50 citations · 76 across the 10 of their papers we have counts for
6 papers · 1 filter
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…
Achieving Distributed MIMO Performance with Repeater-Assisted Cellular Massive MIMO
Sara Willhammar, Hiroki Iimori, Joao Vieira +3
In what ways could cellular massive MIMO be improved? This technology has already been shown to bring huge performance gains. However, coverage holes and difficulties to transmit m…