Analog Beamforming in mmWave massive MIMO systems with 1-bit ADC

This document describes a millimeter wave (with carriers about 60 GHz) massive MIMO (Multiple Input Multiple Output) communication system with analog beamforming at the receiver. It is only considered the uplink communication between K single-antenna users, which transmit with QPSK modulation, and a massive antenna grouping Base Station (BS). The BS makes use of a beamformer as a previous step to quantize the received signal, in order to be able to select the transmission made by a single user, instead all the transmission added. It also uses a 1-bit Analog-to-Digital converter (ADC) to quantise the received signal, which is simple and more power efficient than ADC's of larger order. In order to evaluate the performance of the system and be able to compare the benefits of using analog beamforming, we will calculate the Symbol Error Rate (SER) and the Mutual Information between the sent and received symbols. Then we will compare different receive filters and different lengths of the pilot sequences in the channel estimation. It is also shown two methods to evaluate the performance metrics, by means of Monte Carlo simulations, and an analytical approach