Bit error rate 1 Cell-free 1 Cell-free communication system 1 Cells 1 Channel estimation 1 Codes (symbols) 1 Communications systems 1 Cost reduction 1 Cytology 1 Feedback control 1 Free communications 1 Iterative methods 1 Joint channel estimation and data detection (JED) Joint channel estimation and data detections 1 MIMO systems 1 Massive multi-user multiple-input multiple-output 1 Multiple inputs 1 Multiple outputs 1 Multiusers 1 Telecommunication repeaters 1 joint channel estimation and data detection (JED) 1 massive multi-user (MU) multiple-input multiple-output (MIMO) 1