Title :
Extended orthogonal code designs with applications in CDMA
Author :
Gerakoulis, Diakoumis ; Ghassemzadeh, Saeed
Author_Institution :
AT&T Labs-Res., Florham Park, NJ, USA
Abstract :
Methods of generating orthogonal codes are presented and applied in CDMA systems. These methods are used in the constructing of codes of all possible lengths up to 256. We also present orthogonal codes generated by Kronecker matrix products, called extended orthogonal codes which are used in concatenating orthogonal sequences. This approach allows individual users as well as groups of users (forming microcells, cell-sectors or beams), to be separated orthogonally. In addition, we examine complex, polyphase and other orthogonal code designs
Keywords :
Hadamard matrices; binary codes; code division multiple access; concatenated codes; matrix multiplication; sequences; CDMA; Hadamard matrices; Kronecker matrix products; PN sequences; RFI; beams; binary orthogonal codes; cell-sectors; code lengths; complex orthogonal codes; extended orthogonal code designs; microcells; orthogonal code generation; orthogonal sequences concatenation; polyphase orthogonal codes; Autocorrelation; Binary codes; Binary sequences; Bit rate; Books; Frequency synchronization; Microcell networks; Multiaccess communication; Power generation; Time division multiple access;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.876515
