Massive Near-Field Spatial Multiplexing: Higher Capacity Without More Bandwidth
The demand for wireless data traffic is steadily growing, thus, the expanding network capacity must remain the center point for 6G network development. In the 5G era, we have witnessed how the attempts to use more spectrum in mmWave bands have largely failed. The latest example is South Korea, which closed its networks in 2023. As we are running out of spectrum suitable for wide-area connectivity, we must search for alternative ways to cater to the exponential traffic growth. In this talk, we will have a look at whether enhancement in the multiple-input multiple-output (MIMO) technology can lead the way. The concepts of radiative near-field propagation, spherical wavefronts, finite-depth beamforming, and spatial degrees of freedom will be explained and connected to the physical antenna array dimensions. We will conclude on whether massive spatial multiplexing is an untapped resource that can boost the capacity of 6G networks, as well as what MIMO functionality we can expect in the first 6G deployments.
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- Delhi, Delhi
- India
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Prof. Emil Björnson
Massive Near-Field Spatial Multiplexing: Higher Capacity Without More Bandwidth
The demand for wireless data traffic is steadily growing, thus, the expanding network capacity must remain the center point for 6G network development. In the 5G era, we have witnessed how the attempts to use more spectrum in mmWave bands have largely failed. The latest example is South Korea, which closed its networks in 2023. As we are running out of spectrum suitable for wide-area connectivity, we must search for alternative ways to cater to the exponential traffic growth. In this talk, we will have a look at whether enhancement in the multiple-input multiple-output (MIMO) technology can lead the way. The concepts of radiative near-field propagation, spherical wavefronts, finite-depth beamforming, and spatial degrees of freedom will be explained and connected to the physical antenna array dimensions. We will conclude on whether massive spatial multiplexing is an untapped resource that can boost the capacity of 6G networks, as well as what MIMO functionality we can expect in the first 6G deployments.
Biography:
Emil Björnson is a Professor of Wireless Communication at the KTH Royal Institute of Technology, Stockholm, Sweden. He is an IEEE Fellow, Digital Futures Fellow, and Wallenberg Academy Fellow. He has a podcast and YouTube channel called Wireless Future. His research focuses on multi-antenna communications and radio resource management, using methods from communication theory, signal processing, and machine learning. He has authored four textbooks and published a large amount of simulation code. He has received the 2018 and 2022 IEEE Marconi Prize Paper Awards in Wireless Communications, the 2019 EURASIP Early Career Award, the 2019 IEEE Communications Society Fred W. Ellersick Prize, the 2019 IEEE Signal Processing Magazine Best Column Award, the 2020 Pierre-Simon Laplace Early Career Technical Achievement Award, the 2020 CTTC Early Achievement Award, the 2021 IEEE ComSoc RCC Early Achievement Award, and the 2023 IEEE Communications Society Outstanding Paper Award. His work has also received six Best Paper Awards at conferences.