IQ Ref (802.11a/g/j/p OFDM)

Menu Path: Trace > Data > Channel X > IQ Ref where X is the selected channel.

When 802.11a/g/j/p 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. Demodulation is enabled, IQ Ref is the reference IQ values of the subcarriers. There is one complex value for each subcarrier for each symbol-time in the burst.

Normally this trace data is displayed as a constellation. The constellation shows both data and pilot subcarrier symbols, the pilots and data values are shown with different colors.

This is similar to Digital Demod IQ Ref Time. The difference is that there are 52 values at each symbol-time, rather than just a single value.

See Also

Available Trace Data (802.11a/g/j/p OFDM)