muxintrlv
Permute symbols using shift registers with specified delays
Syntax
intrlved = muxintrlv(data,delay)
[intrlved,state] = muxintrlv(data,delay)
[intrlved,state] = muxintrlv(data,delay,init_state)
Description
intrlved = muxintrlv(data,delay) permutes
the elements in data by using internal shift registers,
each with its own delay value. delay is a vector
whose entries indicate how many symbols each shift register can hold.
The length of delay is the number of shift registers.
Before the function begins to process data, it initializes all shift
registers with zeros. If data is a matrix with
multiple rows and columns, the function processes the columns independently.
[intrlved,state] = muxintrlv(data,delay) returns
a structure that holds the final state of the shift registers. state.value stores
any unshifted symbols. state.index is the index
of the next register to be shifted.
[intrlved,state] = muxintrlv(data,delay,init_state) initializes
the shift registers with the symbols contained in init_state.value and
directs the first input symbol to the shift register referenced by init_state.index.
The structure init_state is typically the state output
from a previous call to this same function, and is unrelated to the
corresponding deinterleaver.
Examples
The examples in Convolutional Interleaving and Deinterleaving Using a Sequence of Consecutive Integers in MATLAB and on the reference
page for the convintrlv function
use muxintrlv.
The example on the reference page for muxdeintrlv illustrates
how to use the state output and init_state input
with that function; the process is analogous for this function.
References
[1] Heegard, Chris, and Stephen B. Wicker, Turbo Coding, Boston, Kluwer Academic Publishers, 1999.
Version History
Introduced before R2006a
