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Journal articles on the topic 'MU precoding'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Ibrahim, Sarmad Khaleel, and Saif A. Abdulhussien. "Performance evaluation of precoding system for massive multiple-input multiple-output." Bulletin of Electrical Engineering and Informatics 11, no. 4 (2022): 2054–61. http://dx.doi.org/10.11591/eei.v11i4.3877.

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Low latency, high data speeds, and a higher degree of perceived service quality for consumers and base station capacity are only some of the advantages of fifth generation (5G) mobile communications. This paper focuses on the design of a precoding system for downlink transmission of multi-user multiple-input multiple-output (MU-MIMO). For MU-MIMO systems, the traditional precoding techniques investigated are difficult since the transmitter precoding matrices created by singular value decomposition (SVD) are calculated twice. This paper implements different techniques of precoding with channel

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2

He, Yujiao, Jianing Zhao, Lijuan Tao, Fuyu Hou, and Wei Jia. "Improved Port Modulation for Multiuser Massive MIMO Systems." International Journal of Interdisciplinary Telecommunications and Networking 7, no. 4 (2015): 15–25. http://dx.doi.org/10.4018/ijitn.2015100102.

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This paper proposes an improved port modulation (PM) method which can be applied to the multiuser (MU) massive multiple-input multiple-output (MIMO) system. The precoding process of the improved PM can be divided into two parts: port precoding and MU precoding. The methods of the precoding and detection are provided and the performance of the proposed improved PM is simulated and analyzed. Simulation results show that the proposed improved PM system can achieve a satisfying bit error rate (BER) performance with a cutdown channel state information (CSI) feedback.

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Liang, Rui, Hui Li, Yingli Dong, and Guodong Xue. "Efficient Constant Envelope Precoding for Massive MU-MIMO Downlink via Majorization-Minimization Method." Entropy 26, no. 4 (2024): 349. http://dx.doi.org/10.3390/e26040349.

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The practical implementation of massive multi-user multi-input–multi-output (MU-MIMO) downlink communication systems power amplifiers that are energy efficient; otherwise, the power consumption of the base station (BS) will be prohibitive. Constant envelope (CE) precoding is gaining increasing interest for its capability to utilize low-cost, high-efficiency nonlinear radio frequency amplifiers. Our work focuses on the topic of CE precoding in massive MU-MIMO systems and presents an efficient CE precoding algorithm. This algorithm uses an alternating minimization (AltMin) framework to optimize

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FANG, Shu, Li-hua LI, and Ping ZHANG. "Grassmannian precoding MU-MIMO scheme." Journal of China Universities of Posts and Telecommunications 15, no. 3 (2008): 105–17. http://dx.doi.org/10.1016/s1005-8885(08)60116-8.

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Lukic, Djordje B., Goran B. Markovic, and Dejan D. Drajic. "Two-Stage Precoding Based on Overlapping User Grouping Approach in IoT-Oriented 5G MU-MIMO Systems." Wireless Communications and Mobile Computing 2021 (January 7, 2021): 1–13. http://dx.doi.org/10.1155/2021/8887445.

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Downlink transmission techniques for multiuser (MU) multiple-input multiple-output (MIMO) systems have been comprehensively studied during the last two decades. The well-known low complexity linear precoding schemes are currently deployed in long-term evolution (LTE) networks. However, these schemes exhibit serious shortcomings in scenarios when users’ channels are strongly correlated. The nonlinear precoding schemes show better performance, but their complexity is prohibitively high for a real-time implementation. Two-stage precoding schemes, proposed in the standardization process for 5G new

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Lukic, Djordje B., Goran B. Markovic, and Dejan D. Drajic. "Two-Stage Precoding Based on Overlapping User Grouping Approach in IoT-Oriented 5G MU-MIMO Systems." Wireless Communications and Mobile Computing 2021 (January 7, 2021): 1–13. http://dx.doi.org/10.1155/2021/8887445.

