Pilot reuse in the multi-cell massive multi-input multi-output system is investigated where
user groups with different priorities exist. Recent investigation on pilot reuse has revealed …

In massive multiple-input multiple-output (MIMO) systems, the effect of inter-user interference
and noise can be suppressed through simple signal processing techniques. However, pilot …

The pilot reuse issue in massive multi-input multi-output (MIMO) antenna systems with
interfering cells is closely examined. This paper considers scenarios where the ratio of the …

In distributed massive multi-input multi-output (DM-MIMO) system, the number of users
simultaneously served is greatly restricted if the pilots allocated for users are orthogonal. In …

Pilot contamination, caused by the reuse of pilots among interfering cells, remains a
significant obstacle that limits the performance of massive multi-input multi-output antenna …

The pilot contamination caused by sharing the non-orthogonal pilots among users is
considered to be a bottleneck of the massive multi-input multi-output (MIMO) systems. This …

Pilot reuse (PR) in each cell has been proposed to reduce the pilot overhead and improve
the throughput of massive multiple-input multiple-output systems. Since PR can introduce …

Pilot contamination due to pilot reuse in adjacent cells is a very serious problem in massive
multi-input multiple-output (MIMO) systems. Therefore, proper pilot allocation is essential for …

This letter proposes a partial-time-shifted pilot scheme to find a better tradeoff between the
user accommodation and orthogonality of pilots for the massive multiple-input multiple …

Pilot reuse caused by the limited number of orthogonal pilots brings serious pilot
contamination to cell-free multiple-input multiple-output system. This paper focuses on the …