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System Simulator > Features and Capabilities of the System SimulatorThe following describe a number of features and capabilities
of the Designer System Simulator: • Integration of system analysis
into the Designer desktop: Enables you to perform system simulations
and analysis using Designer’s highly intuitive schematic entry,
report generation, and graphics interface. The system simulation environment
also allows you to include a higher level of detail in system designs
by co-simulating with the circuit and planar EM simulators of Designer. • Simulation of multi-channel
RF and high frequency electrical topologies: Single-tone and multi-tone
frequency domain analyses are applicable to arbitrary electrical linear
topologies interconnected by nonlinear electrical cascaded topologies.
Users are able to examine the performance of such topologies in terms
of S-parameters, NF, group delay, noise power, SNR, VSWR , internal/external
voltages and powers, as well as nonlinear figures of merit (OIP3, Psat,
P1dB, and Dynamic range applicable only to nonlinear cascaded systems).
In addition, you can view the resulting single-tone/multi-tone voltage
and power spectrums at arbitrary nodes inside an electrical topology.
This helps you examine the contribution of individual elements to voltages/powers
and intermodulation distortion (IMD) due to mixers and other nonlinear
elements. • Enhanced multi-tone IMD analysis:
This enhanced analysis is capable of calculating the output IMD for
an arbitrary number of excitation tones applied to a nonlinear electrical
topology. Output IMD results also include the effects of all IMD generated
within the system. • Enhanced discrete time signal
analysis: Enables you to simulate a variety of wired/wireless applications
that include feedback and mixed components (functional and electrical)
that are applicable to arbitrary DSP and mixed-mode topologies. Examples
include GSM, IS-95 CDMA, phase locked loops (PLLs)/frequency synthesizers,
delay-locked loops (DLLs) and sliding block correlators (SBCs) for CDMA
transceiver design, spectral re-growth, and cross modulation. • Discrete time analysis:
Includes transient, steady state, and active/thermal/phase noise responses,
as well as effects on system performance. • Discrete time simulation
results: These may be viewed in a variety of ways and at arbitrary
nodes in the system, whether in the sweep, time, or spectral domain.
In addition, a given response in the time/spectral domain may be viewed
for several values of an arbitrarily swept parameter. This helps identify
the impact of a given parameter (gain, NF, etc.) on the response of
interest. • Measurable figures of merit:
These measurements may be obtained for arbitrary swept parameters (gain,
NF, and S-parameters) and will reflect any distortion in the system
that is the result of group delay, noise, and nonlinearities. This includes
discrete time system analysis like bit error rate (BER) and adjacent
channel power ratio (ACPR). Some measurements are made available through
the use of probes, while others include phase-noise and signal-to-noise
ratios. • User-defined models:
Designers can introduce their own electrical or functional user-defined
models (UDMs) using C/C++ or MATLAB syntax. • User-defined analyses:
Designers can perform tuning, optimization, sensitivity, and statistical
analyses on system designs. • System component library:
The Designer component library supports a variety of DSP and high frequency
wired/wireless applications, along with a wide range of components.
• PSpice®: Available outputs include a subset of PSpice syntax.
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