CCDF (MB-OFDM)
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The (Complementary Cumulative Distribution Function) trace shows the CCDF Complementary Cumulative Distribution Function for the selected input channel. The CCDF is a statistical power calculation and is performed on time-domain data. CCDF is the complement of CDF Cumulative Distribution Function: The cumulative probability that a parameter will be less than a given value X. and is defined as follows:
CCDF provides better resolution then CDF for low probability signals, especially when log format is used for the y-axis.
The CCDF is computed from the segment of the 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. burst specified by the Measurement Interval and Measurement Offset. If the Offset is zero and the Interval is equal to the result length, the burst preamble is included in the CCDF.
The VSA plots using units of percent (%) for the y-axis and power (dB) for the x-axis. Power on the x-axis is relative to the signal average power, so 0 dB is the average power of the signal. Therefore, a marker readout of:
Trace A Marker 2 dB 12 %
means there is a 12% probability that the signal power will be 2 dB or more above the average power.
See Also
Available Trace Data (MB-OFDM)