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Downlink transmission techniques for multiuser (MU) multiple-input multiple-output (MIMO) systems have been comprehensively studied during the last two decades. The well-known low complexity linear precoding schemes are currently deployed in long-term evolution (LTE) networks. However, these schemes exhibit serious shortcomings in scenarios when users’ channels are strongly correlated. The nonlinear precoding schemes show better performance, but their complexity is prohibitively high for a real-time implementation. Two-stage precoding schemes, proposed in the standardization process for 5G new

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Trifan, Razvan-Florentin, Andrei-Alexandru Enescu, and Constantin Paleologu. "Hybrid MU-MIMO Precoding Based on K-Means User Clustering." Algorithms 12, no. 7 (2019): 146. http://dx.doi.org/10.3390/a12070146.

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Multi-User (MU) Multiple-Input-Multiple-Output (MIMO) systems have been extensively investigated over the last few years from both theoretical and practical perspectives. The low complexity Linear Precoding (LP) schemes for MU-MIMO are already deployed in Long-Term Evolution (LTE) networks; however, they do not work well for users with strongly-correlated channels. Alternatives to those schemes, like Non-Linear Precoding (NLP), and hybrid precoding schemes were proposed in the standardization phase for the Third-Generation Partnership Project (3GPP) 5G New Radio (NR). NLP schemes have better p

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Son, Vu Van, Nguyen Le Cuong, Nguyen Thu Phuong, Tran Manh Hoang, and Pham Thanh Hiep. "Approximation of Capacity for Downlink Multi-User System with Combination of Precoding and NOMA Methods." Applied Sciences 11, no. 22 (2021): 10578. http://dx.doi.org/10.3390/app112210578.

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Enhancing performance of downlink MU systems is an attractive and important research for future wireless systems. The non-orthogonal multiple access (NOMA) method was proposed to improve the performance of MU systems. In order to further improve the outage probability (OP) and ergodic capacity (EC) of downlink NOMA MU systems, we propose the combination of precoding and NOMA methods, and then the OP and EC of MU systems with our novel method are derived in scenarios of perfect and imperfect successive interference cancellation (SIC) scheme. Moreover, the closed-form expression of OP and EC for

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Shaheen, Imad, Abdelhalim Zekry, Fatma Newagy, and Reem Ibrahim. "PAPR reduction for FBMC/OQAM using hybrid scheme of different Precoding transform and mu-law companding." International Journal of Engineering & Technology 6, no. 4 (2017): 154. http://dx.doi.org/10.14419/ijet.v6i4.8326.

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The filter banks multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) is developing multicarrier modulation technique used in the next wireless communication system (5G). FBMC/OQAM supports high data rate and high band width efficiency. However, one of the major drawbacks of FBMC system is high peak to Average Power Ratio (PAPR) of the transmitted signal, which causes serious degradation in performance of the system. Therefore, it is required to use a proper PAPR scheme at the transmitter to reduce the PAPR. In this paper, a hybrid scheme is investigated with the combination of

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10

De Luna Ducoing, J. C., Yiping Qin, Yun Xue, and Konstantinos Nikitopoulos. "Gyre Precoding for MU-MIMO Systems." IEEE Communications Letters 25, no. 8 (2021): 2723–27. http://dx.doi.org/10.1109/lcomm.2021.3082808.

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Jacobsson, Sven, Giuseppe Durisi, Mikael Coldrey, Tom Goldstein, and Christoph Studer. "Quantized Precoding for Massive MU-MIMO." IEEE Transactions on Communications 65, no. 11 (2017): 4670–84. http://dx.doi.org/10.1109/tcomm.2017.2723000.

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Urquiza Villalonga, David Alejandro, Hatem OdetAlla, M. Julia Fernández-Getino García, and Adam Flizikowski. "Spectral Efficiency of Precoded 5G-NR in Single and Multi-User Scenarios under Imperfect Channel Knowledge: A Comprehensive Guide for Implementation." Electronics 11, no. 24 (2022): 4237. http://dx.doi.org/10.3390/electronics11244237.

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Digital precoding techniques have been widely applied in multiple-input multiple-output (MIMO) systems to enhance spectral efficiency (SE) which is crucial in 5G New Radio (NR). Therefore, the 3rd Generation Partnership Project (3GPP) has developed codebook-based MIMO precoding strategies to achieve a good trade-off between performance, complexity, and signal overhead. This paper aims to evaluate the performance bounds in SE achieved by the 5G-NR precoding matrices in single-user (SU) and multi-user (MU) MIMO systems, namely Type I and Type II, respectively. The implementation of these codeboo

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Castillo-Soria, Francisco R., J. Alberto Del Puerto-Flores, Cesar A. Azurdia-Meza, Vinoth Babu Kumaravelu, Jorge Simón, and Carlos A. Gutierrez. "Precoding for RIS-Assisted Multi-User MIMO-DQSM Transmission Systems." Future Internet 15, no. 9 (2023): 299. http://dx.doi.org/10.3390/fi15090299.

