Returns the size of the guard interval of OFDM symbols.

This result is always 1/4 for 802.11a, 802.11j, and 802.11p signals. The value is decoded for various standards as follows:

Standards Fields
802.11n The guard interval type is decoded from HT-SIG field.
802.11ac The guard interval type is decoded from VHT-SIG-A field.
802.11ax The guard interval type is decoded from HE-SIG-A field.
802.11be The guard interval type is decoded from EHT-SIG field.
802.11bn The guard interval type is decoded from UHR-SIG field.

For 802.11ax, 802.11be, or 802.11bn TB PPDU signals, the property returns the same value as the OFDM Guard Interval Type property.

You do not need to use a selector string to read this result for default signal and result instance. Refer to the Selector Strings topic for information about the string syntax for named signals and results.

Remarks

The following table lists the characteristics of this property.

Short Name OFDMModAcc Results Guard Interval Type
Data type ci32.png
Permissions Read Only
High-level VIs N/A
Resettable No
1/4 0

The Guard interval is 1/4th of the IFFT duration.

1/8 1

The Guard interval is 1/8th of the IFFT duration.

1/16 2

The Guard interval is 1/16th of the IFFT duration.