Table Of Contents

MT Block DeInterleave (Matrix) (G Dataflow)

Version:
    Last Modified: February 7, 2018

    Performs deinterleaving by writing the input data into an m(rows) × n(columns) matrix, column by column, and then reading the data out row by row when the matrix is full. Typically, MT Block Interleave (Matrix) and MT Block DeInterleave (Matrix) are used together.

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    data in

    The input data to be deinterleaved. Data is processed in blocks of mn, where m is the number of rows and n is the number of columns. If the number of data samples is less than block size mn, the block interleaver does not generate any data if the node is run once. If the data samples are continuously fed in and if the number of data samples is greater than but not a multiple of mn, the block interleaver buffers the remaining samples for use in the next iteration. For example, if m = 3, n = 4, and 27 data samples are specified, this node interleaves two blocks (2×12=24) of data and buffers 3 samples (27-24=3) for use in the next iteration. Data is read in by row and read out by column.

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    number of rows

    The number of rows of the block deinterleaver.

    Default: 0

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    number of columns

    The number of columns of the block deinterleaver.

    Default: 0

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    reset?

    A Boolean that determines how this node handles buffered data.

    TRUE Clears the buffered data, checks the input parameters on a first call, and reflects any change in the input parameter values during subsequent iterations.
    FALSE Adds the buffered data to the beginning of data from next iteration, in continuous operations.

    Default: TRUE

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    data out

    The output of the block deinterleave operation. The data generated of a block deinterleaver is the same as the data passed into to the block interleaver.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Deinterleave Operation Example

    The following is a theoretical example of the deinterleave operation.

    If the data in parameter is 0,5,10,1,6,11,2,7,12,3,8,13,4,9,14, the block could be visualized as follows.

    0 1 2 3 4
    5 6 7 8 9
    10 11 12 13 14

    The returned deinterleaved data in the data out parameter would be 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,…

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application


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