4.7k citations · 7.1k across the 34 of their papers we have counts for
10 papers · 1 filter
On Time-of-Arrival Estimation in NB-IoT Systems
Sha Hu, Xuhong Li, Fredrik Rusek
We consider time-of-arrival (ToA) estimation of a first arrival-path for a device working in narrowband Internet-of-Things (NB-IoT) systems. Due to a limited 180 KHz bandwidth used…
User Assignment with Distributed Large Intelligent Surface (LIS) Systems
Sha Hu, Krishna Chitti, Fredrik Rusek +1
In this paper, we consider a wireless communication system where a large intelligent surface (LIS) is deployed comprising a number of small and distributed LIS-Units. Each LIS-Unit…
Beyond Massive-MIMO: The Potential of Data-Transmission with Large Intelligent Surfaces
Sha Hu, Fredrik Rusek, Ove Edfors
In this paper, we consider the potential of data-transmission in a system with a massive number of radiating and sensing elements, thought of as a contiguous surface of electromagn…
Sequential Channel Estimation in the Presence of Random Phase Noise in NB-IoT Systems
Fredrik Rusek, Sha Hu
We consider channel estimation (CE) in narrowband Internet-of-Things (NB-IoT) systems. Due to the fluctuations in phase within receiver and transmitter oscillators, and also the re…
Beyond Massive-MIMO: The Potential of Positioning with Large Intelligent Surfaces
Sha Hu, Fredrik Rusek, Ove Edfors
We consider the potential for positioning with a system where antenna arrays are deployed as a large intelligent surface (LIS), which is a newly proposed concept beyond massive-MIM…
Massive MIMO Performance - TDD Versus FDD: What Do Measurements Say?
Jose Flordelis, Fredrik Rusek, Fredrik Tufvesson +2
Downlink beamforming in Massive MIMO either relies on uplink pilot measurements - exploiting reciprocity and TDD operation, or on the use of a predetermined grid of beams with user…
Improving the Performance of OTDOA based Positioning in NB-IoT Systems
Sha Hu, Axel Berg, Xuhong Li +1
In this paper, we consider positioning with observed-time-difference-of-arrival (OTDOA) for a device deployed in long-term-evolution (LTE) based narrow-band Internet-of-things (NB-…
A Generalized Zero-Forcing Precoder with Successive Dirty-Paper Coding in MISO Broadcast Channels
Sha Hu, Fredrik Rusek
In this paper, we consider precoder designs for multiuser multiple-input-single-output (MISO) broadcasting channels. Instead of using a traditional linear zero-forcing (ZF) precode…
The Potential of Using Large Antenna Arrays on Intelligent Surfaces
Sha Hu, Fredrik Rusek, Ove Edfors
In this paper, we consider capacities of single-antenna terminals communicating to large antenna arrays that are deployed on surfaces. That is, the entire surface is used as an int…
Cramér-Rao Lower Bounds for Positioning with Large Intelligent Surfaces
Sha Hu, Fredrik Rusek, Ove Edfors
We consider the potential for positioning with a system where antenna arrays are deployed as a large intelligent surface (LIS). We derive Fisher-informations and Cramér-Rao lower b…