scholarly journals Sub-THz VNA-based Channel Sounder Structure and Channel Measurements at 100 and 300 GHz

2021 ◽  
Author(s):  
Yejian Lyu ◽  
Pekka Kyosti ◽  
Wei Fan
Keyword(s):  
Channel Measurements ◽  
Channel Sounder

scholarly journals Broadband Extended Array Response-Based Subspace Multiparameter Estimation Method for Multipolarized Wireless Channel Measurements

2020 ◽  
Author(s):  
Bensheng Yang ◽  
Peize Zhang ◽  
Haiming Wang ◽  
Cheng-Xiang Wang ◽  
Xiaohu You
Keyword(s):  
Antenna Array ◽  
Mobile Communications ◽  
Channel Model ◽  
Estimation Method ◽  
Wireless Channel ◽  
Antenna Element ◽  
Channel Measurements ◽  
Multiple Signal Classification ◽  
Channel Sounder ◽  
Multiple Parameters

The clustered delay line channel model, in which each cluster consists of a number of rays, is widely used for link-level evaluations in mobile communications. Multiple parameters of each ray, including delay, amplitude, cross polarization ratio (XPR), initial phases of four polarization combinations and the azimuth and elevation angles of arrival and departure, shall be known. These parameters are measured using a channel sounder. The number of rays in every cluster is usually greater than the number of elements in the antenna array of the channel sounder, which represents a challenging issue in multipolarized channel measurements. A new subspace estimation method based on the broadband extended array response of an electromagnetic vector antenna array is proposed to resolve a large number of rays. The interelement spacing of the array can be greater than half the carrier wavelength, which reduces interelement coupling and simplifies the array design, especially for millimeter wave bands. First, the delay of each cluster is estimated using the reference antenna element. Then, the 2D angles of every ray are estimated using the classic rank-deficient multiple signal classification (MUSIC). Lastly, the initial phases, XPR and amplitude of every ray is estimated. Simulation results validate the proposed method.

Versatile Radio Channel Sounder for Double Directional and Multi-link MIMO Channel Measurements at 11 GHz

2014 ◽  
Vol E97.C (10) ◽  
pp. 994-1004 ◽  
Author(s):  
Yohei KONISHI ◽  
Yuyuan CHANG ◽  
Minseok KIM ◽  
Jun-ichi TAKADA
Keyword(s):  
Radio Channel ◽  
Mimo Channel ◽  
Channel Measurements ◽  
Channel Sounder

60 GHz short-range communications: channel measurements, analysis, and modeling

2011 ◽  
Vol 3 (2) ◽  
pp. 201-211 ◽  
Author(s):  
Alexis Paolo Garcia Ariza ◽  
Uwe Trautwein ◽  
Robert Müller ◽  
Frank Wollenschläger ◽  
Reiner S. Thomä ◽  
...  
Keyword(s):  
Short Range ◽  
High Rate ◽  
60 Ghz ◽  
Channel Measurements ◽  
Channel Sounder ◽  
Time Dispersion ◽  
Measurement And Analysis ◽  
Extended Range ◽  
Wideband Radio ◽  
Very High

This article presents measurement and analysis results for 60 GHz short-range wideband radio channels. We consider two scenarios, referred to as “very-high-rate extended-range” (VHR-E) and “ultra-high-rate cordless” (UHR-C). The VHR-E measurements aimed at 60 GHz fixed networks for an Airbus A340 cabin both under static and dynamic (shadowing due to passenger movement) channel conditions. We describe the channel sounder used for the VHR-E measurements and present a simple multipath model derived from the measurements. Furthermore, simulations show the feasibility of the ray-tracing approach for this kind of channel. As a typical UHR-C use case, a data kiosk scenario was investigated. Various propagation conditions are analyzed with respect to channel gain, time dispersion, and frequency selectivity.

scholarly journals Industrial wireless channel measurements in a 2.4 GHz ISM radio band using a low-cost SDR-based channel sounder

2020 ◽  
Vol 9 (1) ◽  
pp. E1-1-E1-25
Author(s):  
Grzegorz Korzeniewski ◽  
◽  
Roberto Carrasco Álvarez ◽  
Keyword(s):  
Software Defined Radio ◽  
Communication Systems ◽  
Multipath Propagation ◽  
Low Cost ◽  
Wireless Channel ◽  
Channel Measurements ◽  
Channel Sounding ◽  
Channel Sounder ◽  
Radio Band ◽  
Mathematical Foundations

Industrial wireless channel is a challenge for the design of communication systems, due to non-Line-of-Sight transmission, caused by the presence of many highly reflective obstacles, and machines in operation, which are a source of the increased noise level. The main effect, which must be analyzed, is multipath propagation. In this article, a low-cost sounding system is proposed, based on Software Defined Radio (SDR) equipment, with the intention of making sounding devices more accessible to a larger group of researchers. Likewise, the mathematical foundations and the software/hardware implementation of the wireless channel sounding system are presented, and the solutions to mitigate the synchronization issues and SDR limitations are also introduced. The performance of the proposed sounder is validated through a measurement campaign in an industrial workshop, considering the 2.4 GHz Industrial, Scientific, Medical (ISM) band. Channel sounding measurements corroborate the accuracy of the results, which converge with the channel mathematical models proposed for several industrial environments and reported in the state-of-the-art literature. In this sense, the proposed channel sounder can be used to investigate the wireless propagation environments.

