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Investigation and Comparison of 5G Channel Models: From Qua DRi Ga, NYUSIM,and MG5G Perspectives

Chinese Journal of Electronics 2022年第1期31卷 1-17页

作者： PANG Lihua ZHANG Jin ZHANG Yang HUANG Xinyi CHEN Yijian LI Jiandong School of Communication and Information Engineering Xi'an University of Science and Technology State Key Laboratory of Integrated Service Networks Xidian University National Mobile Communications Research Laboratory Southeast University Algorithm Department ZTE Corporation

This paper investigates and compares three channel models for the fifth generation(5 G) wireless communications: the quasi deterministic radio channel generator(Qua DRi Ga), the NYUSIM channel simulator model developed by New York University, and the more general 5 G(MG5 G) channel model. First, the characteristics of the modeling processes of the three models are introduced from the perspective of model ***, the small-scale parameter modeling strategies of the three models are compared from space/time/frequency domains as well as polarization aspect. In particular, the drifting of small-scale parameters is introduced in ***, through the simulation results of angular power spectrum, Doppler power spectrum density, temporal autocorrelation function, power delay profile, frequency correlation function, channel capacity, and eigenvalue distribution, the three models are comprehensively investigated. According to the simulation results, we clearly analyze the impact of the modeling strategy on the three channel models and give certain evaluations and suggestion which lay a solid foundation for link and system-level simulations for 5 G transmission algorithms.

关键词： model framework MG5G Perspectives quasideterministic radio channel generator channel capacity QuaDRiGa fifth generation wireless communications general 5G channel model 5G transmission algorithms wireless channels NYUSIM channel simulator model frequency correlation function 5G mobile communication power delay profile eigenvalue distribution eigenvalues and eigenfunctions channel models temporal autocorrelation function small-scale parameter angular power spectrum Doppler power spectrum density

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Channel modelling for vehicle-to-vehicle MIMO communications in geometrical rectangular tunnel scenarios

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IET COMMUNICATIONS 2020年第19期14卷 3420-3427页

作者： Zhou, Jie Chen, Zhen Jiang, Hao Kikuchi, Hisakazu Nanjing Univ Informat Sci & Technol Dept Elect & Elect Engn Nanjing 210044 Peoples R China Niigata Univ Dept Elect Elect Engn Niigata 9502181 Japan

This study presents a multiple-input multiple-output (MIMO) statistical channel model for vehicle-to-vehicle (V2V) line-of-sight (LOS) and non-LOS mobile communication system in a rectangular tunnel environment. In order to improve the V2V communication system performance, the authors introduced the elevation and azimuth angles in three-dimensional modelling based on the original literature. In the proposed reference channel model, the single-bounced scattering propagation path of electromagnetic signals is considered and it is assumed that the scatterers are randomly distributed on the rectangular tunnel wall. Starting from the statistical physical channel model, the time-variant transfer functions are derived. Thereafter, the analytical expressions of the space-time-frequency cross-correlation function, the space cross-correlation function, the temporal autocorrelation function, the frequency correlation function, and MIMO channel capacity are derived. The influence of model parameters on the performance of the V2V communication system is also analysed. This work provides an innovative approach to channel modelling in a rectangular tunnel mobile communication environment.

关键词： tunnels MIMO communication wireless channels mobile radio channel capacity vehicular ad hoc networks electromagnetic wave propagation electromagnetic wave scattering vehicle-to-vehicle MIMO communications geometrical rectangular tunnel scenarios multiple-input multiple-output statistical channel model V2V communication system reference channel model scattering propagation path rectangular tunnel wall time-variant transfer functions space-time-frequency cross-correlation function space cross-correlation function temporal autocorrelation function frequency correlation function MIMO channel capacity rectangular tunnel mobile communication environment

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A 3D Wideband GBSM for THz Communications in Indoor Scenarios 11

A 3D Wideband GBSM for THz Communications in Indoor Scenario...

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11th IEEE International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Huang, Yiling Chang, Hengtai Huang, Jie Zhang, Wensheng Sun, Jian Wang, Cheng-Xiang Shandong Univ Sch Informat Sci & Engn Shandong Prov Key Lab Wireless Commun Technol Qingdao 266237 Peoples R China Southeast Univ Sch Informat Sci & Engn Natl Mobile Commun Res Lab Nanjing 210096 Peoples R China Purple Mt Labs Nanjing 211111 Peoples R China

ISBN: (纸本)9781728135557

In this paper, we propose a three-dimensional (3D) wideband reference regular-shaped geometry-based stochastic model (RS-GBSM) at terahertz (THz) bands for indoor scenarios. The corresponding sum-of-sinusoid (SoS) simulation model is established to verify the reference model. The proposed model combines a two-sphere model with a elliptic cylinder model, where the received signal is considered as a summation of the line-of-sight (LoS), single-bounce (SB), and double-bounce (DB) components. The von-Mises-Fisher (VMF) distribution is applied to the expressions of azimuth and elevation angles to depict the distribution of scatterers. Based on the proposed THz RS-GBSM, the power delay profile (PDP) and channel transfer function (CTF) are obtained. The delay spread and frequency correlation function (FCF) are investigated. The simulation results demonstrate the validity of the proposed model to describe indoor THz channels.

