Large set of CI spreading codes for high-capacity MC-CDMA |
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| Authors: | Natarajan B Zhiqiang Wu Nassar CR Shattil S |
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| Institution: | Dept. of Electr. & Comput. Eng., Kansas State Univ., Manhattan, KS, USA; |
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| Abstract: | In this letter, a large set of spreading codes that doubles capacity in multicarrier code-division multiple-access (MC-CDMA) systems without any cost in bandwidth and with negligible cost in performance is introduced. This large set is comprised of: 1) complex spreading codes instead of conventional real-valued spreading codes and 2) two sets, each made up of orthogonal complex spreading codes, with minimum cross correlation between sets. Simulations performed over Rayleigh fading channels demonstrate 100% gains in terms of MC-CDMA capacity with negligible loss in performance. |
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