Results 31 to 40 of about 847,355 (293)

Spreading speeds of epidemic models with nonlocal delays

Mathematical Biosciences and Engineering, 2019
We estimate the spreading speeds in diffusive epidemic models with nonlocal delays, nonlinear incidence rate and constant recruitment rate. The purpose is to model the process that the infective invades the habitat of the susceptible, and they coexist eventually. In order to focus on our idea, a system with a nonlinear incidence rate is firstly studied,
Guo Lin, Shuxia Pan, Xiang-Ping Yan
openaire   +4 more sources

Measurement-Based Massive MIMO Polarimetric Channel Characterization in Outdoor Environment

IEEE Access, 2019
This paper introduces a measurement campaign to investigate the characteristics of massive multiple-input multiple-output (MIMO) channels in both line-of-sight (LoS) and obstructed LoS suburban outdoor environments.
Le Hao, Jose Rodriguez-Pineiro, Xuefeng Yin, Haowen Wang   +3 more
doaj   +1 more source

Influence of Vegetation on the Outdoor-to-Indoor Mobile Radio Propagation in 700 MHz Band

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
Starting from outdoor transmission, crossing vegetation, the wideband and narrowband characterization of the indoor mobile radio channel in the 700 MHz band is obtained from experiments carried out in the indoor environment of the Engineering building at
Leonardo G. Ribeiro, Leni J. Matos, Pedro V. G. Castellanos, Matheus B. Moura, Vitor L. G. Mota, Wyliam D. T. Meza   +5 more
doaj   +1 more source

Experimental Evaluation of the Mobile Radio Channel Capacity in the 2.48 GHz Band

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper deals with the effect of the Single-Input Multiple-Output spatial diversity on the OFDM mobile radio signal propagating in an urban channel.
Uwe R. Villanueva, Gláucio L. Siqueira, Leni J. Matos, Pedro V. G. Castellanos, Leonardo H. Gonsioroski   +4 more
doaj   +1 more source

On Max-SINR Receiver for Hexagonal Multicarrier Transmission Over Doubly Dispersive Channel

, 2013
In this paper, a novel receiver for Hexagonal Multicarrier Transmission (HMT) system based on the maximizing Signal-to-Interference-plus-Noise Ratio (Max-SINR) criterion is proposed. Theoretical analysis shows that the prototype pulse of the proposed Max-
Xia, Xiaochen, Xu, Kui, Xu, Youyun, Zhang, Dongmei   +3 more
core   +1 more source

A study of antenna array based multipath propagation phenomenon in LAS-CDMA standard [PDF]

, 2004
Throughout the history of wireless communications, spatially diversity's antenna array system has being important in improving the radio link between wireless users.
Ismail, Mahamod, Jamuar, Sudhanshu Shekhar, Khatun, Sabira, Mohd Ali, Borhanuddin, Ng, Chee Kyun   +4 more
core   +1 more source

Measurement and modeling of wireless body area network propagation characteristics of indoor environment at 10 GHz

物联网学报, 2022
To explore the feasibility of high-frequency in indoor wireless body area network (WBAN) communication, the propagation characteristics of 10 GHz for WBAN in indoor scenario was given.Based on a large number of measurement data, the path loss, the shadow
Qin YANG, Lihua YANG, Lulu REN, Shanhu HUANG, Jiahuan LIU   +4 more
doaj  

Measurement-Based Characterization of 39 GHz Millimeter-Wave Dual-Polarized Channel Under Foliage Loss Impact

IEEE Access, 2019
This paper presents a measurement-based analysis of wideband 39 GHz millimeter wave (mm-wave) dual-polarized propagation channel under the impact of foliage presence between a transmitter (Tx) and a receiver (Rx).
Yejian Lv, Xuefeng Yin, Chao Zhang, Haowen Wang   +3 more
doaj   +1 more source

Delay spread and coherence bandwidth in reverberation chamber

Electronics Letters, 2008
The reverberation chamber becomes an attractive tool for simulating a multipath environment. Starting from the definition of the delay spread and of the coherence bandwidth, analytical expressions in terms of the Q-factor of the room are determined and compared with those of the power density decay factor and of the mode bandwidth, allowing a better ...
Delangre, O., de Doncker, P., Lienard, M., Degauque, Pierre   +3 more
openaire   +2 more sources

An Empirical Air-to-Ground Channel Model Based on Passive Measurements in LTE [PDF]

, 2019
In this paper, a recently conducted measurement campaign for unmanned-aerial-vehicle (UAV) channels is introduced. The downlink signals of an in-service long-time-evolution (LTE) network which is deployed in a suburban scenario were acquired.
Ai, Bo, Cai, Xuesong, Pedersen, Gert F., Pérez Yuste, Antonio, Rodríguez-Piñeiro, José, Wang, Nanxin, Yin, Xuefeng   +6 more
core   +2 more sources