Distributed Signal Processing and Sensing for Cell-free Networks: Advancing Towards 6G

Cell-free massive MIMO, integrating advanced communication and sensing capabilities, is emerging as a pivotal technology for 6G networks, promising uniform user experience, reduced latency, high energy efficiency, and superior sensing performance. This presentation provides an in-depth exploration of distributed signal processing, user-centric clustering, and multi-cell joint processing. In particular, we discuss uplink detection and downlink beamforming techniques, and present analytical and simulation results that demonstrate the superior performance of cell-free massive MIMO over centralized massive MIMO. We also delve into energy-efficient network design strategies, such as sleep mode and cluster zooming, and their significant impact on reducing energy consumption. Another focus is the application of cell-free massive MIMO for distributed sensing and integrated sensing and communication (ISAC), highlighting the effectiveness of these techniques in achieving high sensing accuracy and resolution. The presentation concludes that cell-free massive MIMO is a transformative technology for 6G, offering not only enhanced communication performance but also advanced sensing capabilities, making it a cornerstone for the future of wireless networks.