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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
System Component Models >
WCDMA Transmitter >
   Spreader (SPREADER)       

Spreader (SPREADER)

 

 


Property

Description

Units

Default

Range/Type

G

Spreading Factor

None

16

[1, Inf)/Integer

S

Number of samples per chip

None

4

[1, 128]/Integer

FC

Carrier frequency in Hz

Hz

0

[0, Inf)/Real

Rin1

Input1 impedance

Ohm

Inf

(0, Inf]/Real

Rin2

Input2 impedance

Ohm

Inf

(0, Inf]/Real

Rout

Output impedance

Ohm

0

[0, Inf]/Real

Ports

Input1

Input signal in complex envelope format (complex )

Input2

Spreading code (complex)

Output

Symbols after spreading (complex)

 

Notes

1. The Spreader model can be used to perform spreading (i.e., each sample at Input1 multiplies G samples at Input2 and thus G products are obtained) and then repeat the outcome S times.

Netlist Form

SPREADER:NAME n1 n2 n3 G =val S =val [FC =val] [RIN1=val] [RIN2=val] [ROUT=val]

Netlist Example

SPREADER:1 1 2 3 G = 31 S = 4

References

1. J. G. Proakis, Digital Communications, McGraw-Hill, 2001.

2. R. L. Peterson, R. E. Ziemer, and D. E. Borth, Introduction to Spread Spectrum Communica­tions. Prentice Hall International Editions, 1995.



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