Results 101 to 110 of about 20,641 (239)
Indoor Massive MIMO Deployments for Uniformly High Wireless Capacity
, 2017 Providing consistently high wireless capacity is becoming increasingly important to support the applications required by future digital enterprises. In this paper, we propose Eigen-direction-aware ZF (EDA-ZF) with partial coordination among base stations
Baracca, Paolo +5 more
core +1 more source
Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim +4 more
wiley +1 more source
Coordinated air-ground scheduling for UAV-assisted cell-free massive MIMO
Dianxin kexue, 2022 Cell-free massive multiple-input multiple-output (MIMO) technology uses a large number of access points (AP) to provide efficient communication services for terrestrial users.However, massive APs and users increase the demand for channel state ...
Danhao DENG +3 more
doaj +2 more sources
IEEE Access, 2020 The irruption of the cell-free (CF) massive multiple-input multiple-output (MIMO) network topology has meant taking one step further the concept of massive MIMO as a means to provide uniform service in large coverage areas. A key property of massive MIMO
Alberto Alvarez Polegre +3 more
doaj +1 more source
Sum-Rate of Cell Free Massive MIMO Systems With Power Amplifier Non-Linearity
IEEE Access, 2021 Cell free (CF) massive multiple input multiple output (mMIMO) has been suggested as a key solution to meet the high data rate demands of future wireless communications.
Zahra Mokhtari, Rui Dinis
doaj +1 more source
Robust Spectral and Energy Efficiency Tradeoff for RIS‐Aided Multi‐User Communication
IET Communications, Volume 20, Issue 1, January/December 2026.In this work, an RIS‐aided multi‐user network with imperfect CSI is investigated. Correspondingly, we focus on balancing SE and EE through the collaborative design of the base station (BS)'s precoding matrix and the RIS's phase shifts, which consider the transmit power budget and the channel uncertainties constraints.
Xiandeng He, Yilin Wang, Shun Zhang
wiley +1 more source
Efficient DSP and Circuit Architectures for Massive MIMO: State-of-the-Art and Future Directions
, 2018 Massive MIMO is a compelling wireless access concept that relies on the use of an excess number of base-station antennas, relative to the number of active terminals.
Larsson, Erik G. +2 more
core +1 more source
, 2018 Cell-free massive multiple-input multiple-output (MIMO) is a system comprising a very large number of access points (hundreds or thousands of access points) and a relatively smaller number of active users (tens or hundreds of users) distributed over a large area. The access points use directly measured channel characteristics to jointly serve all users
openaire +2 more sources
A Massive Grant‐Free Random Access Scheme Based on Spectrum Sensing and Preamble Delay
IET Communications, Volume 20, Issue 1, January/December 2026.This paper introduces cognitive radio (CR) and preamble delay (PD) to reduce access collisions, together with non‐orthogonal multiple access (NOMA) to improve spectrum efficiency, and thus proposes an efficient CR‐NOMA‐PD‐based massive grant‐free random multiple access scheme.
Jing Zhang +5 more
wiley +1 more source
Optimal Bilinear Equalizer for Cell-Free Massive MIMO Systems Over Correlated Rician Channels [PDF]
IEEE Transactions on Signal ProcessingIn this paper, we explore the low-complexity optimal bilinear equalizer (OBE) combining scheme design for cell-free massive multiple-input multiple-output networks with spatially correlated Rician fading channels.
Zhe Wang +4 more
semanticscholar +1 more source