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lteConvolutionalEncode

Convolutional encoding

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Syntax

output = lteConvolutionalEncode(input)

Description

output = lteConvolutionalEncode(input) returns the result of convolutionally encoding the input data vector input. The convolutional code has constraint length 7 and is tail biting with coding rate 1/3 and octal polynomials G0=133, G1=171 and G2=165. Because the code is tail-biting, output is three times the length of the input. The three encoded parity streams are concatenated block-wise to form the encoded output that is, out = [D0 D1 D2] where D0, D1, and D2 are the separate vectors resulting from encoding the input input with the individual polynomials G0, G1, and G2.

example

Examples

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Perform convolutional encoding and compare the length of the input vector to the length of the output vector.

Perform convolutional encoding of a vector of length 100.

coded = lteConvolutionalEncode(ones(100,1));
size(coded)
ans = 1×2

   300     1

The resulting output is a coded vector of length 300, which is three times the length of the input vector, as expected.

Input Arguments

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Input data vector, specified as a column vector.

Output Arguments

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Convolutionally encoded data, returned as a column vector. Because the code is tail biting, output is three times the length of the input. The three encoded parity streams are concatenated block-wise to form the encoded output that is, out = [D0 D1 D2] where D0,D1, and D2 are the separate vectors resulting from encoding the input input with the individual octal polynomials G0=133, G1=171, and G2=165.

Data Types: int8

Version History

Introduced in R2014a

See Also

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