关键词： THz channel modeling GBSM power delay profile channel transfer function frequency correlation function

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A Nonisovelocity Geometry-Based Underwater Acoustic Channel Model

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2018年第4期67卷 2864-2879页

作者： Naderi, Meisam Zajic, Alenka G. Patzold, Matthias Univ Agder Fac Engn & Sci N-4879 Grimstad Norway Georgia Inst Technol Sch Elect & Comp Engn Atlanta GA 30332 USA

This paper proposes a new geometry-based shallow underwater acoustic (UWA) channel model allowing for nonisovelocity ocean conditions. The fact that the isovelocity assumption does not hold in many real-world scenarios motivates the need for developing channel models for nonisovelocity UWA propagation environments. Starting from a geometrical model, we develop a stochastic channel model for a single- input single- output (SISO) vehicle-to-vehicle UWA channel assuming that the ocean surface and bottom are rough and that the speed of sound varies with depth. The effect of the nonisovelocity condition has been assessed regarding its influence on the temporal autocorrelation function, the frequency correlation function (FCF), and the power delay profile of the UWA channel model. The UWA channel model has also been validated by matching its FCF as well as the therefrom derived main characteristic quantities, such as the average delay, delay spread, and coherence bandwidth againstmeasurement data. The proposed UWA channelmodel is very useful for the design and performance analysis of UWA communication systems under realistic propagation conditions.

关键词： Shallow underwater acoustic channels non-isovelocity condition vehicle-to-vehicle communications power delay profile temporal autocorrelation function frequency correlation function

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A Closed-Form Expression of Coherence Bandwidth for Troposcatter Links

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IEEE COMMUNICATIONS LETTERS 2018年第3期22卷 646-649页

作者： Li, Chenglong Chen, Xihong Xie, Zedong Air Force Engn Univ Informat Transmiss Lab Xian 710051 Shaanxi Peoples R China

As a promising candidate of beyond line-of-sight communication, tropospheric scatter has been broadly applied both in military and civilian facilities. Due to the multipath propagation, troposcatter (short for tropospheric scatter) channel presents distinct time dispersion, which degrades the quality of communication severely because of inter-symbol interference. Generally, coherence bandwidth can be used to describe the characteristics of multipath effect of troposcatter channel conveniently. However, there is no available formula to calculate troposcatter coherence bandwidth exactly to the best of our knowledge. In this letter, transfer function based on scattering field is derived first, and closed-form expression of coherence bandwidth for troposcatter links for the first time in the literature is obtained through frequency correlation function.

关键词： Tropospheric scatter multipath propagation frequency correlation function coherence bandwidth

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frequency correlation Modelling for Tactical VHF Channels in Mountainous Terrain

Frequency Correlation Modelling for Tactical VHF Channels in...

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IEEE Military Communications Conference (MILCOM)

作者： Pugh, Jeff Alkadamani, Mohamad Brown, Colin Jodalen, Vivianne Def Res & Dev Canada Ottawa ON Canada Commun Res Ctr Ottawa ON Canada Def Res Estab Norway Kjeller Norway

ISBN: (纸本)9781538671856

This paper considers statistical modelling of wideband propagation characteristics in the frequency domain based on the channel's complex frequency correlation function (FCF). Using a large set of wireless propagation measurements taken at 312 MHz in mountainous environments, an assessment of the accuracy with which several FCFs can model tactical VHF propagation scenarios is conducted. It is shown that, while the selected models can do a reasonable job of capturing the channel's frequency dynamics under a smooth decay, rapid oscillations in the FCF believed to arise from clustering of multipath reflections are more difficult to track. As would be expected, models with more free parameters generally provide a superior fit to the measured frequency correlations. To assist with the design and simulation of robust waveforms for these highly time-dispersive environments, coherence bandwidth statistics and model parameter distributions for a simple FCF are reported based on our measurements in three different regions.

关键词： frequency correlation function wideband channels propagation VHF measurements coherence bandwidth channel modelling

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Moving-Average Based Interference Suppression on frequency Selective SIMO Channels 79

Moving-Average Based Interference Suppression on Frequency S...

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IEEE 79th Vehicular Technology Conference (VTC-Spring)

作者： Cheng, Chien-Chun Sezginer, Serdar Sari, Hikmet Su, Yu T. SUPLEC Dept Telecommun F-91190 Gif Sur Yvette France Natl Chia Tung Univ Dept Elect & Comp Engn Hsinchu 30010 Taiwan SEQUANS Commun F-92073 Paris France

ISBN: (纸本)9781479944828

Co-channel interference suppression is a key design concern for next-generation communication systems. It is particularly challenging in the presence of frequency-selective fading as the covariance matrices of the interference plus noise vary across subcarriers. The moving average technique is an effective scheme for estimating the frequency-selective covariance matrices. But the problem of choosing the optimal window size is far from trivial. In this work, we propose a window selection scheme based on the mean square error (MSE) of the covariance estimate. It only requires information of the signalto- noise ratio (SNR) and signal-to-interference ratio (SIR) and is robust against variations of the interfering channel's power delay profile. Moreover, the results can be applied to time-varying channels by simply replacing the frequency correlation function by the time correlation function.

