Encoder and method for efficient synchronisation channel encoding in UTRA TDD mode

摘要

An encoder and method for efficient synchronization channel encoding in UTRA TDD mode by: producing a codeword a, where a=dG+z modulo-2, where d represents a predetermined code group to be encoded, G represents a predetermined generator matrix, and z represents a function of the code group number and a row of the generator matrix; producing values s_k=2a_2k+1+a_k;k=0, 1, 2, 3, and associated values b₀,b₁,b₂; and producing a value S_ssc associated with the code group, where S_ssc=(b₀c_π(0),b₁c_π(1),b₂c_π(2)), c_π represents a code within the code group, and b₀,b₁,b₂ε(±1,±j). This provides an efficient encoding architecture for the synchronization channel in UTRA TDD mode; and, in addition, by simple manipulation of the generation matrix, a higher chip rate signal may be signalled while still preserving the signalling information for the lower chip rate.