Documentation

This is machine translation

Translated by Microsoft
Mouse over text to see original. Click the button below to return to the English verison of the page.

lteConvolutionalEncode

Convolutional encoding

Syntax

  • output = lteConvolutionalEncode(input)
    example

Description

example

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.

Examples

collapse all

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 =

   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

collapse all

Input data vector, specified as a column vector.

Output Arguments

collapse all

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

Introduced in R2014a

Was this topic helpful?