  Large-scale multiple-antenna systems with large bandwidth are fundamental for
future wireless communications, where the base station employs a large antenna
array. In this scenario, one problem faced is the large energy consumption as
the number of receive antennas scales up. Recently, low-resolution
analog-to-digital converters (ADCs) have attracted much attention.
Specifically, 1-bit ADCs are suitable for such systems due to their low cost
and low energy consumption. This paper considers uplink large-scale
multiple-antenna systems with 1-bit ADCs on each receive antenna. We
investigate the benefits of using oversampling for channel estimation in terms
of the mean square error and symbol error rate performance. In particular,
low-resolution aware channel estimators are developed based on the Bussgang
decomposition for 1-bit oversampled systems and analytical bounds on the mean
square error are also investigated. Numerical results are provided to
illustrate the performance of the proposed channel estimation algorithms and
the derived theoretical bounds.