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This paper presents two precoding techniques for a reconfigurable intelligent surface (RIS)-assisted multi-user (MU) multiple-input multiple-output (MIMO) double quadrature spatial modulation (DQSM) downlink transmission system. Instead of being applied at the remote RIS, the phase shift vector is applied at the base station (BS) by using a double precoding stage. Results show that the proposed RIS-MU-MIMO-DQSM system has gains of up to 17 dB in terms of bit error rate (BER) and a reduction in detection complexity of 51% when compared with the conventional MU-MIMO system based on quadrature am

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14

Kalachikov, A. A. "Numerical Evaluation of the MU-MIMO Beamforming Performance with Channel Estimation." Herald of the Siberian State University of Telecommunications and Information Science 18, no. 1 (2023): 109–20. http://dx.doi.org/10.55648/1998-6920-2024-18-1-109-120.

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This paper presents the numerical evaluation of the ZF beamforming algorithm and DFT precoding using the LS channel estimation in the multiuser multiantenna (MU-MIMO) downlink system. The sum rate performance depending on a number of users are presented. The arising inter user correlation degrades the sum rate (spectral efficiency) performance of multiuser MIMO system especially in scenarios where the number of users is larger than the number of antennas at the BS. For MIMO channel simulation the QuaDRiGa channel model reflecting the real propagation conditions is used. The obtained performanc

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15

Panta, Jariya, Poompat Saengudomlert, and Karel L. Sterckx. "Efficient User Grouping for MU-MIMO Visible Light Communications Based on Block Diagonalization." ECTI Transactions on Electrical Engineering, Electronics, and Communications 20, no. 3 (2022): 329–38. http://dx.doi.org/10.37936/ecti-eec.2022203.247510.

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This paper investigates efficient user grouping methods for multi-user multi-input multi-output (MU-MIMO) visible light communication (VLC) systems. Block diagonalization (BD) precoding is considered for interference avoidance. In addition, time division multiplexing (TDM) is applied to perform user grouping when the number of users exceeds the limit of BD precoding based on the number of light emitting diode (LED) transmitters and the total number of users' photodiodes (PDs). User grouping methods are proposed based on pairwise interference considerations among users in the same group. The pr

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16

Zhang, Hong, Dong Lai Hao, and Xiang Yang Liu. "Pilots Precoding Scheme for Massive MIMO System." Advanced Materials Research 945-949 (June 2014): 2293–96. http://dx.doi.org/10.4028/www.scientific.net/amr.945-949.2293.

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There is difficult to acquire channel state information in massive MU-MIMO system. A downlink pilots precoding scheme I s proposed for efficient channel estimation. With the scheme, the BS precodes the pilot sequences and forwards to all users. The channel estimation overhead of this scheme does not depend on the number of BS antennas, and is only proportional to the number of users. We then derive several precoding techniques which enables us to implement the proposed scheme. Finally in simulation the proposed algorithm is compared with conventional algorithms without precoding training in sp

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17

Taneja, Ashu, and Nitin Saluja. "A practical approach to improve product of energy efficiency and capacity rate in MU-MIMO systems." International Journal of Pervasive Computing and Communications 16, no. 2 (2020): 183–202. http://dx.doi.org/10.1108/ijpcc-03-2019-0032.

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Purpose The major challenges in the modern-day wireless communication systems are increased co-channel interference owing to large number of users and the increased energy consumption owing to high circuit and/or hardware power consumption. Hence, the purpose of this paper is to present a practical approach involving linear precoding, channel estimation, user selection (US) and transmit antenna selection (AS) for enhanced reliability in multiuser multiple-input multiple output (MU-MIMO) system. Design/methodology/approach The proposed technique considers systematic and optimum deployment of us

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18

Kim, Jinwoo, and Chung G. Kang. "Diversity-Multiplexing-Nulling Trade-Off Analysis of Multiuser MIMO System for Intercell Interference Coordination." Wireless Communications and Mobile Computing 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/5709367.

