Convolutional Interleaver
Rearranging input characters using a set of shift registers.
blockType: ConvolutionalInterleaver
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Path in the library: |
| System object |
Description
Block Convolutional Interleaver rearranges the characters in the input signal. It uses a set of shift registers inside it.
Parameter Initial conditions specifies the values that fill each shift register at the beginning of the simulation (with the exception of the first shift register, which has zero delay). If the parameter Initial conditions If it is a scalar, then its value fills all shift registers except the first one. If Initial conditions — column vector, the length of which is equal to the parameter Rows of shift registers, then each element of this vector fills the corresponding shift register. The value of the first parameter element Initial conditions it is not used because the first shift register has zero delay.
Ports
Input
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IN_1
—
Input signal
scalar | vector | the matrix
Details
The input signal in which you need to rearrange the characters.
| Data types |
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| Complex numbers support |
Yes |
Output
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OUT_1
—
Output signal
scalar | vector | the matrix
Details
Output signal with rearranged symbols.
The type and size of the output signal corresponds to the type and size of the input.
| Data types |
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| Complex numbers support |
Yes |
Parameters
Main
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Rows of shift registers —
shift register strings
Scalar / array of real numbers
Details
The number of shift registers that the block uses internally.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
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Register length step —
register length step
Scalar / array of real numbers
Details
The number of characters by which the length of each subsequent shift register differs. Zero characters are stored in the first case.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
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Initial conditions —
initial conditions
Scalar / array of real and/or complex numbers
Details
The values that fill in each shift register at the beginning of the simulation.
| Default value |
|
| Program usage name |
|
| Tunable |
No |
| Evaluatable |
Yes |
Additional Info
Delay of convolutional interleaving and de-interleaving (recovery)
Details
The total delay of the convolutional interleaving and de-interleaving methods is
where
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— the number of registers equal to the parameter value Rows of shift registers;
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— register length step equal to the parameter value Register length step.
The diagram below shows the structure of a common interleaver consisting of a set of shift registers, each of which has a preset delay, denoted as , and a switch for switching input and output characters through registers. The -th shift register contains characters where and it has a delay value equal to . With each new input character, the switch switches to a new register and enters a new character, while simultaneously deleting the oldest character in that register. When the switchboard reaches On the next new input, the switch returns to the first register.
