfkt)
Enter a vector of carrier frequencies whose elements are a subset of the frequencies specified in the SimRF Parameters block. Specify the units from the corresponding drop-down list. The default value of this parameter is 0 Hz.
Select this check box to internally ground and hide the negative terminals of the block. Clear the check box to expose the negative terminals, allowing you to connect them to other parts of your model. By default, this check box is selected.
The example compares the Real Passband and In-phase and Quadrature Baseband output options of the SimRF Outport block.
The Carrier Specification for Non-Linear Amplifiers with IP2/IP3 Verification demo shows how to use SimRF Outport blocks to probe RF systems in multiple locations.
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