Custom Modulation Tab (Custom OFDM)

Menu Path: Analysis > Custom OFDM Properties > Custom Modulation tab

The Custom Modulation tab contains controls for importing, exporting and editing custom modulations. The custom modulation feature in the Custom OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. measurement allows users to define a custom symbol mapping for known modulation schemes, by creating a .txt file that describes this mapping and importing that file, or by creating a custom modulation within the VSA software.

A constellation mapping can be imported by clicking the import button. Upon selecting the file to be imported, and completing the import process, a new custom modulation will appear in the table. Selecting this custom modulation will allow the user to view the constellation mappings in the corresponding table on the right. In addition, the custom modulation can be edited and exported to a file.

The Custom Modulation tab configures and displays these parameters:

Constellation Mapping

• Import
• Export

Custom Modulation Editor

• + Add Custom Modulation
• Name
• Modulation Format
• Remove Custom Modulation (icon)

Constellation Table

• Symbol
• Real
• Imaginary
• Magnitude
• Phase
• Edit

Constellation Editor

• + Add State
• Modulation
• Remove State
• Cancel
• Apply

See Also

Custom OFDM Properties Dialog Box