Massive multiple-input-multiple-output (MIMO) and millimeter wave have been adopted as
the enabling technologies for the 5G and beyond 5G (B5G) systems. A challenging problem …

In this paper, we design an uplink/downlink channel estimation method for millimeter wave
(mmWave) massive multiple-input multiple-output (MIMO) systems and investigate the …

Millimeter-wave (mm-wave) massive MIMO with lens antenna array can considerably reduce
the number of required radio-frequency (RF) chains by beam selection. However, beam …

By employing the lens antenna array, beamspace MIMO can utilize beam selection to
reduce the number of required RF chains in mmWave massive MIMO systems without …

A large-scale antenna array introduces the innegligible propagation delay for a received
signal across the array aperture in addition to a phase rotation. If the delay is comparable to …

Accurate beamspace channel estimation is critical in wideband millimeter-wave (mmWave)
massive multiple-input multiple-output (MIMO) communication systems. However, the beam …

In this paper, we develop two high-resolution channel estimation schemes based on the
estimating signal parameters via the rotational invariance techniques (ESPRIT) method for …

This paper proposes a novel direction-of-arrival (DOA)-aided channel estimation for a hybrid
millimeter-wave (mm-wave) massive multiple-input multiple-output system with a uniform …

Combination of millimeter wave (mmWave) and massive multiple input multiple output
(MIMO) forms a promising technology for future sixth generation networks. As the number of …

In this paper, a framework of beamspace channel estimation in millimeter wave massive
MIMO system is proposed. The framework includes the design of hybrid precoding and …