Spectral Efficiency Analysis of Downlink Cell-Free Massive MIMO

The rapid advancement of communication technologies is connecting the world faster than ever before. However, this has resulted in a scarcity of frequency spectrum as the available communication bandwidth is limited. To maximize data transmission rates while using a fixed bandwidth, a mechanism is needed to improve spectral efficiency. Distributed massive multiple input multiple output (MIMO) systems involve deploying a large number of transmitting antennas around user equipment (UEs) to achieve this goal. However, in cellular massive MIMO, signal interference around cell edges can present a problem. To address interference issues around cell edges in cellular massive MIMO, cell-free massive MIMO was introduced, which incorporates both massive MIMO and distributed MIMO principles. Cell-free massive MIMO is advantageous as it places users closer to access points (APs), enabling higher spectral efficiency. While cell-free massive MIMO improves spectral efficiency, signal processing techniques such as precoding are needed to maximize it further.

Auteur

Dr. Ram Sewak Singh, working as Associate Professor in Adama Science and Technology University, Adama, Ethiopia. He has published more than 54 research papers in SCI and reputed journals. His area of interest are wireless communication, Cognitive Radio and Bio-Signal processing with Machine learning.