scholarly journals The Development of FPGA-based Wireless Channel Simulator using LabVIEW

2013 ◽  
Vol 64 (3) ◽  
Author(s):  
Nor Aswani Mamat ◽  
Razali Ngah ◽  
Uche A.K Chude Okonkwo ◽  
Muhamad Asmi Ramli
Keyword(s):  
Wireless Communication ◽  
Doppler Shift ◽  
Channel Model ◽  
Wireless Channel ◽  
Communication Link ◽  
Good Communication ◽  
Time Frequency ◽  
Channel Simulation ◽  
Increasing Demand ◽  
Channel Simulator

The development of channel model for wireless communication system is currently becoming important to fulfill the entire user’s requirements and increasing demand where to provide a good communication link between the users at everywhere and anytime. An accurate techniques or operator is needed to model a very flexible channel for wireless communication application. Previous channel model is developed based on the time-frequency operator which is limited to Narrowband signaling. This operator uses Doppler shift to account for mobility in propagation space. This paper proposes a Wideband channel model which is valid for all kind of signaling and conditions. Mathematical channel model is used to represent a generic channel simulator which is implemented as channel simulator. The development and measurement of channel simulator is using LabVIEW. The LabVIEW can be used as basic software and can be turned into hardware part by connecting to other devices for real-time channel simulation. The illustration and snapshot of the channel simulator modeling in term of LabVIEW code program are presented.

The Wireless Network Routing Protocols and Data Communication Methods for Multiple Sensor Information Used in Mining Mechanical

2014 ◽  
Vol 621 ◽  
pp. 288-293
Author(s):  
Meng Wang ◽  
Xin Yu Tang ◽  
Wen Xiao Zeng ◽  
Jun Lin Zhou ◽  
Rong Hui Zhang
Keyword(s):  
Wireless Communication ◽  
Wireless Network ◽  
Channel Model ◽  
Data Communication ◽  
Network Routing ◽  
Wireless Channel ◽  
Wireless Sensor ◽  
Transmission Model ◽  
Network Node ◽  
Research Results

In view of the development of wireless sensor system data transmission model in mine mechanical, we construct a ground reflection model of double path combined with the actual background demand based on the analysis of the wireless network routing protocol. Firstly, we put forward the selection strategy on wireless communication transmission power of multiple information sensor nodes. To build a data communication mode, we proposed the selection and evaluation method of network parameters based on graph theory. In consideration of the wireless channel model, combined with the initial random layout problem of network node, we explore whether to be neighbors between any two nodes arranged at random and the constraint relationship of wireless communication distance between nodes. Finally, we make up a dynamic routing selection algorithm with a view to dynamic nodes, and conduct the simulation analysis and experiment design. The research results show that with the increase of the random movement speed about network nodes, the process of depleting the energy of the nodes in the wireless sensor network speeds up, which explain the protocol given in the paper requires more energy to cope with the problem that the network topology changes frequently because of the random motion of nodes in network. The research results provide a reference to the wireless network node research and design in the electromechanical integration design.

The Experimental Results Analysis of Shortwave Channel Reciprocity

2013 ◽  
Vol 339 ◽  
pp. 419-424
Author(s):  
Hua Ping Lu ◽  
Ai Min Zhu ◽  
Ding Jun Hu ◽  
Lei Zhang
Keyword(s):  
Real Time ◽  
Doppler Shift ◽  
Experimental Results ◽  
Scattering Function ◽  
Time Frequency ◽  
Channel Simulation ◽  
Frequency Selection ◽  
The Mean ◽  
Shortwave Propagation ◽  
Channel Reciprocity

The shortwave channel reciprocity is important for shortwave channel simulation and shortwave real-time frequency-selection. In order to study the reciprocity of shortwave channel. This paper analyzed experimental results on shortwave reciprocity between Wuhan and Wanning in March 2009, the experimental results obtained by the WIOBSS. The experimental results of the contrary paths shortwave propagation displays that the mean difference value of MUF is small, and the scattering function and Doppler shift are similarsim. Removing the inaccuracy of measurement, we can get that the two propagation paths basically satisfy the reciprocity.

scholarly journals QPSK MMW Wireless Communication System Based On p-i-n InGaAs Photomixer

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1182
Author(s):  
Asemahegn Wudu ◽  
Daniel Rozban ◽  
Amir Abramovich
Keyword(s):  
Wireless Communication ◽  
Fiber Optics ◽  
Horn Antenna ◽  
High Data Rate ◽  
Communication Link ◽  
High Data ◽  
W Band ◽  
Increasing Demand ◽  
Security Surveillance ◽  
Vector Signal

