6 citations · 8 across the 12 of their papers we have counts for
12 papers
Beam Training for RIS-Aided ISAC Systems
Jinho Yang, Hyeongtaek Lee, Junil Choi
As a key technology for 6G, integrated sensing and communication (ISAC) is receiving considerable attention, and deploying a reconfigurable intelligent surface (RIS) can enhance bo…
Efficient Upper Mid-Band Spectrum Sensing with Multiple Signals
Yongjun Kim, Ali Rasteh, Sundeep Rangan +1
Spectrum sensing is a fundamental problem in the upper mid-band, where spectrum resources are shared with incumbent systems. This paper considers frequency-domain occupancy estimat…
A Self-Calibrating SDR for High Fidelity Beam- and Null-forming Arrays
Yongjun Kim, Aditya Dhananjay, Sundeep Rangan +5
Null forming is increasingly essential in modern wireless systems for spectrum-sharing, anti-jamming, and covert communications in contested and congested environments. Achieving d…
Efficient Solvers for Coupling-Aware Beamforming in Continuous Aperture Arrays
Geonhee Lee, Kwonyeol Park, Hyeongjun Park +2
In continuous aperture arrays (CAPAs), careful consideration of the underlying physics is essential, among which electromagnetic (EM) mutual coupling plays a critical role in beamf…
Evolution of UE in Massive MIMO Systems for 6G: From Passive to Active
Kwonyeol Park, Hyuckjin Choi, Geonho Han +4
As wireless networks continue to evolve, stringent latency and reliability requirements and highly dynamic channels expose fundamental limitations of gNB-centric massive multiple-i…
Anomaly Detection-Based UE-Centric Inter-Cell Interference Suppression
Kwonyeol Park, Hyuckjin Choi, Beomsoo Ko +7
The increasing spectral reuse can cause significant performance degradation due to interference from neighboring cells. In such scenarios, developing effective interference suppres…
Downlink Channel Estimation for mmWave Systems with Impulsive Interference
Kwonyeol Park, Gyoseung Lee, Hyeongtaek Lee +2
In this paper, we investigate a channel estimation problem in a downlink millimeter-wave (mmWave) multiple-input multiple-output (MIMO) system, which suffers from impulsive interfe…
A Bayesian Framework For Cascaded Channel Estimation in RIS-Aided mmWave Systems
Gyoseung Lee, Junil Choi
In this paper, we investigate cascaded channel estimation for reconfigurable intelligent surface (RIS)-aided millimeter-wave multi-user communication systems. Since the complex cha…
Robust Transmission Design for Active RIS-Aided Systems
Jinho Yang, Hyeongtaek Lee, Junil Choi
Different from conventional passive reconfigurable intelligent surfaces (RISs), incident signals and thermal noise can be amplified at active RISs. By exploiting the amplifying cap…
An Experimental Multi-Band Channel Characterization in the Upper Mid-Band
Roberto Bomfin, Ahmad Bazzi, Hao Guo +5
The following paper provides a multi-band channel measurement analysis on the frequency range (FR)3. This study focuses on the FR3 low frequencies 6.5 GHz and 8.75 GHz with a setup…
RIS-Enabled Cellular Systems Operated by Different Service Providers
Hyeongtaek Lee, Junil Choi
In realistic cellular communication systems, multiple service providers will operate within different frequency ranges. Each serving cell, which is managed by a distinct service pr…
Multi-Group Multicasting Systems Using Multiple RISs
Hyeongtaek Lee, Seungsik Moon, Youngjoo Lee +3
In this paper, practical utilization of multiple distributed reconfigurable intelligent surfaces (RISs), which are able to conduct group-specific operations, for multi-group multic…