Accurate Channel Model of Coaxial Cable Network and Its Application in Fault Location

2012 ◽  
Author(s):  
Xiaolong Zhang ◽  
Minming Zhang ◽  
Deming Liu
Keyword(s):  
Fault Location ◽  
Channel Model ◽  
Coaxial Cable ◽  
Cable Network

scholarly journals Three-Dimensional MIMO Channel Model with High-Mobility Wireless Communication Systems Using Leaky Coaxial Cable in Rectangular Tunnel

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Kai Zhang ◽  
Fangqi Zhang ◽  
Guoxin Zheng ◽  
Lei Cang
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Channel Model ◽  
Mimo System ◽  
Three Dimensional ◽  
High Mobility ◽  
Coaxial Cable ◽  
Mimo Channel ◽  
Wireless Communication Systems ◽  
Rectangular Tunnel

With the rapid development of high-mobility wireless communication systems, e.g., high-speed train (HST) and metro wireless communication systems, more and more attention has been paid to the wireless communication technology in tunnel-like scenarios. In this paper, we propose a three-dimensional (3D) nonstationary multiple-input multiple-output (MIMO) channel model with high-mobility wireless communication systems using leaky coaxial cable (LCX) inside a rectangular tunnel over the 1.8 GHz band. Taking into account single-bounce scattering under line-of-sight (LoS) and non-line-of-sight (NLoS) propagations condition, the analytical expressions of the channel impulse response (CIR) and temporal correlation function (T-CF) are derived. In the proposed channel model, it is assumed that a large number of scatterers are randomly distributed on the sidewall of the tunnel and the roof of the tunnel. We analyze the impact of various model parameters, including LCX spacing, time separation, movement velocity of Rx, and K-factor, on the T-CF of the MIMO channel model. For HST, the results of some further studies on the maximum speed of 360 km/h are given. By comparing the T-CF between the dipole MIMO system and the LCX-MIMO system, we can see that the performance of the LCX-MIMO system is better than that of the dipole MIMO system.

Travelling Wave Fault Location for Distribute Cable Network Based on Distributed Measurement

2013 ◽  
Vol 373-375 ◽  
pp. 976-980
Author(s):  
Yan Xu ◽  
Shi Qiu ◽  
Di Feng Shi ◽  
Guo Lin Huang
Keyword(s):  
Wave Speed ◽  
Fault Location ◽  
Travelling Wave ◽  
Transient Wave ◽  
Grounding Resistance ◽  
Location Method ◽  
Cable Network ◽  
Type D ◽  
Transmission Distance ◽  
Distributed Measurement

This template carries out a three-terminal accurate fault location method for distribute cable network. It is improved from type D principle fault location method. Radial distribution network is decomposed into T-type networks. A set of formulas based on three-terminal data can calculate fault distance and find fault branch. Only first transient wave heads is needed. Shorter transmission distance makes it more accurate to extract first wave heads with wavelet. The distributed measurement offers redundant transient voltage data. These data is fully used to improve location success rate and accuracy. The simulation result in ATP-EMTP shows that the location accuracy isnt influenced by wave speed, catadioptric wave, grounding resistance and initial fault phase angle.

Characterising micro-reflections in coaxial cable network

2017 ◽  
Vol 11 (8) ◽  
pp. 1043-1048 ◽  
Author(s):  
Marco Cazarotto ◽  
Renato da Rocha Lopes
Keyword(s):  
Coaxial Cable ◽  
Cable Network
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