Massive MIMO in Mobile Networks

Distributed MIMO (D-MIMO) systems are expected to play a key role in deployments for future mobile communications. Together with massive MIMO technology, D-MIMO aims to maximize the spectral efficiency and data rate in mobile networks. This paper proposes a deep study on the spectral efficiency of D-MIMO systems for essential channel parameters, such as the channel power balance or the correlation between propagation channels. For that purpose, several propagation channels were acquired in both anechoic and reverberation chambers and were emulated using channel simulators. In addition, several frequency bands were studied, both the sub–6 GHz band and mmWave band. The results of this study revealed the high influence of channel correlation and power balance on the physical channel performance. Low-correlated and high-power balance propagation channels show better performances than high correlated and power unbalance channels in terms of spectral efficiency. Given these results, it will be fundamental to take into account the spectral efficiency of D-MIMO systems when designing criteria to establish multi-connectivity in future mobile network deployments.

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Performance Investigation of NOMA versus OMA Techniques for mmWave Massive MIMO Communications

10.36227/techrxiv.16599347.v1 ◽

2021 ◽

Author(s):

Joydev Ghosh ◽

Vishal Sharma ◽

Huseyin Haci ◽

Saurabh Singh ◽

In-Ho Ra

Keyword(s):

Mobile Networks ◽

Massive Mimo ◽

Multiple Access ◽

Advanced Technology ◽

Mimo Communications ◽

Transmission Strategy ◽

Seamless Connectivity ◽

Fifth Generation ◽

Industrial Internet ◽

Improved Performance

The fifth-generation (5G) of cellular technology is currently being deployed over the world. In the next decade of mobile networks, beyond 5G (B5G) cellular networks with the under-development advanced technology enablers are expected to be a fully developed system that could offer tremendous opportunities for both enterprises and society at large. B5G in more ambitious scenarios will be capable to facilitate much-improved performance with the significant upgrade of the key parameters such as massive connectivity, ultra-reliable and low latency (URLL), spectral efficiency (SE) and energy efficiency (EE). Equipping non-orthogonal multiple access (NOMA) with other key drivers will help to explore systems’ applicability to cover a wide variety of applications to forge a path for future networks. NOMA empowers the networks with seamless connectivity and can provide a secure transmission strategy for the industrial internet of things (IIoT) anywhere and anytime. Despite being a promising candidate for B5G networks a comprehensive study that covers operating principles, fundamental features and technological feasibility of NOMA at mmWave massive MIMO communications is not available. To address this, a simulation-based comparative study between NOMA and orthogonal multiple access (OMA) techniques for mmWave massive multiple-input and multiple-output (MIMO) communications is presented with performance discussions and identifying technology gaps. Throughout the paper, aspects of operating principles, fundamental features and technological feasibility of NOMA are discussed. Also, it is demonstrated that NOMA not only has good adaptability but also can outperform other OMA techniques for mmWave massive MIMO communications. Some foreseeable challenges and future directions on applying NOMA to B5G networks are also provided.

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Massive MIMO, mmWave and mmWave-Massive MIMO Communications: Performance Assessment with Beamforming Techniques

10.21203/rs.3.rs-69959/v1 ◽

2020 ◽

Author(s):

Tewelgn Kebede Engda ◽

Yihenew Wondie ◽

Johannes Steinbrunn

Keyword(s):

Mobile Networks ◽

Massive Mimo ◽

Performance Metrics ◽

Mimo Systems ◽

Multiple Input Multiple Output ◽

Low Complexity ◽

Fifth Generation ◽

Emerging Trends ◽

Multiple Input ◽

Input Multiple Output

Abstract A considerable amount of enabling technologies are being explored in the era of fifth generation (5G) mobile system. The dream is to build a wireless network that substantially improves the existing mobile networks in all performance metrics. To address this 5G design targets, massive MIMO (multiple input multiple output) and mmWave (millimeter wave) communication are also candidate technologies. Luckily, in many respects these two technologies share a symbiotic integration. Accordingly, a logical step is to integrate mmWave communications and massive MIMO to form mmWave-massive MIMO which substantially increases user throughput, improve spectral and energy efficiencies, increase the capacity of mobile networks and achieve high multiplexing gains. Thus, this work analyses the concepts, performances, comparison and discussion of these technologies called: massive MIMO, mmWave Communications and mmWave-massive MIMO systems jointly. Besides, outcomes of extensive researches, emerging trends together with their respective benefits, challenges, proposed solutions and their comparative analysis is addressed. The performance of hybrid analog-digital beamforming architecture with a fully digital and analog beamforming techniques are also analyzed. Analytical and simulation results show that the low-complexity hybrid analog-digital precoding achieves all round comparable precoding gains for mmWave-Massive MIMO technology.

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Ultra-broadband mobile networks from LTE-Advanced to 5G: Evaluation of massive MIMO and multi-carrier aggregation effectiveness

2017 AEIT International Annual Conference ◽

10.23919/aeit.2017.8240565 ◽

2017 ◽

Cited By ~ 1

Author(s):

Marco Neri ◽

Maria-Gabriella Di Benedetto ◽

Tommaso Pecorella ◽

Camillo Carlini ◽

Andrea Castellani ◽

...

Keyword(s):

Mobile Networks ◽

Massive Mimo ◽

Carrier Aggregation ◽

Lte Advanced

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Performance Investigation of NOMA versus OMA Techniques for mmWave Massive MIMO Communications

10.36227/techrxiv.16599347 ◽

2021 ◽

Author(s):

Joydev Ghosh ◽

Vishal Sharma ◽

Huseyin Haci ◽

Saurabh Singh ◽

In-Ho Ra

Keyword(s):

Mobile Networks ◽

Massive Mimo ◽

Multiple Access ◽

Advanced Technology ◽

Mimo Communications ◽

Transmission Strategy ◽

Seamless Connectivity ◽

Fifth Generation ◽

Industrial Internet ◽

Improved Performance

The fifth-generation (5G) of cellular technology is currently being deployed over the world. In the next decade of mobile networks, beyond 5G (B5G) cellular networks with the under-development advanced technology enablers are expected to be a fully developed system that could offer tremendous opportunities for both enterprises and society at large. B5G in more ambitious scenarios will be capable to facilitate much-improved performance with the significant upgrade of the key parameters such as massive connectivity, ultra-reliable and low latency (URLL), spectral efficiency (SE) and energy efficiency (EE). Equipping non-orthogonal multiple access (NOMA) with other key drivers will help to explore systems’ applicability to cover a wide variety of applications to forge a path for future networks. NOMA empowers the networks with seamless connectivity and can provide a secure transmission strategy for the industrial internet of things (IIoT) anywhere and anytime. Despite being a promising candidate for B5G networks a comprehensive study that covers operating principles, fundamental features and technological feasibility of NOMA at mmWave massive MIMO communications is not available. To address this, a simulation-based comparative study between NOMA and orthogonal multiple access (OMA) techniques for mmWave massive multiple-input and multiple-output (MIMO) communications is presented with performance discussions and identifying technology gaps. Throughout the paper, aspects of operating principles, fundamental features and technological feasibility of NOMA are discussed. Also, it is demonstrated that NOMA not only has good adaptability but also can outperform other OMA techniques for mmWave massive MIMO communications. Some foreseeable challenges and future directions on applying NOMA to B5G networks are also provided.

Download Full-text