Patent ID: 7620115

Claim:
A Space Code Block Coding (SCBC) and spreading apparatus for transmission diversity in a Code Division Multiple Access (CDMA) communication system, the apparatus comprising: an encoding means for generating and outputting a predetermined number of different transmission data in parallel with respect to a plurality of modulation symbols inputted during one modulation symbol interval, wherein the predetermined number of different transmission data is twice as that of modulation symbols; an orthogonal code generation means for producing orthogonal codes; a spreading means for spreading each of the predetermined number of different transmission data generated from the encoding means using the orthogonal codes generated from the orthogonal code generation means; and a combining means for combining the predetermined number of different transmission data spread at the spreading means to provide combined data for each transmission antenna path so that a transmission diversity is made within said one modulation symbol interval, wherein in case where two modulation symbols are inputted during one modulation symbol interval, the encoding means generates, for a first modulation symbol, the first modulation symbol itself and its positive conjugate complex and, for a second modulation symbol, the second modulation symbol itself and its negative conjugate complex, as transmission data, the generated transmission data being simultaneously provided in parallel.