peak_pwr()

Returns the peak power of the input voltage data

Syntax
peakP = peak_pwr(voltage, refR, percent, unit)

Arguments

Name	Description	Range	Type	Default	Required
voltage	baseband or complex envelope voltage signal	(-∞, ∞)	integer, real, complex		yes
refR	reference resistance in Ohms	(0, ∞)	real	50.0	no
percent	percentage of time the returned power value is exceeded	[0, 100]	real	0.0	no
unit	power unit to be used	"W"	"dBm"	"dBW"	string	"W"	no

Examples

peakP = peak_pwr(Vout[1], 100, , "dBW")
where Vout is a named node in a Circuit Envelope simulation, will return the peak power (in dBW) at the fundamental frequency using 100 Ohms as reference resistance.
peakP = peak_pwr(T1, , 5)

where T1 is the name of a TimedSink component (in a DSP schematic), will return the power level (in W) that is exceeded 5% of the time for the voltage signal recorded in the TimedSink using 50 Ohms as reference resistance. If the signal recorded by the TimedSink is complex envelope Gaussian noise with a standard deviation of 30 mV for each of the I and Q envelopes, then peakP will be very close to 5.39e-5 W ( -ln(0.05) / 0.03 ² / 50 ).

Defined in

$HPEESOF_DIR/expressions/ael/digital_wireless_fun.ael

See Also

peak_to_avg_pwr(), power_ccdf(), pwr_vs_t(), total_pwr()

Notes/Equations

Used in Circuit Envelope and Signal Processing simulations.
This expression can be used with input data (voltage) of any dimensions when the percent argument is 0 and up to three dimensions when the percent argument is greater than 0. It can handle both baseband as well as complex envelope data.

When the percent argument is set to 0, the returned value is the maximum instantaneous power of the input voltage signal. When the percent argument is set to a value greater than 0, the returned value is the power level that is exceeded for percent amount of time. This argument is useful since some wireless standards specify the peak power not as the absolute maximum instantaneous power but as the power level that is exceeded for some percentage of time. For example, the 3GPP standard defines the maximum power as the power level that is exceeded for 1% of the time.