Zobrazeno 1 - 10
of 21
pro vyhledávání: '"C. Umit Bas"'
Publikováno v:
IEEE Transactions on Wireless Communications. 18:3843-3855
Time-division multiplexed (TDM) channel sounders, in which a single RF chain is connected sequentially via an electronic switch to different elements of an array, are widely used for the measurement of double-directional/MIMO propagation channels. Th
Publikováno v:
IEEE Transactions on Communications. 67:2995-3008
This paper presents the system design, calibration, and example measurements of a novel ultra-wideband, low-cost, real-time channel sounder. The channel sounder operates in the frequency range from 3 to 18 GHz with a 15-GHz bandwidth thus providing a
Autor:
Kuyeon Whang, Charlie Jianzhong Zhang, Jeong-Ho Park, Thomas Choi, Sooyoung Hur, Andreas F. Molisch, C. Umit Bas, Seun Sangodoyin, Rui Wang
Publikováno v:
IEEE Transactions on Wireless Communications. 18:1477-1489
Outdoor to indoor penetration loss is one of the crucial challenges faced at millimeter-wave frequencies. This paper presents the results from 28-GHz channel sounding campaigns performed to investigate the impact of this phenomenon on the wireless pr
Autor:
Reiner S. Thoma, Ju-Ho Lee, C. Umit Bas, Charlie Jianzhong Zhang, Christain Schneider, Andreas F. Molisch, Vinod Kristem, Martin Kaske, Gerd Sommerkorn, Seun Sangodoyin
Publikováno v:
IEEE Transactions on Wireless Communications. 17:5076-5091
Multidimensional characterization of outdoor urban macrocellular propagation channels is essential for the analysis and design of next-generation (5G and beyond) cellular massive MIMO (multiple-input-multiple-output) systems. Since most massive MIMO
Publikováno v:
IEEE Transactions on Wireless Communications. 17:4620-4633
Fifth generation cellular systems will operate in a wide range of frequencies, covering both the traditional cellular bands, and mm-wave frequency bands, either selecting a specific band or operating in multiple bands simultaneously. For the design o
Publikováno v:
IEEE Transactions on Wireless Communications. 16:7264-7275
This paper describes a high-resolution parameter estimation algorithm applied to the vehicle-to-vehicle (V2V) multi-dimensional channel measurements. The algorithm, which is based on a maximum likelihood estimator, jointly estimates parameters of mul
Autor:
Thomas Choi, C. Umit Bas, Jeong-Ho Park, Andreas F. Molisch, Jianzhong Zhang, Rui Wang, Sooyoung Hur
Publikováno v:
GLOBECOM
This paper investigates the effects of a human body shadowing for a device-to-device (D2D) communications scenario at 28 GHz. The measurements are performed with a real-time channel sounder equipped with fast-switching phased antenna arrays, which en
Autor:
Andreas F. Molisch, Jeong-Ho Park, Seun Sangodoyin, C. Umit Bas, Kuyeon Whang, Rui Wang, Sooyoung Hur, Jianzhong Zhang
Publikováno v:
GLOBECOM
This paper presents results from channel sounding campaigns that investigate the impact of foliage blockage on the wireless propagation channel characteristics at 28 GHz. The measurements are performed with a real-time channel sounder equipped with p
Publikováno v:
ICC
This paper investigates the impact of array switching patterns on the accuracy of parameter estimation of multipath components for a time division multiplexed (TDM) channel sounder. To measure fast time-varying channels, the conventional uniform arra
Autor:
C. Umit Bas, Sooyoung Hur, Jeong-Ho Park, Kuyeon Whang, Rui Wang, Andreas F. Molisch, Jianzhong Zhang, Seun Sangodoyin
Publikováno v:
2018 International Applied Computational Electromagnetics Society Symposium (ACES).
This paper presents results from several 28 GHz propagation channel measurement campaigns performed with a real-time channel sounder that is capable of performing directionally-resolved channel measurements in dynamic environments. We summarize the k