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A fundamental performance trade-off of multicell multiuser multiple-input multiple-output (MU-MIMO) systems is explored for achieving intercell and intracell interference-free conditions. In particular, we analyze the three-dimensional diversity-multiplexing-nulling trade-off (DMNT) among the diversity order (i.e., the slope of the error performance curve), multiplexing order (i.e., the number of users that are simultaneously served by MU-MIMO), and nulling order (i.e., the number of users with zero interference in a victim cell). This trade-off quantifies the performance of MU-MIMO in terms o

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Liu, Yang, Jun Xuan Wang, Peng Wang, and Ren Kai Yu. "Joint Scheduling and Precoding Based on SLNR Criteria in MU-MIMO System." Applied Mechanics and Materials 668-669 (October 2014): 1273–77. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.1273.

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The user scheduling and precoding schemes in Multi-User Multiple Input Multiple Output (MU-MIMO) system have the problem of high complexity and the performance of traditional criteria is not good. This paper analysis the advantages of Signal to Leakage plus Noise Ratio (SLNR) criteria firstly, then propose a cross-layer design of user scheduling and precoding scheme based on SLNR criteria. The design only uses SLNR criteria and includes an improved SLNR user scheduling scheme which is accomplished by iteration procedure. Numerical results verify the improved user scheduling scheme can improve

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20

Onukwugha, Chinwe Gilean, Njoku, et al. "Bit Error Rate Analysis Of Multiuser Massive MIMO Wireless System Using Linear Precoding." International Journal of Advanced Networking and Applications 14, no. 04 (2023): 5517–22. http://dx.doi.org/10.35444/ijana.2023.14403.

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This paper presents bit error rate (BER) analysis of multiuser (MU) massive multiple input multiple out (MIMO) wireless system using linear precoding techniques. Considering the increasing demand for wireless communication that will provide seamless performance to meet users satisfaction, various precoding schemes have been developed and with massive MIMO projected to be a promising technology for 5G and next generation network. Therefore, this study was basically designed to examine the effect of linear zero forcing (ZF) and minimum mean square error (MMSE) precoders on BER performance of MU

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Khan, Imran, Mohammed H. Alsharif, Mohammad Haseeb Zafar, et al. "An Efficient Algorithm for mmWave MIMO Systems." Symmetry 11, no. 6 (2019): 786. http://dx.doi.org/10.3390/sym11060786.

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Efficient and Symmetry based precoding plays a key role in wireless communications. In order to improve the transmission performance of multi-user millimeter wave Multiple-Input Multiple-Output (MIMO) (MU-mmWave MIMO) systems, this paper proposes an analog precoding scheme for the receiver of mmWave MIMO with split sub-array hybrid analog and digital architecture. Then, we propose a hybrid analog and digital precoding algorithm based on channel reciprocity (APoCR) to maximize the spectral efficiency by utilizing the triple joint optimization problem, which can be divided into the analog and di

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Cao, Bohao, Zheng Xiang, and Peng Ren. "Low complexity transmitter precoding for MU MIMO-OTFS." Digital Signal Processing 115 (August 2021): 103083. http://dx.doi.org/10.1016/j.dsp.2021.103083.

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23

Castaneda, Oscar, Sven Jacobsson, Giuseppe Durisi, Mikael Coldrey, Tom Goldstein, and Christoph Studer. "1-bit Massive MU-MIMO Precoding in VLSI." IEEE Journal on Emerging and Selected Topics in Circuits and Systems 7, no. 4 (2017): 508–22. http://dx.doi.org/10.1109/jetcas.2017.2772191.

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Muoghalu, C. N., B. O. Ekengwu, B. O. Ekengwu, N. C. Asiegbu, and C. O. Eke-Nnodi. "Bit-to-Error Rate Performance Analysis of Massive Multiple-Antenna Downlink System." Journal of Scientific and Engineering Research 8, no. 9 (2021): 44–51. https://doi.org/10.5281/zenodo.10614528.

