An Exact Error Analysis of Multi-User RC/MRC Based MIMO-NOMA-VLC System With Imperfect SIC

Abstract

Visible Light Communication (VLC) has appeared as a breakthrough technology for beyond 5G networks by delivering a broad license free spectrum. In this paper, multiple input multiple output (MIMO) technique is implemented with non-orthogonal multiple access (NOMA-VLC) system in order to develop a robust error-free high rate network for a multi-user scenario. In particular, a generalized multi-user MIMO-NOMA-VLC system with M N  line-of-sight (LOS) links per user is proposed which adopts on-off keying (OOK) modulation for data transmission. A novel closed form expression of probability of error for the proposed system is derived considering a practical scenario of imperfect successive interference cancellation (SIC). This paper also presents the detailed analysis of a three user 2 2  MIMO-NOMA-VLC system and an exact closed form expression of probability of error of this system is derived. The three user 2 2  MIMO-NOMA-VLC system completely outperforms the single input single output (SISO) NOMA-VLC system with same set of parameters. The error performance of the proposed system enhances as the number of photo detectors (PDs) at each user increases. A three user 2 2  MIMO-NOMA-VLC system ensures the best performance at the power allocation co-efficient of 0.3 . The error performance of the proposed system is investigated for the parameters of interest, i.e., distance between the transmitting LEDs and distance between the receiving PDs at each user terminal. The derived probability of error expressions are verified with the simulation results.INDEX TERMS Visible light communication (VLC), Non-orthogonal multiple access (NOMA), Multiple input multiple output (MIMO), Bit-error-rate (BER).

NOMA-Based VLC Systems: A Comprehensive Review

“…As an added bonus, SIC may be used to prevent intra-group interference among multiplexed users. Exploiting MIMO-VLC has the potential to greatly increase the system’s capacity by catering to a significant number of clients all at once [ 152 ]. However, the construction complexity of MIMO-PD-NOMA-aided VLC systems is increased because PD-performance NOMA is highly dependent on the power allocation approach and the user grouping approach was chosen.…”

A Survey of NOMA for VLC Systems: Research Challenges and Future Trends

“…Moreover, SIC can be performed to eliminate the interference between the multiplexed users within the same group. Exploit MIMO-VLC can substantially enhance the system capacity by serving a large number of users simultaneously [ 81 ]. However, the performance of PD-NOMA mainly depends on the adopted power allocation technique and user grouping strategy, which increases the design complexity for MIMO-PD-NOMA-based VLC systems.…”

Approaching K-Means for Multiantenna UAV Positioning in Combination With a Max-SIC-Min-Rate Framework to Enable Aerial IoT Networks

“…where the signal to noise ratio (SNR) ρ S = P S N0 , X is the set of non-decoded messages and W is the set of power allocation factors of non-decoded messages. W and X in (19) are given by (17). When the best message x i = max X with maximum power allocation factor (α i = max W ) is selected, then the best message x i is decoded according to (18) by treating other messages X\x i and AWGN n Uu as interference.…”

“…The authors in [16] considered an uplink cooperative multi-input multi-output (MIMO)-NOMA system which was able to provide a high ergodic rate by equipping a large number of antennas at the base station, relay, and two NOMA users. In [17], the authors exploited the advantage of maximum ratio combining to provide an optimal signal to interference plus noise ratio (SINR) at the receivers and leverage the MIMO technique. Maximum-ratio combining, however, may raise the receiver's complexity.…”