Abstract
Massive multiple-input multiple-output (MIMO) transmission has attracted attention as a key technology for use in fifth-generation mobile communication systems. Multi-beam massive MIMO systems that apply beam selection in analog components and blind algorithms in digital components to eliminate the requirement for channel state information have been proposed as a method for reducing overhead. In this study, we developed an adaptive modulation scheme for implementing multi-beam massive MIMO and used computer simulation to compare it with digital and analog–digital hybrid beam-forming methods. The effectiveness of the proposed system was verified in a medium access control layer based on the IEEE802.11ac and frequency division duplex-LTE representative wireless communication standards.
Highlights
Cellular network data traffic volumes have increased significantly with the advent of smart devices
We propose a simple adaptive modulation scheme for multi-beam massive multiple-input multiple-output (MIMO) transmission based on amplitude correlation and received power
We evaluated the applicable modulation schemes in terms of the signal-to-interference noise ratio (SINR) and received power recorded on the uplink to simulate an adaptive modulation scheme
Summary
Cellular network data traffic volumes have increased significantly with the advent of smart devices. This approach was capable of appropriately performing beam-selection at a high signal-to-interference noise ratio (SINR) This method could be performed through signal processing using a simple configuration and was highly suitable for hybrid analog-digital massive MIMO. We propose a simple adaptive modulation scheme for multi-beam massive MIMO transmission based on amplitude correlation and received power. Under this method, an appropriate modulation scheme can be determined based on the relationship between amplitude correlation and the SINR. We describe the results of the performance evaluation of the proposed multi-beam massive MIMO method through the computer simulation of the IEEE802.11ac and FDD-LTE standard environments
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