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<strong>Abstract</strong> This paper has presented bit-to-error rate (BER) performance analysis of multiuser (MU) massive multiple-antenna downlink system. Two precoding algorithms were used namely, zero-forcing (ZF) and maximum ratio transmission (MRT). Simulations were carried out in MATLAB environment to examine the performance of massive multiple-antenna system in terms of BER against the transmit signal to noise (SNR) with respect to increasing base station antennas M at a fixed user equipment, K. The BER for ZF is compared with MRT to examine the effectiveness of the precoding algorithms

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Joham, Michael, Paula M. Castro, Wolfgang Utschick, and Luis Castedo. "Robust Precoding With Limited Feedback Design Based on Precoding MSE for MU-MISO Systems." IEEE Transactions on Signal Processing 60, no. 6 (2012): 3101–11. http://dx.doi.org/10.1109/tsp.2012.2186446.

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Humadi, Khaled M., Ahmed Iyanda Sulyman, and Abdulhameed Alsanie. "Spatial Modulation Concept for Massive Multiuser MIMO Systems." International Journal of Antennas and Propagation 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/563273.

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This paper presents the concept of spatial modulation (SM) scheme for massive multiuser MIMO (MU-MIMO) system. We consider a MU-MIMO system whereKusers, each equipped with multiple antennas, are jointly serviced by a multiantenna base station transmitter (BSTx) using appropriate precoding scheme at the BSTx. The main idea introduced here is the utilization of the user’s subchannel index corresponding to the precoding matrix used at the BSTx, to convey extra useful information. This idea has not been explored, and it provides significant throughput enhancements in a multiuser system with large

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Lian, Dianbin, Yan Gao, Jie Lian, and Yong Li. "Joint DFT and Spacetime Coding for MU-OFDM in Power-Constrained Optical Wireless Communication Systems." Photonics 12, no. 1 (2024): 11. https://doi.org/10.3390/photonics12010011.

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The application of DFT precoding in mitigating peak-to-average power ratio (PAPR) issues in optical wireless communication systems under power constraints is well established. However, the channel spatial diversity for multiusers needs to be considered. This paper proposes a joint DFT and spacetime precoding technique to support multiple users and mitigate the PAPR for optical wireless communication systems when OFDM modulation is used. In our study, we introduce the weighted Bussgang theorem as an alternative method for evaluating the communication performance of hard-clipped systems due to t

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Hwang, Hyun-Sun, Jae-Hyun Ro, Young-Hwan You, Duckdong Hwang, and Hyoung-Kyu Song. "Partial Nulling Regularized Block Diagonalization Using Unfair Channel Selection for Post-Coding with Low-Complexity." Applied Sciences 10, no. 19 (2020): 6809. http://dx.doi.org/10.3390/app10196809.

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A number of requirements for 5G mobile communication are satisfied by adopting multi-user multiple input multiple output (MU-MIMO) systems. The inter user interference (IUI) which is an inevitable problem in MU-MIMO systems becomes controllable when the precoding scheme is used. The proposed scheme, which is one of the precoding schemes, is built on regularized block diagonalization (RBD) precoding and utilizes the partial nulling concept, which is to leave part of the IUI at the same time. Diversity gain is obtained by leaving IUI, which is made by choosing the row vectors of the channel matr

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Liu, Rang, Ming Li, Qian Liu, and A. Lee Swindlehurst. "Secure Symbol-Level Precoding in MU-MISO Wiretap Systems." IEEE Transactions on Information Forensics and Security 15 (2020): 3359–73. http://dx.doi.org/10.1109/tifs.2020.2988127.

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Lee, Won-Seok, and Hyoung-Kyu Song. "Efficient Channel Feedback Scheme for Multi-User MIMO Hybrid Beamforming Systems." Sensors 21, no. 16 (2021): 5298. http://dx.doi.org/10.3390/s21165298.

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This paper proposes an efficient channel information feedback scheme to reduce the feedback overhead of multi-user multiple-input multiple-output (MU-MIMO) hybrid beamforming systems. As massive machine type communication (mMTC) was considered in the deployments of 5G, a transmitter of the hybrid beamforming system should communicate with multiple devices at the same time. To communicate with multiple devices in the same time and frequency slot, high-dimensional channel information should be used to control interferences between the receivers. Therefore, the feedback overhead for the channels

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Zhang, Yong Bo, Jian Xin Li, and Wei Min Wen. "Research on Four Water-Filling Power Distribution Schemes in MU-MIMO System." Applied Mechanics and Materials 721 (December 2014): 635–38. http://dx.doi.org/10.4028/www.scientific.net/amm.721.635.

