Agilent 5990-6030EN Understanding the SystemVue To ADS Simulation Bridge - Application Note c20140829 [9] free download

File name 5990-6030EN Understanding the SystemVue To ADS Simulation Bridge - Application Note c20140829 [9].pd

Keysight Technologies Understanding the SystemVue To ADS Simulation Bridge Application Note Introduction The Keysight Technologies, Inc. SystemVue is a new system-level design environment that enables a top-down, model-based design methodology for both communication physical layer (PHY) systems and aerospace/defense systems. This application note examines the link from SystemVue directly into an RF hardware design low that allows mutual system-RF co-veriication. At a practical level, this is achieved by adding special I/O blocks that connect datalow simulators in both SystemVue 2010.01 and Keysight Advanced Design System (ADS) 2009 Update 1. This connection allows a complex-valued, sampled I/Q datastream from SystemVue to low to ADS where it can be processed with the Circuit Envelope or Transient/Convolution circuit simulator and then return to SystemVue for coded receiver and demodulation (Figure 1). Coded baseband Closed-loop feedback for Coded baseband reference IP BER, HARQ, throughput reference IP Source SystemVue SystemVue Receiver I/O I/O ADS RF/IF ADS I/O Designs I/O RF nonlinear physical design with layout/EM Figure 1. SystemVue can drive ADS in a live co-simulation to achieve higher system-level accuracy and enable more predictive collaboration. Beneits for both baseband/DSP and RF designers This completed round trip allows system-level architects and baseband algorithm developers to beneit from the increased accuracy for analog-domain components and RF "work-in-progress." Typically, these users of math, C++, and HDL language modelling do not have access to high- accuracy, envelope-domain physical models. Instead, they do their development in isolation with inferior RF equivalents. RF circuit designers also derive a beneit from the completed round trip. Their early RF designs can be seen operating in a working system with early baseband DSP processing wrapped around them, using realistic waveforms. While ADS users are accustomed to co-verifying baseband designs with their RF circuits, in most situations, the baseband DSP has already been completed. Consequently, there is no real opportunity to change the DSP, only to verify the RF. RF design groups can now access earlier baseband investigations (in the math or C++ stages), before they are committed to implementation and while there is still time to re-partition the system design between either the baseband o