The Effect of Codebook Design on the Conventional SCMA System Performance
| Autor: | Furkan Kiraci, Emine Bardakci, Serhat Erkucuk, Yalcin Sadi |
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| Přispěvatelé: | Kiracı, Furkan, Bardakçı, Emine, Sadi, Yalçın, Erküçük, Serhat |
| Jazyk: | turečtina |
| Rok vydání: | 2020 |
| Předmět: |
Orthogonal frequency-division multiplexing
Computer science 05 social sciences codebook design Codebook NOMA 050801 communication & media studies 020206 networking & telecommunications Constellation diagram 02 engineering and technology Spectral efficiency 0508 media and communications Signal-to-noise ratio SCMA Telecommunications link 0202 electrical engineering electronic engineering information engineering Code (cryptography) Algorithm 5G |
| Zdroj: | SIU |
| Popis: | In 4G systems, Orthogonal Frequency-Division Multiple Access (OFDMA) has been used conventionally for multiple access purposes. This technique has low spectral efficiency since it allocates the resources orthogonally to each user. As an alternative to this technique, Non-orthogonal Multiple Access (NOMA) has been proposed for new generation systems as it allows different users to use the same resources and therefore, increases spectral efficiency. Sparse Code Multiple Access (SCMA) is a code-based NOMA technique and its performance depends on codebook design. In this study, a conventionally used codebook design in the literature has been considered and the system performance has been improved by increasing the distance between the signal constellation points. Considering two different design approaches, the conventional codebook has been modified and about 1dB gain has been achieved in the high signal-to-noise-ratio (SNR) region. Istanbul Medipol Univ |
| Databáze: | OpenAIRE |
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