SPATIAL MODULATION BASED CODEBOOK DESIGN FOR DOWNLINK DI-SCMA

• Main Author: Farahdiba, Ana
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/76200
• Institution: Institut Teknologi Bandung

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