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Ansoft Designer / Ansys Designer 在线帮助文档：

System Simulator >
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IEEE802dot11a >
   IFFT, 802.11a (IFFT11A)       

IFFT, 802.11a (IFFT11A)

 

 


Property

Description

Units

Default

Range/Type

RIN

Input impedance

Ohm

Inf

(0, Inf]/Real

ROUT

Output impedance

Ohm

0

[0, Inf)/Real

Ports

Input

Input signal (complex)

Output

Output signal (complex)

 

Notes

1. This model can be used to implement 64-point inverse Fast Fourier Transform (IFFT) accord­ing to IEEE 802.11a standard.

2. In this model, a 64-point IFFT is used. It should be noted that the coefficients of subcarriers at the input are arranged from -32 to 31 rather than from 0 to 63. Therefore, the IFFT mapping is illustrated in Fig.1.

Fig.1 Inputs and outputs of IFFT

Netlist Form

IFFT11A:NAME n1 n2 [RIN=val] [ROUT=val]

Netlist Example

IFFT11A:1 1 2

References

1. IEEE Std 802.11a, Part 11: “Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: High-speed Physical Layer in the 5 GHz Band,” ISO/IEC 8802-11:1999/Amd 1:2000(E).

2. J. Terry and J. Heiskala, Proakis, OFDM Wireless LANs: A Theoretical and Practical Guide, Sams Publishing, 2002.



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