Plot the Complementary Cumulative Distribution Function (CDDF)
This example acquires a signal using an NI-SCOPE digitizer and plots the complementary cumulative distribution function (CCDF) power-level graph of the acquired signal. A CCDF graph displays how much time a signal spends at or above a given power level. This program is a shipping example VI included with the Modulation Toolkit for NI LabVIEW.
This Virtual Instrument is designed to work with RF communications hardware from National Instruments. To find compatible hardware for this application, visit ni.com/rf.
This software is written in LabVIEW, a graphical programming language designed for scientists and engineers. For more information about LabVIEW, visit ni.com/labview. To try LabVIEW online, visit the LabVIEW Online Evaluation.
Modulation Toolkit Example Programs
The National Instruments NI Modulation Toolkit For LabVIEW extends the built-in analysis capability of LabVIEW with functions and tools for signal generation, analysis, visualization, and processing of standard and custom modulation formats. With this toolkit, you can rapidly develop custom applications for research, design, characterization, validation, and test of communications systems and components that modulate or demodulate signals. Applications for the Modulation Toolkit are numerous; it includes the modulation formats - AM, FM, PM, ASK, FSK, MSK, GMSK, PSK, QPSK, PAM, QAM - that are the foundation of numerous emerging wireless technologies such as 802.11 a/b/g, ZigBee (802.15.4), WiMax (802.16a), RFID, satellite communications, and commercial broadcast among others.
More information on National Instruments signal processing can be found at the Signal Processing Resource Center.
This is a picture of the VI's front panel. To view the block diagram and additional documentation, download the attached file.
This example requires LabVIEW and the Modulation Toolkit. If you do not have access to these, you can always try them out online at the LabVIEW Online Evaluation.
Application Software: LabVIEW Full Development System 8.2
Toolkits and Add-Ons: NI Modulation Toolkit 4.0
Hardware Group: High-Speed Digitizers (Scopes)
Driver: NI-DAQmx 8.3
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