Description
Description-Separate-1Overview
This example demonstrates demodulation of a frequency-modulated signal acquired using the RF signal analyzer (RFSA). The example first configures the RFSA in terms of modulation-domain parameters. Depending on your settings, this example acquires either intermediate frequency (IF) or I-Q data directly from the digitizer module. If the VI acquires IF data from the hardware, the IF to I-Q downconversion is done in software using the MT Convert IF to I-Q VI. The complex-envelope baseband data is then demodulated to retrieve the original information signal. You can perform measurements on the demodulated signal to calculate the FM deviation of the original modulated signal. 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.
This software is written in LabVIEW, a graphical programming language designed for scientists and engineers. For more information about LabVIEW, visit ni.com/labview.
Modulation Toolkit Example Programs
The National Instruments NI Modulation Toolkit For LabVIEW extends the built-in analysis capability ofLabVIEW 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 Analysis and Signal Processing with LabVIEW.
Front Panel
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.
Related Links
Description-Separate-2