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- W1484098127 abstract "In this paper, a transmit diversity scheme based on space-time spreading for code-division multiple-access (CDMA) systems in fast-fading channels is introduced. The proposed transmit diversity scheme employs orthogonal Walsh spreading codes to exploit the time diversity introduced by the channel, and hence achieves two-fold of the diversity order obtained using conventional space-time spreading schemes. A generalization of the proposed coding scheme to systems with different antenna configurations is also discussed. For slowly-fading channels, we show that the proposed transmit diversity scheme reduces to that of conventional transmit diversity schemes with no performance degradation. For nonorthogonal spreading codes, we propose a receiver structure that employs an interference cancellation scheme to compensate for signal interference. Our results show a large performance improvement when using such an interference cancellation scheme relative to the conventional matched filter receiver." @default.
- W1484098127 created "2016-06-24" @default.
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- W1484098127 date "2005-12-10" @default.
- W1484098127 modified "2023-09-26" @default.
- W1484098127 title "Space-Time Spreading for MIMO CDMA-Based Systems over Fast-Fading Channels" @default.
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- W1484098127 doi "https://doi.org/10.1109/wirles.2005.1549454" @default.
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