SimRF Design and simulate RF systems SimRF™ provides a component library and simulation engine for designing RF systems. It includes amplifiers, mixers, S-parameter blocks, and other basic blocks for designing architectures for wireless transceivers used in communication and radar systems. You can connect these blocks arbitrarily to form diverse architectures and to simulate the behavior of the RF front-end at the system level. SimRF lets you simulate RF amplifiers to estimate gain, noise, even-order, and odd-order intermodulation distortion. The simulation of mixers enables you to predict image rejection, reciprocal mixing, local oscillator phase offsets, and DC conversion. You can also simulate frequency-dependent mismatches between linear and nonlinear components in the time and frequency domains. With SimRF you can model RF systems at different levels of abstraction. The circuit envelope solver enables high-fidelity, multicarrier simulation of networks with arbitrary topologies. The Equivalent Baseband library enables fast, discrete-time simulation of single-carrier cascaded systems. Key Features ▪ Circuit envelope solver for multiple carrier-frequency simulation ▪ Arbitrary network descriptions, enabling N-port block modeling and intra-model signal probing ▪ S-parameter data files for time-domain and frequency-domain simulations ▪ Passive components, including resistors, capacitors, inductors, transmission lines, and general impedance blocks ▪ 3-port mixer and 2-port amplifier models specified by noise figure, IP2, IP3, P1dB, and Psat ▪ Equivalent Baseband library for discrete-time simulation of single-carrier cascaded systems SimRF works with Simscape™ to simulate the performance of the RF system defined by the block diagram. Gateways to Simulink® enable signal generation and analysis features found in Communications System Toolbox™ and DSP System Toolbox™, respectively.

|lSM Band Direct Conversion Receiver! Communication system model (top right), including a direct-conversion receiver modeled with SimRF blocks (bottom left), a spectrum scope display of the input signal and interfering waveforms (top left), and constellation diagram of the demodulated output waveform (bottom right). SimRF integrates with Communications System Toolbox and DSP System Toolbox to simulate the effects of RF architectures on system performance. SimRF lets you represent RF amplifiers, mixers, impedances, transmission lines, and filters by specifying physical properties. For amplifiers...

F i« Edit Vww Dup tsy Dug ram Simulation Analysis Code Tools r- \*b\ Blotk Parameters; IF Amplifrer Model 9 linear or nonlinear amplifier. Main Monlinearity Nonlinear polynomial type: Intercept points convention: 1-dB gain compression power: Output saturation power: Gain compression at saturation: ;r.r file Edit View insert Teeb Ceskics WirelD* Hfp Circuit envelope model of a low-!F Hartley receiver (top) with an interface for setting parameters of the amplifier (bottom left) and a visualization of the S-parameters of the receiver SAW filter (bottom right). SimRF blocks are defined by linear...

File Edit View tefftaf Owytm Smulftan tnttym Co* boh Help Equivalent baseband model of an RF receiver for radar applications (left) and an example of noise link-budget analysis (right). The Equivalent Baseband library provides 2-port behavioral models of RF subsystems for link-budget analysis, and frequency-selective components are described in terms of lumped and distributed elements or S-parameter files. Wfrelasrt □ Igllal video Broadcasting vdth RF BaamT«rrtng| Detail of an RF beamforming receiver architecture (bottom right) for a home digital audio broadcasting system (top left) using blocks...

If you use blocks from the Equivalent Baseband library, the simulation is performed using a baseband equivalent model of the RF chain. This enables single-carrier simulation of super heterodyne transceivers, taking into account in-band spectral regrowth, noise, and impedance mismatches among blocks. At a lower level of abstraction, blocks from the Circuit Envelope library let you model arbitrary topologies and examine alternative architectures for your RF system. The probing capabilities of SimRF enable you to track the effects of the RF impairments through the model. If you use blocks from the...

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