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It is a key issue to distribute the total transmission power among different data streams leading to larger channel capacity or lower bit error rate at the base station in MU-MIMO system. Based on MU-MIMO system model applying block diagonalization precoding (BDP) this paper presented four kinds of water-filling power distribution schemes which had been simulated for random scheduling and multiuser scheduling. The simulation results showed that respective water-filling power distribution owned maximum channel capacity and united water-filling power distribution resulted in the lowest bit error

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Bao, Xiuwen, Ming Jiang, Wenhao Fang, and Chunming Zhao. "PCQNet: A Trainable Feedback Scheme of Precoder for the Uplink Multi-User MIMO Systems." Entropy 24, no. 8 (2022): 1066. http://dx.doi.org/10.3390/e24081066.

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Multi-user multiple-input multiple-output (MU-MIMO) technology can significantly improve the spectral and energy efficiencies of wireless networks. In the uplink MU-MIMO systems, the optimal precoder design at the base station utilizes the Lagrange multipliers method and the centralized iterative algorithm to minimize the mean squared error (MSE) of all users under the power constraint. The precoding matrices need to be fed back to the user equipment to explore the potential benefits of the joint transceiver design. We propose a CNN-based compression network named PCQNet to minimize the feedba

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Handayani, Puji, and Beny Burhanusshomad. "Kinerja Multi-user MIMO OFDM dengan Block-Diagonalization Precoding." Jurnal JEETech 4, no. 1 (2023): 15–19. http://dx.doi.org/10.32492/jeetech.v4i1.4103.

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Multiple-input multiple-output (MIMO) is a transmission technology that uses more than one antenna both on the transmitter side and on the receiver side. In the communication services, the system will involve more than one active user who uses one base station (BS) together so that it is called multi-user MIMO (MU-MIMO). This paper discusses the performances of MU-MIMO when it uses block diagonalization (BD) precoding and applies minimum mean squared error (MMSE) detector. As a comparison we also apply zero-forcing (ZF) detector. From the simulations that have been done, it is found that the M

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Kalachikov, A. A., I. I. Rezvan, and A. V. Stenin. "Investigation of the influence of the effect of communication channel aging on the characteristics of precoding in the MU-MISO system at different speeds of movement of subscribers." Herald of the Siberian State University of Telecommunications and Information Science 18, no. 4 (2024): 32–42. https://doi.org/10.55648/1998-6920-2024-18-4-32-42.

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The paper deals with the impact of measured channel state delays caused by subscriber movement and the delay-related effects of channel aging on the performance of DFT codebook precoding in a downstream multi-user MISO system. The channel estimate is obtained using the MMSE algorithm. The paper discusses a precoding algorithm based on codebooks and a method based on numerical optimization for calculating precoding weight vectors in order to increase the total spectral efficiency of a multi-user system.To carry out numerical modeling, the QUADRIGA radio channel modeling package was used, which

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Wang, Wei, Yan Hui Lu, Duan Yang Li, and Shou Yi Yang. "Joint Linear Precoding and Power Allocation for MU-MIMO CR Systems with Imperfect CSI." Applied Mechanics and Materials 548-549 (April 2014): 1363–67. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1363.

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This paper proposes a joint linear precoding and power allocation design scheme for multiuser multiple-input multiple-out (MU-MIMO) cognitive radio (CR) systems, where secondary users share the same spectrum with one primary user. The interference power constraint required by the primary user and the multiuser interference generated by secondary users impose negative influence on each secondary user. As a result, it is difficult for secondary users to achieve the ideal information rate. In order to solve the above problem, we respectively adopt Channel Inversion (CI) and Block Diagonalization

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Cui, Gaofeng, Yanjie Dong, Weidong Wang, and Yinghai Zhang. "Coordinated Beamforming with Altruistic Precoding and User Selection for MU-MIMO System." International Journal of Antennas and Propagation 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/628149.

