Pilot contamination is one of the main limiting factors for the performance of massive MIMO
systems. In this paper, two novel pilot allocation schemes are proposed to mitigate the pilot …

Many researches demonstrate that cell-edge users are more susceptible to pilot
contamination than the cell-center users in massive MIMO systems. Therefore, this paper …

Massive multiple-input multiple-output (MIMO) is a crucial technology platform for the fifth-
generation of cellular systems (5G). However, massive MIMO systems are affected by pilot …

Coordinated linear transmit-receive processing with beam selection is a method to utilize all
degrees of freedom available in multiuser multiple-input multiple-output (MIMO) cellular …

Massive multiple-input multiple-output (MIMO) systems are expected to achieve substantial
gains in frequency efficiency compared to conventional MIMO systems. However, these …

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 …

The performance of massive Multi-input Multi-output (MIMO) system is limited by pilot
contamination, due to the pilots with similar energy can be received by users at the same …

Pilot contamination affects the system performance of time division duplex (TDD) massive
multiple-input multiple-output (MIMO) systems, and many pilot allocation methods are …

Pilot contamination occurs when cells simultaneously transmit the same pilot sequences,
creating interference. Unsynchronizing the pilots can reduce pilot contamination, but it can …

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 …