Indoor UWB Communication System Model (original) (raw)
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UWB Channel Modeling Improvement in Indoor Line-of-Sight (LOS) Environments
Int'l J. of Communications, Network and System Sciences, 2010
Channel measurement and modeling are important issues when designing ultra wideband (UWB) communication systems. A Precise model of the channel response is inevitable for designing a UWB telecommunication system. In this article signal propagation in indoor environment and LOS condition is evaluated and the appropriate model of this scenario is presented. Parameters such as the power delay profile, mean excess delay, delay spread, "NP 10dB " are analyzed and simulated. Based on the analysis results, the proposed model is presented. This model is based on Two-cluster approach but its average power delay profile is described with power function and cluster time of the arrival is modeled by the modified exponential distribution. Finally UWB channel parameters of the proposed model, Saleh and Valenzuela (S-V) and Two-cluster models are compared. Measurement and simulation results show that considerable improvement for mean excess delay, delay spread and "NP 10dB " of proposed model comparing with S-V and Two-cluster models, this means the channel is better described, which mean the channel is described more precisely.
Ultra Wideband Channel Model for Indoor Environments
This paper presents an in-depth study of a UWB indoor radio channel between 1 and 9 GHz, which was used for the subsequent development of a new statistical UWB multipath channel model, focusing on short range indoor scenarios. The channel sounding process was carried out covering different indoor environments, such as laboratories, halls or corridors. A combination of new and traditional parameters has been used to accurately model the channel impulse response in order to perform a precise temporal estimation of the received pulse shape. This model is designed specifically for UWB digital systems, where the received pulse is correlated with an estimated replica of itself. The precision of the model has been verified through the comparison with measured data from equivalent scenarios and cases, and highly satisfactory results were obtained.
A Comprehensive Model for Ultrawideband
2005
This paper describes a comprehensive statistical model for UWB propagation channels that is valid for a frequency range from 3-10 GHz. It is based on measurements and simulations in the following environments: residential indoor, office indoor, built-up outdoor, industrial indoor, farm environments and body area networks. The model is independent of the used antennas. It includes the frequency dependence of the pathloss, as well as several generalizations of the Saleh-Valenzuela model, like mixed Poisson times of arrival and delay dependent cluster decay constants. The model can thus be used for realistic performance assessment of UWB systems. It was accepted by the IEEE 802.15.4a working group (WG) as standard model for evaluation of UWB system proposals.
Ultra wideband indoor radio channel models: preliminary results
2002
Knowledge of the signal propagation mechanisms in the channel is vital for the radio system design and the system performance analysis. However, currently published wideband or narrowband radio channel models do not offer spatial resolution high enough for the ultra wideband (UWB) applications and real channel measurements are needed. The preliminary UWB radio channel model for a selected radio link-configuration in an indoor environment is given.
A comprehensive model for ultrawideband propagation channels
GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
This paper describes a comprehensive statistical model for UWB propagation channels that is valid for a frequency range from 3-10 GHz. It is based on measurements and simulations in the following environments: residential indoor, office indoor, built-up outdoor, industrial indoor, farm environments, and body area networks. The model is independent of the used antennas. It includes the frequency dependence of the pathloss, as well as several generalizations of the Saleh-Valenzuela model, like mixed Poisson times of arrival and delay dependent cluster decay constants. The model can thus be used for realistic performance assessment of UWB systems. It was accepted by the IEEE 802.15.4a working group (WG) as standard model for evaluation of UWB system proposals.
A Comprehensive Standardized Model for Ultrawideband Propagation Channels
IEEE Transactions on Antennas and Propagation, 2000
A comprehensive statistical model is described for ultrawideband (UWB) propagation channels that is valid for a frequency range from 3-10 GHz. It is based on measurements and simulations in the following environments: residential indoor, office indoor, builtup outdoor, industrial indoor, farm environments, and body area networks. The model is independent of the used antennas. It includes the frequency dependence of the path gain as well as several generalizations of the Saleh-Valenzuela model, like mixed Poisson times of arrival and delay-dependent cluster decay constants. A separate model is specified for the frequency range below 1 GHz. The model can thus be used for realistic performance assessment of UWB systems. It was accepted by the IEEE 802.15.4a Task Group as standard model for evaluation of UWB system proposals. This paper also presents a critical assessment of the applicability of the model and possible generalizations and improvements
Analysis of ultra-wide band signal propagation in an indoor environment
Microwave and Optical Technology Letters, 2003
Ultra-wide band signal propagation in an urban environment is measured and studied. The basic concept is to develop, transmit and receive an extremely short duration burst of radio frequency energytypically a few tens of pico seconds to a few nanoseconds in duration. The resultant waveforms are extremely broadband, so much so that it is often difficult to determine an actual RF center frequency-thus the term "carrier-free" . In this paper, the indoor propagation of UWB signals inside an office room is studied. A simulation model of this system is compared with the actual test results.
ULTRA WIDEBAND RADIO CHANNEL MODELLING FOR INDOORS
2002
Most of the wideband radio channel models available today are not accurate enough for ultra wideband (UWB) applications occupying an extremely large bandwidth. In this paper, a procedure for indoor UWB radio channel measurements and modelling is presented. The example discussed here is based on the measurements carried out in the main building of the University of Oulu, Oulu, Finland. An average size lecture room was selected to represent typical university environment, and various radio links were measured for statistical variance. A radio frequency band from 2 to 8 GHz was covered by a vector network analyzer, and the measured S 21 data were inverse Fourier transformed to achieve the corresponding impulse responses.
2016
Over the coming decades, high-definition situation ally-aware networks have the potential to create revolutionary applications in the social, scientific, commercial, and military sectors. Ultra wide bandwidth (UWB) technology is a viable candidate for enabling accurate localization capabilities through time-of-arrival (TOA)-based ranging techniques. It is difficult to model indoor mobile radio channel because the channel parameters varies significantly. The indoor radio channel depends heavily on factors which include building structure, layout of rooms, and the type of construction materials used. In order to understand the effects of these factors on electromagnetic wave propagation, it is necessary to recall the three basic mechanisms of electromagnetic wave propagation -- reflection, diffraction, and scattering. In this paper three types of indoor radio propagation models are analyzed at ultra wideband frequency range and results are compared to select best suitable model for se...