The beam squint effect, which manifests in different steering matrices in different sub-bands,
has been widely considered a challenge in millimeter wave (mmWave) multi-input multi …

Channel estimation for millimeter wave (mmWave) systems is challenging due to their large
antenna arrays. Owing to the sparse scattering nature of the mmWave channel, channel …

A method for channel estimation in wideband massive Multiple-Input Multiple-Output
systems using hybrid digital analog architectures is developed. The proposed method is …

Reconfigurable intelligent surfaces (RISs) have the capability to change the wireless
environment smartly Considering the attenuation of subchannels and crowding users …

In this paper, we investigate the channel estimation problem for extremely large-scale multi-
input and multi-output (XL-MIMO) systems, considering the spherical wavefront effect …

This paper studies the channel estimation of millimeter-wave massive multiple-input multiple-
output orthogonal frequency division multiplexing systems with a wide bandwidth and a …

As a critical candidate technology for 5G-advanced and 6G, reconfigurable intelligent
surfaces (RIS) have received extensive attention from academia and industry. RIS has the …

In this paper, we propose a multipath extraction based uplink/downlink channel estimation
scheme for wideband massive multiple-input multiple-output (MIMO) systems, where …

Dear editor, To satisfy the growing demand for high data-rate communications, multiple-
input-multiple-output (MIMO) technology has been recognized as the most important and …

Integrated sensing and communications (ISAC) has attracted tremendous attention for the
future 6G wireless communication systems. To improve the transmission rates and sensing …