An Interference-Reducing Precoding for SCMA Multicast Design Based on Complementary Sequences
نویسندگان
چکیده
In a multi-group multicast sparse code multiple access (SCMA) system, one base station multicasts common messages to groups via different books. To accommodate more user terminals (UTs), traditional systems have transmitters, each of which works in one-to-many mode. this way, UT is subject inter-transmitter interference. Considering the high degrees freedom for transmitting and receiving, it difficult separate desired signal from interference signals. Therefore, an interference-reducing precoding scheme required ensure reliability SCMA communication system. For system design, we present three necessary conditions that matrix should satisfy. Then, satisfying simultaneously designed by utilizing complementary sequences (CS) complete (CCS). context, consider two scenarios with transmission modes (single-cell multiple-cell) schemes (based on CS CCS). Simulation results show proposed can significantly reduce bit error rate while ensuring throughput, behave superior performance over other alternatives. Moreover, theoretical simulation also prove vectors perfect average power radiation omnidirectional coverage performance.
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ژورنال
عنوان ژورنال: IEEE Transactions on Broadcasting
سال: 2022
ISSN: ['0018-9316', '1557-9611']
DOI: https://doi.org/10.1109/tbc.2022.3201637