MASSIVE MIMO FOR NEXT GENERATION WIRELESS SYSTEMS

MASSIVE MIMO FOR NEXT GENERATION WIRELESS SYSTEMS

January 23, 2014 | Erik G. Larsson, ISY, Linköping University, Sweden Ove Edfors, Lund University, Sweden Fredrik Tufvesson, Lund University, Sweden Thomas L. Marzetta, Bell Labs, Alcatel-Lucent, USA
The paper "Massive MIMO for Next Generation Wireless Systems" by Erik G. Larsson, Ove Edfors, Fredrik Tufvesson, and Thomas L. Marzetta discusses the potential and challenges of Massive MIMO (also known as Large-Scale Antenna Systems, Very Large MIMO, Hyper MIMO, Full-Dimension MIMO, and ARGOS). Multi-user MIMO (MU-MIMO) offers significant advantages over conventional point-to-point MIMO, including increased data rates, enhanced reliability, improved energy efficiency, and reduced interference. However, traditional MU-MIMO systems are not scalable due to the limited number of service antennas compared to active terminals. Massive MIMO breaks this limitation by using a much larger number of service antennas (hundreds or even thousands) compared to active terminals (tens or hundreds). This approach allows for significant improvements in throughput and radiated energy efficiency, as well as reduced latency, simplified media access control (MAC) layer, and robustness against intentional jamming. The technology relies on spatial multiplexing and coherent processing of signals from all antennas, which can be achieved through time-division duplex (TDD) operation. The paper highlights the benefits of Massive MIMO, including: - Increased capacity and improved energy efficiency. - Use of inexpensive, low-power components. - Reduced latency on the air interface. - Simplified multiple-access layer. - Increased robustness against interference. However, challenges such as channel reciprocity, pilot contamination, and radio propagation conditions must be addressed. The authors also discuss the need for fast and distributed coherent signal processing, low-cost hardware, and efficient channel characterization. They emphasize the importance of prototype development and ongoing research to overcome these challenges and fully realize the potential of Massive MIMO.The paper "Massive MIMO for Next Generation Wireless Systems" by Erik G. Larsson, Ove Edfors, Fredrik Tufvesson, and Thomas L. Marzetta discusses the potential and challenges of Massive MIMO (also known as Large-Scale Antenna Systems, Very Large MIMO, Hyper MIMO, Full-Dimension MIMO, and ARGOS). Multi-user MIMO (MU-MIMO) offers significant advantages over conventional point-to-point MIMO, including increased data rates, enhanced reliability, improved energy efficiency, and reduced interference. However, traditional MU-MIMO systems are not scalable due to the limited number of service antennas compared to active terminals. Massive MIMO breaks this limitation by using a much larger number of service antennas (hundreds or even thousands) compared to active terminals (tens or hundreds). This approach allows for significant improvements in throughput and radiated energy efficiency, as well as reduced latency, simplified media access control (MAC) layer, and robustness against intentional jamming. The technology relies on spatial multiplexing and coherent processing of signals from all antennas, which can be achieved through time-division duplex (TDD) operation. The paper highlights the benefits of Massive MIMO, including: - Increased capacity and improved energy efficiency. - Use of inexpensive, low-power components. - Reduced latency on the air interface. - Simplified multiple-access layer. - Increased robustness against interference. However, challenges such as channel reciprocity, pilot contamination, and radio propagation conditions must be addressed. The authors also discuss the need for fast and distributed coherent signal processing, low-cost hardware, and efficient channel characterization. They emphasize the importance of prototype development and ongoing research to overcome these challenges and fully realize the potential of Massive MIMO.
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