9 citations · 13 across the 8 of their papers we have counts for
9 papers
Physical-Layer Aspects of Repeater-Assisted MIMO
Diana P. M. Osorio, Kohei Ueda, Anubhab Chowdhury +4
Network-controlled repeaters (NCRs) are emerg- ing as low-cost, band-selective active scatterers that can re- shape the wireless propagation environment without backhaul or tight p…
On Optimal Strategies for Joint Reciprocity Calibration in Distributed MIMO
Kohei Ueda, Anubhab Chowdhury, Koji Ishibashi +1
This paper investigates the impact of reciprocity calibration errors on the downlink spectral efficiency (SE) of multi-user large antenna systems. Specifically, we consider two cal…
Repeater-Assisted Massive MIMO Downlink Performance with Calibration Errors
Kohei Ueda, Anubhab Chowdhury, Koji Ishibashi +1
Reciprocity-based downlink beamforming is imperative for a scalable time-division duplex massive multiple-input multiple-output~(MIMO) deployment. Specifically, for a dual-antenna…
On the Performance of Dual-Antenna Repeater Assisted Bi-Static MIMO ISAC
Anubhab Chowdhury, Erik G. Larsson
This paper presents a framework for target detection and downlink data transmission in a repeater-assisted bi-static integrated sensing and communication system. A repeater is an a…
Is Repeater-Assisted Massive MIMO Compatible with Dynamic TDD?
Martin Andersson, Anubhab Chowdhury, Erik G. Larsson
We present a framework for joint amplification and phase shift optimization of the repeater gain in dynamic time-division duplex (TDD) repeater-assisted massive MIMO networks. Repe…
Joint Sensing and Bi-Directional Communication with Dynamic TDD Enabled Cell-Free MIMO
Anubhab Chowdhury, Sai Subramanyam Thoota, Erik G. Larsson
This paper studies integrated sensing and communication (ISAC) with dynamic time division duplex (DTDD) cell-free (CF) massive multiple-input multiple-output~(mMIMO) systems. DTDD…
Repeater Swarm-Assisted Cellular Systems: Interaction Stability and Performance Analysis
Jianan Bai, Anubhab Chowdhury, Anders Hansson +1
We consider a cellular massive MIMO system where swarms of wireless repeaters are deployed to improve coverage. These repeaters are full-duplex relays with small form factors that…
Half-Duplex APs with Dynamic TDD vs. Full-Duplex APs in Cell-Free Systems
Anubhab Chowdhury, Chandra R. Murthy
In this paper, we present a comparative study of half-duplex (HD) access points (APs) with dynamic time-division duplex (DTDD) and full-duplex (FD) APs in cell-free (CF) systems. A…
Can Dynamic TDD Enabled Half-Duplex Cell-Free Massive MIMO Outperform Full-Duplex Cellular Massive MIMO?
Anubhab Chowdhury, Ribhu Chopra, Chandra R. Murthy
We consider a dynamic time division duplex (DTDD) enabled cell-free massive multiple-input multiple-output (CF-mMIMO) system, where each half-duplex (HD) access point (AP) is sched…