Patent ID: 8612838

Claim:
An encoding method for a low-density parity-check convolutional code (LDPC-CC) of a time varying period of g (where g is a natural number) supporting coding rates of (y−1)/y and (z−1)/z (where y<z), the encoding method comprising: inputting information X r,i at point in time i to a parity check polynomial, the r representing each integer from 1 to z−1 on the coding rate of (z−1)/z, and representing each integer from 1 to y−1 on the coding rate of (y−1)/y; and generating, by a configured encoder, parity bits of the low-density parity-check convolutional code by using a parity check polynomial that is according to equation 1 on the coding rate of (y−1)/y, and that is according to equation 2 on the coding rate of (z−1)/z, wherein: the combination of the y and the z is any one of (2, 3), (3, 4), and (4, 5); B k ⁡ ( D ) ⁢ P ⁡ ( D ) + ∑ y - 1 r = 1 ⁢ A Xr , k ⁡ ( D ) ⁢ X r ⁡ ( D ) = 0 ⁢ ⁢ ( k = i ⁢ ⁢ mod ⁢ ⁢ g ) ( Equation ⁢ ⁢ 1 ) where D is a delay operator and k is a integer; and B k ⁡ ( D ) ⁢ P ⁡ ( D ) + ∑ z - 1 r = 1 ⁢ A Xr , k ⁡ ( D ) ⁢ X r ⁡ ( D ) = 0 ⁢ ⁢ ( k = i ⁢ ⁢ mod ⁢ ⁢ g ) ( Equation ⁢ ⁢ 2 ) where D is a delay operator and k is a integer, A xf,k (D) of equation 1 and A xf,k (D) of equation 2 are equal (where f is an integer from 1 to y−1), and B k (D) of equation 1 and B k (D) of equation 2 are equal.