TY - JOUR
T1 - Orthogonal complementary codes for interference-free CDMA technologies
AU - Chen, Hsiao Hwa
AU - Chiu, Hsin Wei
AU - Guizani, Mohsen
N1 - Funding Information:
The authors would like to thank the anonymous reviewers for their many constructive comments and suggestions. They would also like to grate fully acknowledge research grant NSC 93-2213-E-110-012 from the National Science Council, Taiwan.
PY - 2006/2
Y1 - 2006/2
N2 - This article addresses the issues of next-generation CDMA technologies for B3G wireless communications. To engineer a CDMA system whose performance will no longer be interference-limited, many challenging issues should be tackled, such as novel CDMA code sets, efficient spreading and carrier modulation schemes, and signaling format for high-speed burst traffic. This article reviews our ongoing research on next-generation CDMA technologies. In particular, we propose a new CDMA code design methodology, Real Environment Adapted Linearization (REAL), which can generate CDMA code sets with inherent immunity against multipath interference and multiple access interference for both uplink and downlink transmissions. It is also shown that interferencefree CDMA can only be implemented with the help of orthogonal complementary codes. The article goes further to reveal that cell-wise capacity for such interference-free CDMA is equal to the number of element codes assigned to each user, making OFDM a natural choice to implement interference-free CDMA. Several other issues of OCC-CDMA, such as its system implementation and performance, are also addressed in this article.
AB - This article addresses the issues of next-generation CDMA technologies for B3G wireless communications. To engineer a CDMA system whose performance will no longer be interference-limited, many challenging issues should be tackled, such as novel CDMA code sets, efficient spreading and carrier modulation schemes, and signaling format for high-speed burst traffic. This article reviews our ongoing research on next-generation CDMA technologies. In particular, we propose a new CDMA code design methodology, Real Environment Adapted Linearization (REAL), which can generate CDMA code sets with inherent immunity against multipath interference and multiple access interference for both uplink and downlink transmissions. It is also shown that interferencefree CDMA can only be implemented with the help of orthogonal complementary codes. The article goes further to reveal that cell-wise capacity for such interference-free CDMA is equal to the number of element codes assigned to each user, making OFDM a natural choice to implement interference-free CDMA. Several other issues of OCC-CDMA, such as its system implementation and performance, are also addressed in this article.
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U2 - 10.1109/MWC.2006.1593527
DO - 10.1109/MWC.2006.1593527
M3 - Article
AN - SCOPUS:32644479362
SN - 1536-1284
VL - 13
SP - 68
EP - 78
JO - IEEE Wireless Communications
JF - IEEE Wireless Communications
IS - 1
ER -