Joint SIC-Based Precoding and Sub-Connected Architecture Design for MIMO VLC Systems

Wang, Congcong; Yang, Yang; Yang, Zhaohui; Feng, Chunyan; Cheng, Julian; Guo, Caili

doi:10.1109/tcomm.2022.3231635

Cited by 6 publications

(4 citation statements)

References 52 publications

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“…There has also been extensive research on nonlinear precoding designs [18][19][20]. Compared to linear precoding schemes, nonlinear precoding incurs higher energy consumption and complexity but achieves higher signal-to-noise ratios (SNR).…”

Section: Related Workmentioning

confidence: 99%

“…Yu et al [18] proposed ZF dirty-paper coding to attain the maximum channel capacity in MIMO systems, whereas Kim et al [19] introduced Tomlinson-Harashima precoding (THP) to reduce complexity. Wang et al [20] developed a successive interference cancellation (SIC)-based precoding scheme with sub-connected architecture (SIC-SA) to address severe MUI issues in MIMO VLC systems.…”

Section: Related Workmentioning

confidence: 99%

See 1 more Smart Citation

On Weighted Sum Rate of Multi-User Photon-Counting Multiple-Input Multiple-Output Visible Light Communication Systems under Poisson Shot Noise

Chen,

Zhou,

Wang

et al. 2024

Applied Sciences

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Photon counting has been proven to possess excellent signal detection capabilities at low power levels and has extensive potential applications in sixth-generation (6G) communications. However, the inherent dependency between the signal and noise complicates system analysis, and optimizing achievable rates in photon-counting visible light communication (VLC) systems remains unresolved. This paper introduces a new method aimed at minimizing multi-user interference (MUI) through a zero-forcing (ZF) scheme and maximizing the weighted sum rate of the proposed downlink multi-user photon-counting multiple-input multiple-output (MU-PhC-MIMO) VLC system by solving an optimization problem. The key point lies in our utilization of the ZF approach to derive a reasonable asymptotic approximation expression for the weighted sum rate. Subsequently, we use variable substitution and methods like successive convex approximation (SCA) to iteratively convexify the non-convex optimization problem and maximize the weighted sum rate under the ZF form. Compared to other algorithms, this approach can save 2.5 dB of transmission power to achieve the same system-weighted sum rate and significantly outperforms the repetition coding scheme at sufficient transmission power.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

On Weighted Sum Rate of Multi-User Photon-Counting Multiple-Input Multiple-Output Visible Light Communication Systems under Poisson Shot Noise

Chen,

Zhou,

Wang

et al. 2024

Applied Sciences

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show abstract

“…To overcome the high channel correlation issue in MIMO-VLC systems, several techniques have already been reported in the literature. For example, imaging receiver has been adopted to decorrelate the multiplexed channels for MIMO-VLC systems in [13]- [15], angle diversity transmitter and angle diversity receiver have been introduced to mitigate channel correlation in MIMO-VLC systems in [16]- [18], and various precoding and equalization techniques via digital signal processing have also been applied to reduce the high channel correlation in MIMO-VLC systems [19]- [21]. Nevertheless, all the abovementioned techniques address the high channel correlation issue by adjusting the hardware or software parts of the transceivers, which might be challenging in practical MIMO-VLC systems due to the limited transceiver resources.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Surface Configuration in IRS-Aided MIMO-VLC: A BER Minimization Approach

Zhong,

Chen,

Wen

et al. 2024

IEEE Photonics J.

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“…To address this bottleneck, several high spectral efficiency (SE) techniques have been deployed to enhance the data throughput of VLC systems. These techniques encompass adaptive modulation [9], equalization technologies [10], multiple-input multiple-output (MIMO) configurations [11], and multiple access schemes [12]. Notably, non-orthogonal multiple access (NOMA) emerges as a novel multiple access strategy, leveraging power-domain multiplexing to accommodate diverse users and employing successive interference cancellation (SIC) techniques to discern superimposed signals.…”

Section: Introductionmentioning

confidence: 99%

Research on Energy Efficiency Optimization of Visible Light Communication Based on Non-Orthogonal Multiple Access

Wu,

Sun,

Liu

et al. 2024

Electronics

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As a contender in the competitive landscape of next-generation wireless communication technologies, visible light communication (VLC) stands out due to its potential for enhancing transmission rates and spectrum resource utilization. VLC offers various advantages, including license-free operation, high confidentiality, and cost-effectiveness. However, practical implementation faces challenges stemming from the limited modulation bandwidth of light-emitting diodes (LEDs), constraining system capacity and VLC communication rates. To address this limitation, non-orthogonal multiple access (NOMA) emerges as a novel multiple access strategy, particularly suitable for enhancing the capacity and communication rates of downlink VLC systems through power multiplexing. This paper delves into the energy-efficient design of joint LED association and power allocation (LA–PA) for downlink NOMA-based VLC systems. Through an analysis of channel capacity, we transform the non-convex energy-efficient optimization model, accounting for signal non-negativity, per-LED optical power constraints, and user rate constraints, into a convex form. Subsequently, we propose an iterative power allocation algorithm to attain solutions for the optimization problem with pre-established LED associations. Furthermore, we derive a feasibility condition for an LED association, considering signal non-negativity, per-LED optical power constraints, power constraints for successive interference cancellation (SIC), and channel gain between transceiver signals. This condition identifies feasible LEDs capable of maximizing energy efficiency (EE) when combined with the aforementioned power allocation algorithm. Finally, we illustrate the superiority of the joint LA–PA scheme in terms of the EE, transmission reliability, and transmission capacity performance gain over NOMA in the context of VLC.

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Joint SIC-Based Precoding and Sub-Connected Architecture Design for MIMO VLC Systems

Cited by 6 publications

References 52 publications

On Weighted Sum Rate of Multi-User Photon-Counting Multiple-Input Multiple-Output Visible Light Communication Systems under Poisson Shot Noise

On Weighted Sum Rate of Multi-User Photon-Counting Multiple-Input Multiple-Output Visible Light Communication Systems under Poisson Shot Noise

Optimization of Surface Configuration in IRS-Aided MIMO-VLC: A BER Minimization Approach

Research on Energy Efficiency Optimization of Visible Light Communication Based on Non-Orthogonal Multiple Access

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