375 citations · 1.3k across the 13 of their papers we have counts for
13 papers
Mitigating Hand Blockage with Non-Directional Beamforming Codebooks
Vasanthan Raghavan, Ricardo A. Motos, M. Ali Tassoudji +3
Hand blockage leads to significant performance impairments at millimeter wave carrier frequencies. A number of prior works have characterized the loss in signal strength with the h…
Hand and Body Blockage Measurements with Form-Factor User Equipment at 28 GHz
Vasanthan Raghavan, Sonsay Noimanivone, Sung Kil Rho +8
Blockage by the human hand/body is an important impairment in realizing practical millimeter wave wireless systems. Prior works on blockage modeling are either based on theoretical…
Antenna Placement and Performance Tradeoffs with Hand Blockage in Millimeter Wave Systems
Vasanthan Raghavan, Mei-Li, Chi +3
The ongoing commercial deployment of millimeter wave systems brings into focus a number of practical issues in form factor user equipment (UE) design. With wavelengths becoming sma…
Channel Reconstruction-Based Hybrid Precoding for Millimeter Wave Multi-User MIMO Systems
Miguel R. Castellanos, Vasanthan Raghavan, Jung H. Ryu +4
The focus of this paper is on multi-user MIMO transmissions for millimeter wave systems with a hybrid precoding architecture at the base-station. To enable multi-user transmissions…
Statistical Blockage Modeling and Robustness of Beamforming in Millimeter Wave Systems
Vasanthan Raghavan, Lida Akhoondzadeh-asl, Vladimir Podshivalov +5
There has been a growing interest in the commercialization of millimeter wave (mmW) technology as a part of the Fifth-Generation New Radio (5G-NR) wireless standardization efforts.…
Millimeter Wave MIMO Prototype: Measurements and Experimental Results
Vasanthan Raghavan, Andrzej Partyka, Ashwin Sampath +6
Millimeter-wave multi-input multi-output (mm-Wave MIMO) systems are one of the candidate schemes for 5G wireless standardization efforts. In this context, the main contributions of…
Millimeter Wave Channel Measurements and Implications for PHY Layer Design
Vasanthan Raghavan, Andrzej Partyka, Lida Akhoondzadehasl +3
There has been an increasing interest in the millimeter wave (mmW) frequency regime in the design of next-generation wireless systems. The focus of this work is on understanding mm…
Indoor 5G 3GPP-like Channel Models for Office and Shopping Mall Environments
Katsuyuki Haneda, Lei Tian, Henrik Asplund +25
Future mobile communications systems are likely to be very different to those of today with new service innovations driven by increasing data traffic demand, increasing processing…
Investigation of Prediction Accuracy, Sensitivity, and Parameter Stability of Large-Scale Propagation Path Loss Models for 5G Wireless Communications
Shu Sun, Theodore S. Rappaport, Timothy A. Thomas +6
This paper compares three candidate large-scale propagation path loss models for use over the entire microwave and millimeter-wave (mmWave) radio spectrum: the alpha-beta-gamma (AB…
5G 3GPP-like Channel Models for Outdoor Urban Microcellular and Macrocellular Environments
Katsuyuki Haneda, Lei Tian, Yi Zheng +26
For the development of new 5G systems to operate in bands up to 100 GHz, there is a need for accurate radio propagation models at these bands that currently are not addressed by ex…
Beamforming Tradeoffs for Initial UE Discovery in Millimeter-Wave MIMO Systems
Vasanthan Raghavan, Juergen Cezanne, Sundar Subramanian +2
Millimeter-wave MIMO systems have gained increasing traction towards the goal of meeting the high data-rate requirements in next-generation wireless systems. The focus of this work…
Propagation Path Loss Models for 5G Urban Micro- and Macro-Cellular Scenarios
Shu Sun, Theodore S. Rappaport, Sundeep Rangan +7
This paper presents and compares two candidate large-scale propagation path loss models, the alpha-beta-gamma (ABG) model and the close-in (CI) free space reference distance model,…
Wireless Backhaul Node Placement for Small Cell Networks
Muhammad Nazmul Islam, Ashwin Sampath, Atul Maharshi +2
Small cells have been proposed as a vehicle for wireless networks to keep up with surging demand. Small cells come with a significant challenge of providing backhaul to transport d…