Visual System Simulator circuit

Posted on Feb 4, 2014

Achieving the highest possible performance from circuits used in third-and fourth-generation wireless systems is driving a tighter integration of previously disparate tools. Certainly, a level of software synergy is essential when designing circuits for use in today`s wireless systems that employ higher-order modulation techniques together with ad

Visual System Simulator circuit
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vanced technologies, such as Orthogonal Frequency Division Multiplexing (OFDM), multiple-input multiple-output (MIMO), and digital predistortion (DPD) circuits, to name a few. As this article illustrates, AWR`s Visual System Simulator (VSS) and National Instruments` LabVieW graphical programming environment are now co-simulating to better enable designers to analyze, optimize, and verify complex RF circuits, subsystems and digital signal processing within a unified framework. Before looking more closely into specific design scenarios, it is important to understand how this new and cohesive VSS/LabVIEW co-simulation environment works. The integration of VSS and LabVIEW is enabled via a new LabVIEW block within VSS. The simulation is driven by VSS and the LabVIEW block provides the interface to LabVIEW, allowing the exchange of data and parameters between the two platforms (Figure 1). This new block invokes a LabVIEW virtual instrument (VI) which in turn performs digital signal processing functions programmed through palettes provided in the graphical programming environment. This interface provides flexible configuration options with user-defined mapping of VSS nodes and parameters to the VI input and output ports. Multiple LabVIEW blocks may be placed on a VSS system diagram so that multiple VIs are executed at the same time. This integration offers VSS and LabVIEW users increased capabilities, such as expanded math and...

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