power_ccdf()

Returns the power CCDF (Complementary Cumulative Distribution Function) curve for the input voltage/current data

Syntax
pCCDF = power_ccdf(data, numBins)

Arguments

Name	Description	Range	Type	Default	Required
data	baseband or complex envelope voltage/current signal	(-∞, ∞)	integer, real, complex		yes
numBins	number of points in the returned power CCDF curve	[1, ∞)	integer	log2(numDataPoints)	no

Examples

pCCDF = power_ccdf(Vout[1])
where Vout is a named node in a Circuit Envelope simulation, will return the power CCDF curve for the voltage at the fundamental frequency. The returned power CCDF curve will have the default number of points.
pCCDF = power_ccdf(T1, 10)
where T1 is the name of a TimedSink component (in a DSP schematic), will return the power CCDF curve for the voltage signal recorded in the TimedSink. The returned curve will have 10 points.

Defined in

$HPEESOF_DIR/expressions/ael/digital_wireless_fun.ael

See Also

peak_pwr(), peak_to_avg_pwr(), power_ccdf_ref(), pwr_vs_t(), total_pwr()

Notes/Equations

Used in Circuit Envelope and Signal Processing simulations.
This expression can be used with input data of up to two dimensions. It can accommodate both baseband as well as complex envelope data.

The power CCDF (typically called just CCDF) measurement is a very common measurement performed on 2G and 3G wireless signals. The CCDF curve shows the probability that the instantaneous signal power will be higher than the average signal power by a certain amount of dB. The independent axis of the CCDF curve shows power levels in dB with respect to the signal average power level (0 dB corresponds to the signal average power level). The dependent axis of the CCDF curve shows the probability that the instantaneous signal power will exceed the corresponding power level on the independent axis. CCDF Curve for WLAN 802.11a 54 Mbps Signal shows the CCDF curve for a WLAN 802.11a 54 Mbps signal.

CCDF Curve for WLAN 802.11a 54 Mbps Signal

In CCDF Curve for WLAN 802.11a 54 Mbps Signal, you can see that the instantaneous signal power exceeds the average signal power (0 dB) for 20% of the time. You can also see that the instantaneous signal power exceeds the average signal power by 5 dB for only 0.3% of the time.