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- W2077184549 abstract "Two multirate techniques, so-called the multiple-code (MC) and multicode-keying (MK) schemes, were recently proposed to support multimedia services with different bit rates in asynchronous optical code-division multiple-access (O-CDMA) systems. In the MC scheme, a user maps multiple data bit 1s to multiple code matrices and transmits them at the same time. In the MK scheme, a user only transmits one of its assigned codewords at a time, and each codeword represents a symbol of multiple data bits. In terms of error probability, the performances of these multirate schemes were also analyzed. Spectral efficiency (SE) is another figure-of-merit useful for comparing O-CDMA schemes. In this paper, the performances and SEs of the multirate MC and MK schemes are formulated and the conditions of which scheme offers a better SE are investigated with formal proofs. Numerical examples are given to validate the analyses." @default.
- W2077184549 created "2016-06-24" @default.
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- W2077184549 date "2014-04-01" @default.
- W2077184549 modified "2023-09-24" @default.
- W2077184549 title "Facilitating spectral-efficiency study of multirate optical CDMA" @default.
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- W2077184549 doi "https://doi.org/10.1109/infoseee.2014.6948155" @default.
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