Millimeter-wave (MMW) frequencies (30–300 GHz), located between the microwave and infrared (IR), are promising solutions for the increasing demand of high data rate applications, UHD multimedia, HD gaming, security, surveillance, and the emergence of 5G Internet of Things (IoT). In this article, we experimentally demonstrated MMW wireless communication link using InGaAs p-i-n photomixer and commercially available telecom components at W-band (75–110 GHz). The photomixer was excited by two 1.5 µm lasers via standard telecom fiber optics, to generate frequency difference at W-band. QPSK modulated signal transmitted by the photomixer and received horn antenna integrated MMW mixer and analyzed using a spectrum analyzer and Vector Signal Analyzer (VSA) software.

scholarly journals Design of Wideband MIMO Car-to-Car Channel Models Based on the Geometrical Street Scattering Model

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Nurilla Avazov ◽  
Matthias Pätzold
Keyword(s):  
Correlation Function ◽  
Communication Systems ◽  
Channel Model ◽  
Reference Model ◽  
Multiple Input Multiple Output ◽  
Measurement Data ◽  
Scattering Model ◽  
Time Frequency ◽  
Comparison Results ◽  
Channel Simulator

We propose a wideband multiple-input multiple-output (MIMO) car-to-car (C2C) channel model based on the geometrical street scattering model. Starting from the geometrical model, a MIMO reference channel model is derived under the assumption of single-bounce scattering in line-of-sight (LOS) and non-LOS (NLOS) propagation environments. The proposed channel model assumes an infinite number of scatterers, which are uniformly distributed in two rectangular areas located on both sides of the street. Analytical solutions are presented for the space-time-frequency cross-correlation function (STF-CCF), the two-dimensional (2D) space CCF, the time-frequency CCF (TF-CCF), the temporal autocorrelation function (ACF), and the frequency correlation function (FCF). An efficient sum-of-cisoids (SOCs) channel simulator is derived from the reference model. It is shown that the temporal ACF and the FCF of the SOC channel simulator fit very well to the corresponding correlation functions of the reference model. To validate the proposed channel model, the mean Doppler shift and the Doppler spread of the reference model have been matched to real-world measurement data. The comparison results demonstrate an excellent agreement between theory and measurements, which confirms the validity of the derived reference model. The proposed geometry-based channel simulator allows us to study the effect of nearby street scatterers on the performance of C2C communication systems.

scholarly journals A Review and Comprehensive Study of Wireless Channel in Mobile Communication System: Fading Phenomena and Estimation

2019 ◽  
Vol 12 (1) ◽  
pp. 25-30
Author(s):  
Awwab Q. Jumaah
Keyword(s):  
Wireless Communication ◽  
Channel Estimation ◽  
Communication Systems ◽  
Channel Model ◽  
Computational Cost ◽  
Wireless Channel ◽  
Mimo Channel ◽  
Wireless Communication Systems ◽  
Transmission Estimation ◽  
Fading Phenomena

In wireless communication systems, the channel estimation problem has been played an essential challenge to accurately retrieve the channel state information (CSI) such that reliable communication & wide coverage can be provided. Due to the improvement and rapid growth of communication systems and in order to maintain a reliable data transmission, estimation of CSI has become necessary. This in turn results, precise receiver demodulation, accurate decoding, and equalization processes. This paper gives a survey on a fading phenomena and a comprehensive review of the recent works that have already been done and studied related to the problem of estimating channel parameters in wireless communication systems. Varieties of best channel estimation techniques that have been recently evolved are explored. Comparison between them in terms of computational cost, simplicity and appropriateness conditions is also discussed. This paper also provides a basic introduction of wireless channel model, SIMO and MIMO channel.

Analysis of Inter-Satellite Optical Wireless Communication System

2017 ◽  
Vol 7 (10) ◽  
pp. 10
Author(s):  
Rajbir Singh
Keyword(s):  
Wireless Communication ◽  
Optical Networks ◽  
Data Transmission ◽  
High Speed ◽  
Open Space ◽  
Communication Link ◽  
Optical Wireless Communication ◽  
Optical Wireless ◽  
High Speed Data ◽  
Speed Data Transmission

Optical networks are bandwidth efficient networks are used for long haul communication providing seamless data transfer. For high speed data transmission in open space between different satellites, Inter-satellite Optical wireless communication (IsOWC) is widely used .In this paper we have evaluated the performance of IsOWC communication link for high speed data transmission .The performance of the system is evaluated on the basis of qualitative parameters such as Q-factor and BER using optisystem simulator.

A Code-Domain, In-Band, Full-Duplex Wireless Communication Link With Greater Than 100-dB Rejection

2021 ◽  
Vol 69 (1) ◽  
pp. 955-968
Author(s):  
Ahmed Hamza ◽  
Aravind Nagulu ◽  
Alfred Festus Davidson ◽  
Jonathan Tao ◽  
Cameron Hill ◽  
...  
Keyword(s):  
Wireless Communication ◽  
Full Duplex ◽  
Communication Link ◽  
Code Domain
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