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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
WCDMA Transmitter >
   Power Amplifier (POWAMP)       

Power Amplifier (POWAMP)

 

 


Property

Description

Units

Default

Range/Type

METHOD

Constant gain {0}

Input gain {1}

TPC command {2}

None

0

[0, 2]/Integer

GAIN

Initial power gain in dB

None

0

(-Inf, 200]/Real

STEP

Step size of power adjustment in dB

None

1

[0, 200]/Real

N

Number of samples in a slot

None

200

[1, Inf)/Integer

INIT_SLOT

Number of initial invalid slots

None

10

[0, Inf)/Integer

RIN

Input impedance

Ohm

Inf

[0, Inf]/Real

ROUT

Output impedance

Ohm

0

[0, Inf)/Real

Ports

Input1

Input signal in complex envelope format (complex)

Input2

Gain or transmission power control command (integer)

Output

Output signal in complex envelope format (complex)

 

Notes

1. The Power Amplifier model can be used to amplify the input signal.

2. If Method is set to Constant gain {0}, the input signal at Input1 is amplified by Gain (dB).

3. If Method is set to Input gain {1}, Input2 must be connected and each sample corresponds N samples (i.e., one slot) at Input1. The input signal at Input1 during the first InitSlot slots is amplified by Gain (dB) and then the input signal of each slot at Input1 is amplified by the value (dB) of the corresponding sample at Input2.

4. If Method is set to TPC command {2}, Input2 also must be connected and each sample corre­sponds N samples at Input1, i.e., one slot. The input signal at Input1 during the first InitSlot slots is amplified by Gain (dB) and then the input signal of each slot at Input1 is further ampli­fied by Step (dB) if the value of the corresponding sample at Input2 (i.e., TPC command) is 1, by -Step (dB) for TPC command is -1, or kept the power of the previous slot if TPC command is 0, as shon in Fig.1.

Fig. 1 Block diagram of Power Amplifier with Method = 2.

Netlist Form:

POWAMP:NAME n1 n2 n3 [METHOD =val] GAIN =val [STEP =val] [N =val] [INIT_SLOT =val] +[RIN1=val] [RIN2=val] [ROUT=val]

Netlist Example

POWAMP:1 1 2 3 METHOD = 2 GAIN = 0 STEP = 1 N = 20 INIT_SLOT =1

References

1. S. Seo, T. Dohi, and F. Adachi, “SIR-based transmit power control of reverse link for coherent DS-CDMA mobile radio,” IEICE Trans. Commun., vol. E81-B, no. 7, pp. 1508–1516, July 1998.



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