Introduction to the Issue on Hybrid Analog–Digital Signal Processing for Hardware-Efficient Large Scale Antenna Arrays (Part II)

In this paper Sohrabi et al. consider downlink of massive MIIVIO system with 1 -bit resolution DACs. Firstly, a tight upper bound for symbol error rate (SER) with low -resolution DACs is derived. Then, in order to minimize the SER, the optimal QAM constellation range of QAM is calculated. Finally, a low complexity heuristic one -bit symbol level precoder is proposed for both single -user and multiuser scenarios. It is shown that 1 -bit precoding requires larger number of antennas to achieve the same performance compared to infinite resolution phase shifters.