Channel and Bit Adaptive Power Control Strategy for Uplink NOMA VLC Systems

Zhen-yu, Wang; Yu, Hongyi; Wang, Da-Ming

doi:10.3390/app9020220

Cited by 10 publications

(8 citation statements)

References 34 publications

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“…The protocol is investigated numerically in terms of average waiting time, packet collision, system utilization, and fairness. Finally, Wang, et al [21] have proposed a channel and bit adaptive power control strategy for uplink non-orthogonal multiple access VLC systems by jointly considering the channel state information and the transmission bit rate. Under this adaptive power control strategy, it is proved that the received signal at the photodiode receiver constitutes a sizable pulse amplitude modulation constellation and low-complexity maximum likelihood detection is admitted.…”

Section: Indoor Systemsmentioning

confidence: 99%

Special Issue on Light Communications: Latest Advances and Prospects

et al. 2022

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Section: Indoor Systemsmentioning

confidence: 99%

Special Issue on Light Communications: Latest Advances and Prospects

et al. 2022

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“…n k represents the zero-mean additive white Gaussian noise with variance 2 n k D N 0 =2, where N 0 is the power spectral density. In practical VLC systems, if a narrow spectral filter is used at receiver, the ambient light and the signal-dependent shot noise could be neglected; and the thermal noise from the circuitry of the receiver is dominant [18,42,43] . Therefore, we assume that the noise in the considered NOMA-VLC system is normally distributed and signalindependent.…”

Section: System Modelmentioning

confidence: 99%

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Song

Cao

Zhang

2021

Intell. and Converged Netw.

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Although Successive Interference Cancellation (SIC) decoding is widely adopted in Nonorthogonal Multiple Access (NOMA) schemes for the recovery of user data at acceptable complexity, the imperfect SIC would cause Error Propagation (EP), which can severely degrade system performance. In this work, we propose an SIC-free NOMA scheme in pulse modulation based Visible Light Communication (VLC) downlinks, including two types of users with different data rate requirements. Low bit-rate users adopt on-off keying, whereas high bit-rate ones use Multiple Pulse Position Modulation (MPPM). The soft decision decoding scheme is exploited by high bit-rate users to decode MPPM signals, which could fundamentally eliminate the detrimental effect of EP; the scheme is also easier and faster to execute compared with the conventional SIC decoding scheme. Expressions of the symbol error rate and achievable data rate for two types of users are derived. Results of the Monte Carlo simulation are provided to confirm the correctness of theoretical results.

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“…In [45], the authors compare the performance of three different NOMA schemes-MUSA, PDMA, and SCMA, a QPSK-modulated transmission over Rayleigh fading channels in underloaded, fully loaded, and overloaded scenarios, employing two different receivers that have perfect knowledge of the channels-ordered successive interference cancellation (OSIC)-based MUD and message-passing algorithm (MPA)-based MUD. In [46], the authors present some interesting simulation results when NOMA is involved in uplink visible light communication system, while [47] proposes a multiuser hybrid equalizer system for broadband uplink massive MIMO millimeter-wave (mmWave) system.…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of Massive MIMO System with Orthogonal and Nonorthogonal Multiple Access for Uplink in 5G Systems

2020

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In the attempt to respond to market demands, new techniques for wireless communication systems have been proposed to ensure, to all active users that are sharing the same network cell, an increased quality of service, regardless of any environmental factors, such as their position within the cell, time, space, climate, and noise. One example is the nonorthogonal multiple access (NOMA) technique, proposed within the 5G standard, known for supporting a massive connectivity and a more efficient use of radio resources. This paper presents two new sets of complex codes— multiple-user shared-access (MUSA) and extended MUSA (EMUSA), and an algorithm of allocation such that the intercorrelation should be as reduced as possible that can be used in MUSA for 5G NOMA-based technique scheme. Also, it analyzes the possibility of creating complex codes starting from PN (cPN), which is a novel idea proposed in this paper, whose results are promising with respect to the overall system performances. First, a description of the basic principles of MUSA are presented; next, the description of the proposed system will be provided, whose performance will be tested using Monte Carlo MATLAB simulations based on bit error rate (BER) versus signal-to-noise ratio (SNR). The system performances are evaluated in different scenarios and compared with classical code division multiple access (CDMA) having the following system parameters in sight: the number of antennas at the receiver side and the number of active users.

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Channel and Bit Adaptive Power Control Strategy for Uplink NOMA VLC Systems

Cited by 10 publications

References 34 publications

Special Issue on Light Communications: Latest Advances and Prospects

Special Issue on Light Communications: Latest Advances and Prospects

Performance analysis of a low-complexity nonorthogonal multiple access scheme in visible light communication downlinks using pulse modulations

Performance Comparison of Massive MIMO System with Orthogonal and Nonorthogonal Multiple Access for Uplink in 5G Systems

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