| 摘要 |
Disclosed are a time-varying LDPC-CC encoding method and an encoder with high error correction capacity. The encoding method encodes into low density parity check convolutional codes (LDPC-CC) of time-varying period q using a parity check polynomial of encoding rate (n-1)/n (n an integer greater than or equal to 2), wherein the aforementioned time-varying period q is a prime number greater than 3. An information series is used as an input, and the information series is encoded using formula (1) as the parity check polynomial for solving the g-th (g=0, 1,..., q-1) 0. "%" means modulo, and each coefficient fulfills the following for k = 1, 2,..., n-1. "a%q=a%q=a%q=a%q=...=a%q=...=a%q=a#%q=v(v:fixed value)", "b%q=b%q=b%q=b%q=...=b%q=...=b%q=b,1%q=w(w:fixed value)", "a%q=a%q=a%q=a%q=...=a%q=...=a%q=a%q=y(y:fixed value)", "b%q=b%q=b%q=b%q=...=b%q=...=b%q=b%q=z(z:fixed value)", "a%q=a%q=a%q=a%q=...=a%q=...=a%q=a%q=s(s:fixed value)". Further, in formula (1), a, a, and a are natural numbers greater than or equal to 1, and it holds that a≠a, a≠a, and a≠a'. Further, b and bare natural numbers greater than or equal to 1, and it holds that b≠b. Further, in formula (1), v and yare natural numbers greater than or equal to 1. |