关键词： cochannel interference covariance matrices fading channels interference suppression mean square error methods radiofrequency interference MSE SIR SNR channel power delay profile cochannel interference suppression frequency correlation function frequency selective SIMO channels frequency-selective fading channel interference plus noise mean square error moving-average based interference suppression next-generation communication systems optimal window size signal-to-interference ratio signalto-noise ratio time correlation function time-varying channels window selection scheme Bit error rate Covariance matrices Estimation Interference Modulation Signal to noise ratio Mean square error signal to noise ratios frequency correlation function variance covariance matrix Covariance matrix Time correlation functions suppression of interference time-varying channels Signal to interference ratio frequency-selective fading channels Cochannel interference Radiofrequency interference Window Size power delay profile Bit error rate

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On the problems of symbol-spaced tapped-delay-line models for WSSUS channels

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WIRELESS COMMUNICATIONS & MOBILE COMPUTING 2009年第9期9卷 1181-1193页

作者： Gutierrez, Carlos A. Cabrera-Bean, Margarita Patzold, Matthias Univ Agder Dept Informat & Commun Technol Fac Sci & Engn N-4898 Grimstad Norway Univ Politecn Cataluna Dept Signal Theory & Commun Barcelona 08034 Spain

This paper analyzes the validity and statistical behavior of symbol-spaced tapped-delay-line (SSTDL) models for wide-sense stationary uncorrelated scattering (WSSUS) mobile radio channels. SSTDL models are obtained by sampling the channel impulse response (CIR) in delay domain at a rate equal to the reciprocal of the symbol duration. They were proposed more than four decades ago as canonical channel models for band-limited time-variant linear (TVL) systems, and are nowadays widely in use for assessing the performance of several wireless communication systems. The applicability of these tapped-delay-line (TDL) models seems to be unquestionable, as they were developed in the framework of the sampling theorem. Nonetheless, we show here that SSTDL models should be used with care to model WSSUS channels, because the channel's uncorrelated scattering (US) condition might easily be violated. Furthermore, we show that SSTDL models suffer from strong limitations in emulating the channel frequency correlation function (FCF). This drawback leads to an inaccurate performance evaluation of wireless communication systems sensitive to the FCF. To cope with this problem, we present a simple solution by doubling the channel's sampling rate. The benefits of this solution are demonstrated with some exemplary simulation results. Copyright (C) 2008 John Wiley & Sons, Ltd.

关键词： frequency correlation function multipath channel sampling theorem time-variant linear systems tapped-delay-line model WSSUS model

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Analysis and realization of an exponentially-decaying impulse response model for frequency-selective fading channels

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IEEE SIGNAL PROCESSING LETTERS 2008年 15卷 441-444页

作者： Morgan, Dennis R. Bell Labs Murray Hill NJ 07974 USA

We analyze a simple frequency-selective fading model that is formulated as a sequence of independent discrete-time impulse responses, each with independent Gaussian variates scaled by an exponential power-delay profile. This model is useful for simulating propagation path responses in a scattering environment. Various expressions and relationships are derived for the frequency correlation function, correlation bandwidth, rms delay spread, and decay time. Realization techniques are also discussed, and it is concluded that the most straightforward and efficient approach is to generate a block of samples by multiplying i.i.d. complex Gaussian variates by the square root of the exponential power-delay profile and then taking the FFT.

关键词： correlation bandwidth decay time exponential power-delay profile fading model frequency correlation function frequency-selective rms delay spread

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Estimation of Canopy Attenuation for Active/Passive Microwave Soil Moisture Retrieval Algorithms

Estimation of Canopy Attenuation for Active/Passive Microwav...

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10th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment

作者： Kurum, Mehmet Lang, Roger H. O'Neill, Peggy E. Joseph, Alicia Jackson, Tom Cosh, Mike George Washington Univ Washington DC 20052 USA NASA Goddard Space Flight Ctr Greenbelt MD 20070 USA USDA ARS Hydrol & Remote Sens Lab Beltsville MD 20705 USA

ISBN: (纸本)9781424419869

This paper discusses the importance of the proper characterization of scattering and attenuation in trees needed for accurate retrieval of soil moisture in the presence of trees. Emphasis is placed on determining an accurate estimation of the propagation properties of a vegetation canopy using the complex frequency correlation function (FCF). A new technique for determining the canopy attenuation that uses the measured stepped frequency radar backscatter response is proposed. It makes use of the details found in a transient solution where the canopy (volume scattering) and the tree-ground (double interaction) effects appear at different times. The proposed technique is based on separating the backscattering sources within a forest canopy in the time response. The technique has been used with L band data collected over deciduous trees to verify that the algorithm results match the simulated data.

关键词： Vegetation Soil Moisture Transient Response frequency correlation function

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