Channel estimation in time division duplexing (TDD)‐based massive multiple‐input multiple‐
output (MIMO) systems is heavily hampered by the pilot contamination, which constitutes a …

In this paper, an effective direction-of-arrival (DOA) and range estimations method for mixed
far-field and near-field non-circular sources is proposed based on a large centrosymmetric …

A system for transmitting pilot signals has first signal processing circuitry for generating a
pilot signal at a transmitting unit. An MLO modulation circuit modulates the pilot signal using …

This paper studies the uplink and downlink achievable rates for large-scale multiple-input-
multiple-output (MIMO) systems, assuming perfect and imperfect channel state information …

Massive multiple-input multiple-output (MIMO) significantly improves the spectral efficiency
and energy efficiency of the systems. In this paper, a channel estimation based on pilot …

Channel estimation in time division duplexing (TDD)-based massive multiple-input multiple-
output (MIMO) systems is heavily hampered by the pilot contamination, which constitutes a …