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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
Probes >
Adjacent Channel Power Ratio Probe (ACPRP)

Adjacent Channel Power Ratio Probe (ACPRP)

Property	Description	Units	Default	Range/Type
Name	Probe name	None	Required	String
NSAMP	Number of input samples used for acpr calculations per invocation	None	1024	(0, Inf)/Integer
IN_BAND _OFFSET	Maximum frequency offset of inband spectrum	Hz	1000	(0, £ MAX_OFFSET]/Real
OUT_BAND _OFFSET	Minimum frequency offset of outband spectrum	Hz	1000	(0, £ MAX_OFFSET]/Real
MAX_ OFFSET	Maximum frequency offset from center frequency	Hz	100000	(0, Inf)/Real
INITSAMP	Number of initial samples removed from waveform	None	0	[0, Inf)/Integer
RIN	Input impedance	Ohm	Inf	(0, Inf]/Real
Ports
Input	Input signal (complex)

Notes

1. For a given random input signal

this model computes the average power in the main band ( i.e. desired band) as well as the average power in the adjacent band ( i.e. undesired band), and then computes the ACPR as

ACPR = Power in adjacent bands/ Power in main bands = Area(B+B¢) / Area(A+A’)
The calculated ACPR quantity will be more accurate for longer input sequences. During each invocation of this model, a block of NSAMP input samples is used to compute the power spectrum of the input. This power spectrum is then used in the fashion described above to compute the ACPR. As more input blocks become available at the input, the ACPR calculations will be adjusted accordingly and tend to become more accurate.

Netlist Form

ACPRP:Name n1 NSAMP=val IN_BAND_OFFSET=val OUT_BAND_OFFSET=val
+ MAX_OFFSET=val [INITSAMP=val] [Rin=val]

Netlist Example

ACPRP:My_Acprp NSAMP=256 IN_BAND_OFFSET=10KHZ OUT_BAND_OFFSET=10KHZ MAX_OFFSET=15KHZ

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