国家重点实验室 Encoding o Notation XN=uNGN Gy-coset code x=uaGw(A)田4Gx(Ac） Codeword: Information bits:uAE Frozen bits:4Ae∈XW-A Information set:A∈{l,2,.,W} Code dimension:K=A Code rate:R=K /N Individual Gy -coset code will be identified by a parameter vector (N,K,A,u) Complexity:O(Nlog N) 28Encoding 28 1 1 N N N x uG = 1 ( ) c ( ) N c N N x uG u G Α Α = Α⊕ Α -coset code GN Information bits: K u Α ∈  Information set: Α ⊆ {1, 2, , }  N Code dimension: K = |A | Code rate: R KN = / Frozen bits: c N K u − Α ∈ Individual - coset code will be identified by a parameter vector (, ) NK u c Α Α GN Notation 1 N Codeword: x Complexity:ON N ( log )