MT Block Deinterleave (Matrix) VI
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, block interleaver and deinterleaver functions are used together.
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data in specifies 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 deinterleaver does not return any data if the VI 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 deinterleaver buffers the remaining samples for use in the next iteration. For example, if m=3, n=4, and if the data samples are coming in number of 27, the block deinterleaver deinterleaves 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 column and read out by row. The default is empty. |
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number of rows specifies the number of rows of the block deinterleaver. The default is 1. |
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number of columns specifies the number of columns of the block deinterleaver. The default is 1. |
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reset? specifies how the VI handles buffered data. When reset? is set to TRUE, buffered data is cleared. Input parameters are checked on a first call to this VI. Any change in the input parameter values during subsequent iterations of the VI is reflected only if reset? is set to TRUE. In continuous operations, when the buffered data is appended in the beginning of data from next iteration, set reset? to FALSE. The default is TRUE. |
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error in (no error) can accept error information wired from previously called VIs. Use this information to decide if any functionality should be bypassed in the event of errors from other VIs. Right-click the front panel error in control and select Explain Error or Explain Warning from the shortcut menu for more information about the error.
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data out returns the output of the block deinterleave operation. The data generated of a block deinterleaver is the same as the data specified to the block interleaver. |
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error out passes error or warning information out of a VI to be used by other VIs. Right-click the front panel error out indicator and select Explain Error or Explain Warning from the shortcut menu for more information about the error.
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Details
Refer to the following theoretical example for an illustration of the deinterleave operation.
If the data in parameter is entered as 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 | 0 |
| 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,…