SPATIAL MODULATION BASED CODEBOOK DESIGN FOR DOWNLINK DI-SCMA
This study was conducted to improve the performance of DI-SCMA with an overloading factor of 225%. In previous studies, DI-SCMA was able to significantly increase capa- city compared to regular SCMA, but the number of transmitted bits was not more than 2. Therefore, in this study, the author...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/76200 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | This study was conducted to improve the performance of DI-SCMA with an overloading
factor of 225%. In previous studies, DI-SCMA was able to significantly increase capa-
city compared to regular SCMA, but the number of transmitted bits was not more than
2. Therefore, in this study, the author designed a codebook for DI-SCMA users based
on spatial modulation to increase the order of transmitted information bits. The spatial
modulation techniques used in this study include SM (Spatial Modulation), QSM (Qu-
adrature Spatial Modulation), Clustered-QSM scheme 1, and Clustered-QSM scheme
2, to demonstrate the performance variation of spatial modulation-based DI-SCMA.
Additionally, the peeling decoding algorithm was employed to reduce the complexity
of detection in spatial modulation-based DI-SCMA. The results of the research show
that the spatial modulation techniques used are capable of sending higher order bits
of information. In addition, the five DI-SCMA scenarios that were carried out showed
quite good performance where with an SNR of 40dB, the five scenarios were able to
achieve a BER below 1x10?3 |
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