Results 81 to 90 of about 41,333 (196)
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
Pilot Decontamination in CMT-based Massive MIMO Networks
, 2014 Pilot contamination problem in massive MIMO networks operating in time-division duplex (TDD) mode can limit their expected capacity to a great extent.
Aminjavaheri, Amir +4 more
core +1 more source
International Journal of Satellite Communications and Networking, Volume 44, Issue 1, Page 17-33, January/February 2026.In this paper, we investigate the application of signal‐to‐leakage‐plus‐noise ratio (SLNR) beamforming to low Earth orbit non‐terrestrial networks. The SLNR criterion aims at maximizing the received desired signal power for each user while minimizing the overall interference power caused by each user to all other co‐channel receivers. We show that such
M. Rabih Dakkak +3 more
wiley +1 more source
, 2017 Massive Multiple-input Multiple-output (MIMO) adaption is one of the primary evolving objectives for the next generation high speed train (HST) communication system.
Chen, Xuhong, Fan, Pingyi
core +1 more source
Fern spore dispersal: A methodological review and experimental field study
Applications in Plant Sciences, Volume 14, Issue 1, January-February 2026.Abstract Spore dispersal is one of the most important but perhaps the least investigated and understood processes in determining the geographical distribution of fern species. After a methodological review of the aerobiology of fern spores, we examined the impact of spore characteristics and meteorological factors on their airborne dispersal.
Felipe Gómez‐Noguez +6 more
wiley +1 more source
Distributed Compressive CSIT Estimation and Feedback for FDD Multi-user Massive MIMO Systems
, 2014 To fully utilize the spatial multiplexing gains or array gains of massive MIMO, the channel state information must be obtained at the transmitter side (CSIT).
Lau, Vincent K. N., Rao, Xiongbin
core +2 more sources
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
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
Joint user grouping and antenna selection based massive MIMO beamforming
Dianxin kexue, 2016 In massive MIMO systems，when the number of users is larger as that of antennas at base station（BS），the various channels may be significantly different.A new zero-forcing beamformer design algorithm was proposed based on joint user grouping and antenna ...
Qian WANG +3 more
doaj +2 more sources
An Energy‐Tiered Clustering‐Based Blind Detector for RIS‐RSM Systems
IET Communications, Volume 20, Issue 1, January/December 2026.This paper proposes an energy‐tiered structure initialization (ETSI) algorithm for blind detection in reconfigurable intelligent surface (RIS)‐assisted spatial modulation systems. By decomposing the modulation constellation into multiple energy tiers and leveraging structured prototype initialization with tier‐normalized refinement, ETSI effectively ...
Lijuan Zhang +2 more
wiley +1 more source