Performance analysis of space multiplexing by superposed signal in multi-dimensional VLC system

Qiao, Liang; Lu, Xingyu; Liang, Shangyu; Zhang, Jiao; Chi, Nan

doi:10.1364/oe.26.019762

Cited by 25 publications

(6 citation statements)

References 21 publications

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“…Then, α and β are set to 1 and 4, respectively. In the earlier discussion, we have concluded that by setting α and β in the channel matrix H, the equispaced 25QAM and 64QAM can be achieved [13]. After demodulation at the receiver side, a superposed parallelogram 8QAM is achieved, with five values in unequal probability projected on the x-axis, and eight values with equal probability projected on the y-axis, as shown in figure 1.…”

Section: The Svd and The Superposed Spacementioning

confidence: 95%

“…Moreover, the computational complexity of the MIMO demultiplexing problem may increase if we do not use the pilot to save bandwidth. Many solutions have been presented, such as overlay coding (OC) [10], superposition coded modulation (SCM) [11], successive interference cancellation (SIC) [12] and the look-up table (LUT) [13,14]. In [13], Qiao proposed the use of an SIC+LUT scheme in the multiple-input-single-output (MISO) VLC system to achieve a data rate of 1.5 Gbit/s in the 1.3-m indoor line-of-sight (LOS) scenario.…”

Section: Introductionmentioning

confidence: 99%

“…Many solutions have been presented, such as overlay coding (OC) [10], superposition coded modulation (SCM) [11], successive interference cancellation (SIC) [12] and the look-up table (LUT) [13,14]. In [13], Qiao proposed the use of an SIC+LUT scheme in the multiple-input-single-output (MISO) VLC system to achieve a data rate of 1.5 Gbit/s in the 1.3-m indoor line-of-sight (LOS) scenario. However, the proposed method may fail when the optical receiver doesn't meet the proper power proportionality received from the two transmitters.…”

Section: Introductionmentioning

confidence: 99%

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Low-complexity MIMO demultiplexing scheme based on geometric vector extraction in visible light communication system

Wang¹,

Chi²

2020

Phys. Scr.

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As one of the main optical wireless communication technologies, visible light communication (VLC) is considered a promising supplement in 5G/6G and the internet of things (IoT) networks. The multiple-input–multiple-output (MIMO) multiplexing scheme can significantly enhance a VLC system’s performance. To handle the blind MIMO demultiplexing, geometric vector extraction (GVE) algorithms are used in a mixture space (MS), which has not been presented in the extant literature. In a 2 × 2 VLC MIMO scenario, the singular value decomposition of an arbitrary MIMO channel matrix is introduced to discuss the one-to-one relationship between channel-matrix elements and the outline-shape conversion starting from the transmitted rectangular-shaped points in the MS. By extracting the vector features of the adjacent sides of the received parallelogram-shaped constellation points, we can obtain the elements of an unknown channel matrix and recover the superposed signals transmitted by two light-emitting diodes (LED). To obtain a vector from these constellation points, clustering is required to obtain the scattered points’ centroids in advance. To avoid falling into a local minimum, we present a clustering algorithm with an initial-position-expansion pre-processing stage to place the initial centroids with the greatest accumulated distance. To enhance the computational efficiency, we enhance the clustering algorithm via a single iteration to obtain the centroids, which we named the GVE-for-iteration-once (GVE–IO) algorithm. The enhanced algorithm has an equivalent or better MIMO demultiplexing performance and quick convergence performance compared to the fast independent component analysis (FastICA) algorithm. Moreover, the GVE–IO algorithm’s computational complexity and measured running time is reduced to 29% and 23%, respectively, of the FastICA algorithm’ time costs. Finally, the experimental investigation shows that the proposed scheme exhibits a significantly reduced computational complexity in all discussed voltage peak-to-peak (Vpp) cases of LED and a Q-value enhancement in two-thirds of the Vpp combination regions for 50 input points.

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Section: The Svd and The Superposed Spacementioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low-complexity MIMO demultiplexing scheme based on geometric vector extraction in visible light communication system

Wang¹,

Chi²

2020

Phys. Scr.

Self Cite

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“…After education informatization 1.0 basically solved the problem of the digitization, education informatization 2.0 will focus on exploring the deep integration of general networking, intelligent technology and education and teaching [7][8][9][10][11]. Therefore, "Internet + education" and "artificial intelligence + education" are different manifestations of education informatization 2.0.…”

Section: Introductionmentioning

confidence: 99%

iOS and Android Platform Development of Korean Professional Application-Oriented Talent Training Platform Based on Multi-Dimensional Information Transmission Algorithm

Wang¹

2023

International Journal of Science and Engineering Applications

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iOS and Android platform development of Korean professional application-oriented talent training platform based on multi-dimensional information transmission algorithm. Firstly, we consider the data security of the system. When the application executes the sensitive operation, the policy executor will request the security policy from the security decision center. If the security policy contains restriction rules for the sensitive operation, the security decision center instructs the policy executor to carry out corresponding permission control and security operation. It is necessary to first perform static analysis on the Android application specified by the user to obtain all sensitive API calls and dangerous permission requests involved in the application; then convert the obtained information into policy points, and decide whether to agree or not by operating the policy points. Dangerous requests from applications and more fine-grained API calls. With these technologies, the professional application-oriented talent training platform is implemented. Through the verification, the efficiency of the platform is tested.

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“…Currently, the studies on V2V VLC mainly focus on the line-of-sight (LOS) links that the light can directly reach the receiver from the transmitter [20][21][22]. Although V2V VLC has achieved good results in the LOS link, all the light emitted by the transmitter cannot possibly be within the field of view (FOV) of the receiver [23].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Node Selection of Intelligent Reflecting Surface-Aided Visible Light Communication for Parallel Vehicles

Zhan

Zhao

Zhang

et al. 2022

Wireless Communications and Mobile Computing

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In the visible light communication (VLC) for parallel vehicles, the light emitted by the headlamps cannot reach the photodiode (PD), which is the receiver installed on another vehicle. To solve this problem, the mirror array-based intelligent reflecting surface- (IRS-) aided VLC system is designed for parallel vehicles, and the system performance with different number of mirrors and transmission distance is analyzed. The maximum distance between adjacent IRSs is calculated via the exhaustive method, and the nearest neighbor iterative search (NNIS) algorithm is proposed for IRS node selection. Numerical results show that the SNR increases with the number of mirrors increasing. If the number of mirrors is 6 × 6 in the IRS, the maximum distance between adjacent IRSs is 37 meters. When the interval between adjacent IRSs is 32 meters, the required BER can be satisfied with merely three IRSs working together according to the NNIS algorithm.

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Performance analysis of space multiplexing by superposed signal in multi-dimensional VLC system

Cited by 25 publications

References 21 publications

Low-complexity MIMO demultiplexing scheme based on geometric vector extraction in visible light communication system

Low-complexity MIMO demultiplexing scheme based on geometric vector extraction in visible light communication system

iOS and Android Platform Development of Korean Professional Application-Oriented Talent Training Platform Based on Multi-Dimensional Information Transmission Algorithm

Performance Analysis and Node Selection of Intelligent Reflecting Surface-Aided Visible Light Communication for Parallel Vehicles

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