Matrix Helical Scan Interleaver

Description

The Matrix Helical Scan Interleaver block performs block interleaving by filling a matrix with the input symbols row by row and then sending the matrix contents to the output port in a helical fashion. TheNumber of rowsandNumber of columns参数t矩阵的维度he block uses internally for its computations.

Helical fashion means that the block selects output symbols by selecting elements along diagonals of the matrix. The number of elements in each diagonal matches theNumber of columnsparameter, after the block wraps past the edges of the matrix when necessary. The block traverses diagonals so that the row index and column index both increase. Each diagonal after the first one begins one row below the first element of the previous diagonal.

TheArray step sizeparameter is the slope of each diagonal, that is, the amount by which the row index increases as the column index increases by one. This parameter must be an integer between zero and theNumber of rowsparameter. If theArray step sizeparameter is zero, then the block does not interleave and the output is the same as the input.

This block accepts a column vector input signal. The number of elements of the input vector must be the product ofNumber of rowsandNumber of columns.

The block accepts the following data types:int8,uint8,int16,uint16,int32,uint32,boolean,single,double, and fixed-point. The output signal inherits its data type from the input signal.

Parameters

Examples

If theNumber of rowsandNumber of columnsparameters are 6 and 4, respectively, then the interleaver uses a 6-by-4 matrix for its internal computations. If theArray step sizeparameter is 1, then the diagonals are as shown in the figure below. Positions with the same color form part of the same diagonal, and diagonals with darker colors precede those with lighter colors in the output signal.

Given an input signal of[1:24]', the block produces an output of

[1; 6; 11; 16; 5; 10; 15; 20; 9; 14; 19; 24; 13; 18; 23;... 4; 17; 22; 3; 8; 21; 2; 7; 12]

Pair Block

Matrix Helical Scan Deinterleaver