IS-95A Fwd Ch Interleaver/Deinterleaver (CDMA Reference Blockset)

Interleave or deinterleave the symbols of the incoming frame

Library

IS-95 Base Station Transmitter

Description

This block interleaves or deinterleaves the symbols of the incoming frame. The Paging and Traffic channel interleaver time span is 20 ms equivalent to 384 symbols. The Sync channel, however, uses an interleaver spanning 26.67 ms equivalent to 128 symbols. The interleaver writes the code symbols into the matrix on a column-by-column basis for all of the input data symbols and reads the stored data into the output buffer in accordance with the IS-95A specification. The deinterleaver restores the interleaved symbols into the original order.

Inputs

Real vector (of binary data for interleaver functionality) that represents the data frame to be interleaved or deinterleaved. The size of the input is 384 for the Paging and Traffic channels and 128 for the Sync channel.

Outputs

Real vector (of binary data for interleaver functionality) that represents the symbols of the interleaved or deinterleaved output frame. The size of the input is 384 for the Paging and Traffic channels and 128 for the Sync channel.

Dialog Box

Parameters

Channel type: The channel type, either Sync, Paging, or Traffic.
Function: Interleaver or Deinterleaver.

Specification References

IS-95A 6.1.3.1.5, 7.1.3.1.5
J-STD-008 2.1.3.1.5, 3.1.3.1.6

IS-95A Fwd Ch Detector IS-95A Fwd Ch Power Bit Extractor