Communications Toolbox™

randdeintrlv - Restore ordering of symbols using random permutation

Syntax

deintrlvd = randdeintrlv(data,state)

Description

deintrlvd = randdeintrlv(data,state) restores the original ordering of the elements in data by inverting a random permutation. The state parameter initializes the random number generator that the function uses to determine the permutation. state is either a scalar or a 35x1 vector, and is described in the rand function, which is used in randintrlv. The function is predictable for a given state, but different states produce different permutations. If data is a matrix with multiple rows and columns, the function processes the columns independently.

To use this function as an inverse of the randintrlv function, use the same state input in both functions. In that case, the two functions are inverses in the sense that applying randintrlv followed by randdeintrlv leaves data unchanged.

This function uses, by default, the Mersenne Twister algorithm by Nishimura and Matsumoto.

Note   Using the state parameter causes this function to switch random generators to use the 'state' algorithm of the rand function. See rand for details on the generator algorithm.

Examples

For an example using random interleaving and deinterleaving, see Example: Block Interleavers.

See Also

rand, randintrlv, Interleaving

quantiz

randerr