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CDMA/IS-95 >
IS-95 Finite Impulse Response Filter (FIRIS95)

IS-95 Finite Impulse Response Filter (FIRIS95)

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 (real)
Output	Output signal (real)

Notes

1. This model implements a 48-tap FIR filter based on the IS-95 specifications (Ref 1).

2. The input signal must have a sampling rate of 4.9152MHz.

3. The filter taps of the impulse response h[n] are given below:

h[0] = h[47] = -0.025288315
h[1] = h[46] = -0.034167931
h[2] = h[45] = -0.035752323
h[3] = h[44] = -0.016733702
h[4] = h[43] = 0.021602514
h[5] = h[42] = 0.064938487
h[6] = h[41] = 0.091002137
h[7] = h[40] = 0.081894974
h[8] = h[39] = 0.037071157
h[9] = h[38] = -0.021998074
h[10] = h[37] = -0.060716277
h[11] = h[36] = -0.051178658
h[12] = h[35] = 0.007874526
h[13] = h[34] = 0.084368728
h[14] = h[33] = 0.126869306
h[15] = h[32] = 0.094528345
h[16] = h[31] = -0.012839661
h[17] = h[30] = -0.143477028
h[18] = h[29] = -0.211829088
h[19] = h[28] = -0.140513128
h[20] = h[27] = 0.094601918
h[21] = h[26] = 0.441387140
h[22] = h[25] = 0.785875640
h[23] = h[24] = 1.0

Netlist Form

FIRIS95:Name n1 n2 [Rin=Val] [Rout=Val]

Netlist Example

FIRIS95:1 1 2

References

1. Mobile-Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System” TIA/EIA/IS-95-A, May 1995.

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