Joint Multi-User Decoding for Polar-Coded Uplink Non-Orthogonal Multiple Access Systems

Error Performance Analysis of Multi-user Detection in Uplink-NOMA with Adaptive $\mathcal{M}$-QAM

“…This is due to the imperfect elimination of interference which propagates from an iteration to the next. Recently, the joint maximum likelihood detector (JMLD) has attracted growing interest in both downlink and uplink schemes [5]- [12]. Even though the JMLD processing to detect the users' signal is different from that of SICD, their performance is identical in downlink scheme either under perfect or imperfect channel state information (CSI) [5].…”

“…By virtue of performance matching, SICD is mostly preferred in the downlink scheme. On the other hand, in uplink scenario, the JMLD has proved its superiority and effectiveness by surmounting the error floor problem encountered in SICD [7]- [12]. However, aforementioned studies are mostly based on only computer simulations [8], [9], [12] and are limited to very special cases [7], [10], [11].…”

“…On the other hand, in uplink scenario, the JMLD has proved its superiority and effectiveness by surmounting the error floor problem encountered in SICD [7]- [12]. However, aforementioned studies are mostly based on only computer simulations [8], [9], [12] and are limited to very special cases [7], [10], [11]. Theoretical bit error rate (BER) analysis is presented in a two-users scenario for QPSK [7] and M-PSK [10] whereas the analysis is extended for multi-user with M-PSK in [11].…”