[PDF] Top 20 Research on Spatial Characteristics of Wireless Channel in the Mine Tunnel

... characterize wireless propagation inside ...a tunnel can also be determined approximately by a ...the tunnel, the signal attenuation can be described as a continuous process for the whole propagation ... See full document

... mass-producible wireless sys- tems using millimeter waves, such as wireless local area networks (WLAN) systems ...wave wireless LAN systems, however, we need to know the reflection and transmission ... See full document

... provide wireless service in such ...whole tunnel [2]. Wireless communication has been considered a must in such environments because its propagation medium is ...Nevertheless, wireless system ... See full document

... in-body wireless communication ...propagation characteristics at UWB frequency is necessary in order to ensure reliable wireless communication links inside the human ...conduct research on ... See full document

... ABSTRACT: Channel has been introduced to achieve high data speed and better bit ...error. Channel estimation is of great importance in MIMO-OFDM system. Channel estimation is used to estimate the ... See full document

... active research area and beginning to gain strength in standardization for cellular, indoor and fixed wireless access ...each channel because the scattered environment causes these channels to be ... See full document

... The time domain pseudo-noise (PN) correlation method was adopted in the measurements. The measurement setup is shown in Fig. 1. In Keysight E8267D vector signal generator (VSG), a PN sequence with 511 chips was ... See full document

... iBurst wireless broadband system was initially de- veloped by ArrayComm in ...high-capacity spatial division multi- ple access (HC-SDMA) in September 2005 ... See full document

... on wireless technology, this paper designs a tunnel lighting intelligent control ...the characteristics of the tunnel and its actual functional requirements, coordinator, router and terminal ... See full document

... of wireless electromagnetic wave propagation, we study the propagation characteristics of wireless electromagnetic waves by ray tracing ...multipath channel, and the synthetic electromagnetic ... See full document

... Multipath propagation in indoor environments is strongly a ff ected by the dimensions of the environment and the density of furnishings. The influence of the environ- ment on the channel can be noticed in the power ... See full document

... of ± 31 Hz when the RX moves along the x-axis. This is because most of dominant incoming waves were the direct wave (+x direction) from the TX to the RX, the reflected wave (+x direction) from the wall behind the TX, and ... See full document

... ABSTRACT: Wireless networks are vulnerable to Sybil attacks, in which a malicious node poses as many identities in order to gain disproportionate ...on spatial variability of wireless channels exist, ... See full document

... tial channel models ...propagation channel modelling approaches with small scale and large scale channel parameters fitted to certain distributions based on MIMO mea- surement campaigns performed in ... See full document

... The data in Table 2 show that all 6 compositions detonated flawlessly. In terms of their physico-chemical characteristics, these compositions differ slightly. Compounds with a high percentage of aluminum showed ... See full document

... for Wireless Sensor Networks, along with their shortcomings in the underwater environment, and the fundamental challenges for the development of an efficient reliable transport layer protocol for ...in ... See full document

... appropriate channel models, for both on- and off-body scenarios ...on-body channel model [8], where body diffracted, and environ- ment and ground scattered components are taken into ... See full document

... Temporal and spatial variations in dissolved oxygen were observed in the studied stations. Peak value (5.12±0.13mg/l) was recorded in Station 5 and the lowest value (4.78±0.14 mg/l) in Station 1. The dissolved ... See full document

... If structural failure occurred in the ground control station, a self-disarm/self-destruct command could be built-in. This device could be used against incoming cruise missiles, aircraft, or observation platforms. If the ... See full document

... generation wireless communication tech- nology, the future 5G network will be an intelligent system with multi-service, multi-access technology, and multi-level ...plementary wireless services for ground ... See full document