scholarly journals Broadband Extended Array Response-Based Subspace Multiparameter Estimation Method for Multipolarized Wireless Channel Measurements

2020 ◽  
Author(s):  
Bensheng Yang ◽  
Peize Zhang ◽  
Haiming Wang ◽  
Cheng-Xiang Wang ◽  
Xiaohu You
Keyword(s):  
Antenna Array ◽  
Mobile Communications ◽  
Channel Model ◽  
Estimation Method ◽  
Wireless Channel ◽  
Antenna Element ◽  
Channel Measurements ◽  
Multiple Signal Classification ◽  
Channel Sounder ◽  
Multiple Parameters

The clustered delay line channel model, in which each cluster consists of a number of rays, is widely used for link-level evaluations in mobile communications. Multiple parameters of each ray, including delay, amplitude, cross polarization ratio (XPR), initial phases of four polarization combinations and the azimuth and elevation angles of arrival and departure, shall be known. These parameters are measured using a channel sounder. The number of rays in every cluster is usually greater than the number of elements in the antenna array of the channel sounder, which represents a challenging issue in multipolarized channel measurements. A new subspace estimation method based on the broadband extended array response of an electromagnetic vector antenna array is proposed to resolve a large number of rays. The interelement spacing of the array can be greater than half the carrier wavelength, which reduces interelement coupling and simplifies the array design, especially for millimeter wave bands. First, the delay of each cluster is estimated using the reference antenna element. Then, the 2D angles of every ray are estimated using the classic rank-deficient multiple signal classification (MUSIC). Lastly, the initial phases, XPR and amplitude of every ray is estimated. Simulation results validate the proposed method.

scholarly journals DEVELOPMENT OF DIRECTIONALCHANNEL SOUNDER USING USRPAND GNU RADIO

2017 ◽  
Vol 7 (1) ◽  
pp. 69-79
Author(s):  
Tianyang Min ◽  
Kentaro Saito ◽  
Jun-ichi Takada
Keyword(s):  
Measurement System ◽  
Low Cost ◽  
Software Radio ◽  
Mimo Channel ◽  
Channel Measurements ◽  
Gnu Radio ◽  
Transmission Performance ◽  
Propagation Channel ◽  
Channel Sounder ◽  
Mimo Transmission

MIMO channel sounding is essential for evaluating the MIMO transmission performance in real propagation environments. In this paper, we have developed a versatile channel sounder by using the GNU Radio and Universal Software Radio Peripheral (USRP) platform and the virtual antenna array method. The developed channel sounder is low cost and can be utilized flexibly for measurements in the UHF band. The performance of the developed channel sounder was validated through a T-junction cable connected test and an indoor channel measurement. The result showed that the performance quite agreed with the measurement of a VNA-based measurement system. The developed channel sounder is expected to be utilized for various kinds of propagation channel measurements.

Parallel Channel Sounder for MIMO Channel Measurements

2018 ◽  
Vol 25 (5) ◽  
pp. 16-22 ◽  
Author(s):  
Yang Yang ◽  
Yunsong Gui ◽  
Haowen Wang ◽  
Wuxiong Zhang ◽  
Yang Li ◽  
...  
Keyword(s):  
Mimo Channel ◽  
Channel Measurements ◽  
Parallel Channel ◽  
Channel Sounder

A UAV-aided channel sounder for air-to-ground channel measurements

2021 ◽  
pp. 101366
Author(s):  
Benzhe Ning ◽  
Tingpeng Li ◽  
Kai Mao ◽  
Xiaomin Chen ◽  
Manxi Wang ◽  
...  
Keyword(s):  
Channel Measurements ◽  
Channel Sounder

scholarly journals Directive mmWave radio channel modeling in a ship hull

2021 ◽  
pp. 1-12
Author(s):  
Brecht De Beelde ◽  
Andrés Almarcha Lopéz ◽  
David Plets ◽  
Marwan Yusuf ◽  
Emmeric Tanghe ◽  
...  
Keyword(s):  
Radio Channel ◽  
Path Loss ◽  
Channel Modeling ◽  
Ship Hull ◽  
Line Of Sight ◽  
Delay Spread ◽  
60 Ghz ◽  
Channel Measurements ◽  
Channel Sounder ◽  
Path Distance

Abstract Wireless connectivity has been realized for multiple environments and different frequency bands. However, little research exists about mmWave communication in industrial environments. This paper presents the 60 GHz double-directional radio channel for mmWave communication in a ship hull for Line-of-Sight (LOS) and non-Line-of-Sight (NLOS) conditions. We performed channel measurements using the Terragraph channel sounder at different locations in the ship hull and fitted LOS path loss to a one-slope path loss model. Path loss and root-mean-square delay spread of the LOS path is compared to the reflected path with lowest path loss. NLOS communication via this first-order reflected path is modeled by calculating the path distance and determining the reflection loss. The reflection losses have a considerable contribution to the signal attenuation of the reflected path. The channel models are implemented in an indoor coverage prediction tool, which was extended with a ray launching algorithm and validated by comparison with an analytical electromagnetic solver. The results show that the mmWave radio channel allows high-throughput communication within a ship hull compartment, even when no LOS path between the transmitter and receiver is present.

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