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Other cell interference (OCI) degrades the achievable capacity of downlink multiuser multiple-input multiple-output (MU-MIMO) systems seriously. Among OCI mitigation schemes, methods that sacrificeξdegrees of freedom to nullify the OCI have been proven to be helpful to improve the cell edge throughput. However, since interference nulling schemes can only improve the signal to interference plus noise ratio (SINR) ofξusers, they are not optimal in terms of average cell throughput, especially for low to medium OCI levels. We explore the question whether it is better to improve the SINR of every u

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Bakulin, Mikhail, Taoufik Ben Rejeb, Vitaly Kreyndelin, Denis Pankratov, and Aleksei Smirnov. "Multi-User MIMO Downlink Precoding with Dynamic User Selection for Limited Feedback." Sensors 25, no. 3 (2025): 866. https://doi.org/10.3390/s25030866.

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In modern (5G) and future Multi-User (MU) wireless communication systems Beyond 5G (B5G) using Multiple-Input Multiple-Output (MIMO) technology, base stations with a large number of antennas communicate with many mobile stations. This technology is becoming especially relevant in modern multi-user wireless sensor networks in various application scenarios. The problem of organizing an MU mode on the downlink has arisen, which can be solved by precoding at the Base Station (BS) without using additional channel frequency–time resources. In order to utilize an efficient precoding algorithm at the

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WANG, Weidong, Gaofeng CUI, Sixing LU, and Yinghai ZHANG. "Distributed Precoding with Limited Interference Leakage for MU-MIMO System." IEICE Transactions on Communications E94-B, no. 12 (2011): 3391–94. http://dx.doi.org/10.1587/transcom.e94.b.3391.

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Wang, Wei, Atsushi Harada, and Hidetoshi Kayama. "Enhanced Limited Feedback Schemes for DL MU-MIMO ZF Precoding." IEEE Transactions on Wireless Communications 12, no. 4 (2013): 1554–61. http://dx.doi.org/10.1109/twc.2012.030413.120051.

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Kalachikov, A., R. Bezgodkin, I. Petrov, and A. Vinnikov. "Performance Evaluation of the MU-MIMO Precoding Using the QuaDRiGa Channel Model." Proceedings of Telecommunication Universities 8, no. 1 (2022): 41–47. http://dx.doi.org/10.31854/1813-324x-2022-8-1-41-47.

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The article presents the analysis of characteristics of algorithms of signal precoding in a multi-antenna system with many users (MU-MIMO). This paper presents the numerical evaluation of the multiuser MIMO beamforming algorithms ZF and DFT codebook based on a QUADRIGA channel model, taking into account the real conditions of signal propagation. The generated channels are used to calculate SINR and the spectral efficiency values of each user using the conventional ZF and DFT beamforming codebook. The eigenvalues of the MIMO channel are important in evaluating the MU-MIMO transmission performan

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Li, Xiang, Yang Huang, Wei Heng, and Jing Wu. "Machine Learning-Inspired Hybrid Precoding for mmWave MU-MIMO Systems with Domestic Switch Network." Sensors 21, no. 9 (2021): 3019. http://dx.doi.org/10.3390/s21093019.

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Hybrid precoding is an attractive technique in MU-MIMO systems with significantly reduced hardware costs. However, it still requires a complex analog network to connect the RF chains and antennas. In this paper, we develop a novel hybrid precoding structure for the downlink transmission with a compact RF structure. Specifically, the proposed structure relies on domestic connections instead of global connections to link RF chains and antennas. Fixed-degree phase shifters provide candidate signals, and simple on-off switches are used to route the signal to antennas, thus RF adders are no longer

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Panajotović, Aleksandra, and Daniela Milović. "OPTIMAL PAIR-WISE SUS ALGORITHM AS PROPORTIONAL FAIR ALGORITHM FOR MU-MIMO-OFDM SYSTEMS." Facta Universitatis, Series: Automatic Control and Robotics 19, no. 1 (2020): 011. http://dx.doi.org/10.22190/fuacr2001011p.

