channel_power_vr()
Computes the power (in watts) in an arbitrary frequency channel following a Circuit Envelope simulation
Syntax
Channel_power = channel_power_vr(voltage, resistance, mainCh, winType, winConst)
Arguments
| Name | Description | Range | Type | Default | Required |
|---|---|---|---|---|---|
| voltage | single complex voltage spectral component (for example, the fundamental) across a load versus time | (-∞, ∞) | complex | yes | |
| resistance | load resistance in ohms | (-∞, ∞) | complex | 50 | no |
| mainCh | two-dimensional vector defining the main channel frequency limits (as an offset from the single voltage spectral component) † | (-∞, ∞) | real | yes | |
| winType | window type | † † | string | no | |
| winConst | window constant that affects the shape of the applied window. | [0, ∞) | real | 0.75 | no |
| † note that these frequency limits do not have to be centered on the voltage and current spectral component frequency † † winType can be: "none", "hamming", "hanning", "gaussian", "kaiser", "8510", "blackman","blackman-harris" | |||||
Examples
Vmain_fund = Vmain[1]
mainlimits = {-16.4 kHz, 16.4 kHz}
Main_Channel_Power = channel_power_vr(Vmain_fund, 50, mainlimits, "Kaiser")
where Vmain is the named connection at a resistive load (50 ohms in this case.) The {} braces are used to define a vector. Note that the computed power is in watts. Use the following equation to convert the power to dBm.
Main_Channel_Power_dBm = 10 * log(Main_Channel_Power) + 30
Do not use the dBm function, which operates on voltages.
Defined in
$HPEESOF_DIR/expressions/ael/digital_wireless_fun.ael
See Also
acpr_vi(), acpr_vr(), channel_power_vi()
Notes/Equations
Used in Channel power computations.
The user must supply a single complex voltage spectral component (for example, the fundamental) across a load versus time and the resistance of the load. The user must also supply the channel frequency limits, as offsets from the spectral component frequency of the voltage. These frequency limits must be entered as a two-dimensional vector. An optional window and window constant may also be supplied, for use in processing non-periodic data.
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