123 citations · 273 across the 6 of their papers we have counts for
6 papers
Massive MIMO Channel Estimation with Low-Resolution Spatial Sigma-Delta ADCs
Shilpa Rao, Gonzalo Seco-Granados, Hessam Pirzadeh +2
We consider channel estimation for an uplink massive multiple-input multiple-output (MIMO) system where the base station (BS) uses an array with low-resolution (1-2 bit) analog-to-…
On the Effect of Mutual Coupling in One-Bit Spatial Sigma-Delta Massive MIMO Systems
Hessam Pirzadeh, Gonzalo Seco-Granados, A. Lee Swindlehurst +1
The one-bit spatial Sigma-Delta concept has recently been proposed as an approach for achieving low distortion and low power consumption for massive multi-input multi-output system…
Spectral Efficiency of One-Bit Sigma-Delta Massive MIMO
Hessam Pirzadeh, Gonzalo Seco-Granados, Shilpa Rao +1
We examine the uplink spectral efficiency of a massive MIMO base station employing a one-bit Sigma-Delta sampling scheme implemented in the spatial rather than the temporal domain.…
Spectral Efficiency of Mixed-ADC Massive MIMO
Hessam Pirzadeh, A. Lee Swindlehurst
We study the spectral efficiency (SE) of a mixed-ADC massive MIMO system in which K single-antenna users communicate with a base station (BS) equipped with M antennas connected to…
A Comparison of Hybrid Beamforming and Digital Beamforming with Low-Resolution ADCs for Multiple Users and Imperfect CSI
Kilian Roth, Hessam Pirzadeh, A. Lee Swindlehurst +1
For 5G it will be important to leverage the available millimeter wave spectrum. To achieve an approximately omni- directional coverage with a similar effective antenna aperture com…
Subverting Massive MIMO by Smart Jamming
Hessam Pirzadeh, S. Mohammad Razavizadeh, Emil Björnson
We consider uplink transmission of a massive multi-user multiple-input multiple-output (MU-MIMO) system in the presence of a smart jammer. The jammer aims to degrade the sum spectr…