Performance Enhancement of Downlink NOMA by Combination with GSSK
Jin Woo Kim, Soo Young Shin, Victor C.M.Leung
TL;DR
This paper proposes combining NOMA with GSSK to enhance spectral efficiency and performance for cell-edge users, outperforming MIMO-NOMA by exploiting spatial domain techniques.
Contribution
The paper introduces a novel NOMA-GSSK scheme that integrates GSSK with NOMA to improve spectral efficiency and performance for downlink communications.
Findings
NOMA-GSSK outperforms MIMO-NOMA in spectral efficiency.
The proposed system improves energy efficiency and BER.
Computational complexity is comparable or better than existing methods.
Abstract
In non-orthogonal multiple access (NOMA), cell-edge users experience significantly low spectral density because only some part of the total transmit power is allocated. This leads to low spectral efficiency for the paired users in NOMA. To overcome this problem, we propose an integration of NOMA and generalized space shift keying (GSSK), called NOMA-GSSK, to improve the spectral efficiency by exploiting the spatial domain. Spectral and energy efficiency, bit error rate (BER), and computational complexity of the proposed system were analyzed and compared to those of multiple-input multiple-output NOMA (MIMO-NOMA). It is shown that NOMA-GSSK outperforms MIMO-NOMA.
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