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In this paper, we research proportional fairness of the optimal pair-wise semi-orthogonal user selection (SUS) algorithm used in the MU-MIMO-OFDM system compliant with IEEE 802.11ac standard. Zero-forcing beamforming (ZFBF) is applied in the system as a precoding technique in order to cancel user interferences. Two different scenarios are considered: homogeneous and heterogeneous. Beside the proportional fairness, a throughput performance of the MU-MIMO-OFDM system is analyzed for both scenarios too. Simulation results show that the optimal pair-wise SUS algorithm is an excellent solution to r

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Qi, Fei, Xuetian Zhu, Xinran Zhang, and Songlin Sun. "Hybrid Multicast Transmission for Public Safety Network in 5G." Mobile Information Systems 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/4306356.

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We investigate the application of wireless multicast technology in public safety network (PSN) in future wireless communication system. The hybrid unicast/multicast transmission system is proposed and analyzed in 3D massive multi-input multioutput (MIMO) channel. The mutual coupling channel model is adopted under the different antenna array configuration scenarios. The proposed hybrid system adopts multicast beamforming in the multicast groups as well as multiuser-MIMO (MU-MIMO) linear precoding in the unicast group to increase system throughput. The null space method based interference cancel

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Kalachikov, A. "Numtrical Evaluation of Optimal Precoding Algorithm and Zero Forcing Precoding in MU-MISO Channel with Channel Aging." Proceedings of Telecommunication Universities 10, no. 2 (2024): 7–14. http://dx.doi.org/10.31854/1813-324x-2024-10-2-7-14.

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In paper the numerical investigation of the impact of delayed channel state information (CSI) due to user movement and caused channel aging on the performance of multiuser precoder in downlink MISO system. The time variant CSI is obtained by the least squares channel estimation. We consider Zero Forcing algorithm and numerical optimization based solution of calculating precoder vectors maximizimg sum rate of multiuser system. For numerical simulation the QuaDRiGa channel model reflecting the real propagation conditions for moving users is used. The obtained performance of multiuser Zero Forcin

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Niu, Guanchong, Qi Cao, and Manon Pun. "Block Diagonal Hybrid Precoding and Power Allocation for QoS-Aware BDMA Downlink Transmissions." Sensors 20, no. 16 (2020): 4497. http://dx.doi.org/10.3390/s20164497.

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Beam Division Multiple Access (BDMA) with hybrid precoding has recently been proposed for multi-user multiple-input multiple-output (MU-MIMO) systems by simultaneously transmitting multiple digitally precoded users’ data-streams via different beams. In contrast to most existing works that assume the number of radio frequency (RF) chains must be greater than or equal to that of data-streams, this work proposes a novel BDMA downlink system by first grouping transmitting data-streams before digitally precoding data group by group. To fully harvest the benefits of this new architecture, a greedy u

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Fu Hongliang, Zhang Beibei, Tao Huawei, and Lu Jing. "Multi-carrier MU-MIMO Limited Feedback Precoding Based on Compressed Sensing." International Journal of Advancements in Computing Technology 5, no. 7 (2013): 427–33. http://dx.doi.org/10.4156/ijact.vol5.issue7.52.

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Singh, Jagtar, and Deepak Kedia. "Improved Precoding Algorithm Design for Downlink Large Scale MU-MIMO System." International Journal of Intelligent Engineering and Systems 13, no. 3 (2020): 143–53. http://dx.doi.org/10.22266/ijies2020.0630.14.

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Kreyndelin, V. B., and T. B. K. Ben Rejeb. "CLTD-OSIC NONLINEAR PRECODING ALGORITHM FOR MU-MIMO TDD MULTIUSER SYSTEMS." Telecommunications and Radio Engineering 77, no. 7 (2018): 591–602. http://dx.doi.org/10.1615/telecomradeng.v77.i7.30.

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Ahn, Yongjin, Taeyoung Kim, and Chungyong Lee. "A Beam Steering Based Hybrid Precoding for MU-MIMO mmWave Systems." IEEE Communications Letters 21, no. 12 (2017): 2726–29. http://dx.doi.org/10.1109/lcomm.2017.2747551.

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Kim, Hak-Jin, Jong-Seob Baek, Ji-Myung Oh, and Jong-Soo Seo. "Improved Leakage-Based Precoding with Vector Perturbation for MU-MIMO Systems." IEEE Communications Letters 16, no. 11 (2012): 1868–71. http://dx.doi.org/10.1109/lcomm.2012.092812.121688.

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