Qian Cui
ABSTRACT
Sparse code multiple access (SCMA) is a vital technique for Future fifth-generation (5G) which outperforms at spectral efficiency (SE) and transmission rate. This paper firstly studies feasibilities of SCMA in logging cable telemetry systems (LCTSs) with an optimal 16-point codebook. The orthogonal frequencies within bandwidth are divided into groups and elements in each group are treated as users which are modulated by codebooks. An optimal (6,16,2,4)-SCMA codebook is designed for LCTSs by two 64-point real constellations. It is demonstrated that SCMA outperform Orthogonal Frequency Division Multiple Access (OFDMA) and low density signature LDS on transmission rate, bit error rate (BER) performance, peak-to-average power ratio and robustness of sampling frequency offset. It should be noted that this feasibility study provides some tips for single-input single-output (SISO) wired systems like LCTSs and some power line communications (PLCs) to improve transmission rate.
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