Figure 3From: Multi-user MIMO MMSE non-regenerative relaying using local channel state informationBER performance of RBD AF and OJ MMSE system with antenna configuration 2 , 2 ×4×4. RBD AF system transmits one data stream per UT using 4QAM and OJ MMSE transmits two data streams per UT using BPSK.Back to article page