CDMA Reference Blockset    
IS-95A Rev Ch Interleaver/Deinterleaver

Interleave or deinterleave a data frame for the Access channel or the reverse Traffic channel

Library

IS-95A Mobile Station Transmitter

Description


This block interleaves or deinterleaves a data frame for the Access channel or reverse Traffic channel. The interleaving time span is 20 ms. The interleaver is a matrix of 32 rows and 18 columns. The interleaver writes the code symbols into the matrix on a column-by-column basis for all of the input data symbols. It then reads the stored data into the output buffer on a row-by-row basis in accordance with the IS-95A specification to achieve the interleaving functionality. The deinterleaver restores the interleaved symbols to the original order.

Inputs

Rate
Integer scalar that specifies the data rate for the input signal. To indicate a rate fraction of Full, Half, Quarter, or Eighth, use an input value of 0, 1, 2, or 3, respectively. The table below shows all valid channel types and rate fractions, along with their associated data rates and Rate input values.

Channel Type
Data Rate (bps)
Input Value
Access (always Half rate)
4800
1
Traffic, Rate Set I, Full
9600
0
Traffic, Rate Set I, Half
4800
1
Traffic, Rate Set I, Quarter
2400
2
Traffic, Rate Set I, Eighth
1200
3
Traffic, Rate Set II, Full
14400
0
Traffic, Rate Set II, Half
7200
1
Traffic, Rate Set II, Quarter
3600
2
Traffic, Rate Set II, Eighth
1800
3
Frame In
Real vector (of binary data for interleaver functionality) of size 576 representing the input frame to be interleaved or deinterleaved.

Outputs

Real vector of (of binary data for interleaver functionality) of size 576 representing the interleaved or deinterleaved output frame.

Dialog Box

Parameters

Channel type
The channel type, either Access or Traffic.
Function
Interleaver or Deinterleaver.

See Also

IS-95A Fwd Ch Interleaver/Deinterleaver
IS-95A Reverse Traffic Channel Transmitter Demo
IS-95A Reverse Traffic Channel Codec Demo

Specification References

IS-95A 6.1.3.1.5
J-STD-008 2.1.3.1.5


 IS-95A Rev Ch Detector IS-95A Rev Ch Rake Finger