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Thijs Wijnands - IEEE Xplore Author Profile

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Author details

Thijs Wijnands

Also published under: T. Wijnands

Publications

11

Citations

161

Publications by Year

19992011

Co-Authors:

Kazuhiko AikawaG. ArduiniR. AssmannR. BaileyM. Brugger

Show All Co-Authors (36)

Thijs Wijnands

Also published under: T. Wijnands

Affiliation

European Laboratory for Particle Physics

CERN

Geneva, Switzerland

Publication Topics

Dose Rate,
Fiber Samples,
Function Of Dose,
Light Attenuation,
OH Concentration,
Optical Fiber,
Radiation Field,
Silica Fiber,
Total Dose,
60Co Source,
Absorption Band,
Additional Defects

Biography

Thijs Wijnands (M'08) received the M.Sc. degree from the University of Utrecht, Utrecht, The Netherlands, in 1992, and the Ph.D. degree from the Pierre & Marie Curie University (Paris VI), Paris, France, in 1996, both in experimental physics.,He conducted his research at the Nuclear Research Center CEA-Cadarache in the field of nuclear fusion and tokamaks. In 1998, he joined CERN, the European Laboratory for Nuclear Research, Geneva, Switzerland, to work on the large electron–positron collider and, from 2001 onward, on the construction and commission of the large hadron collider. He is currently in charge of radiation safety at CERN.(Based on document published on 19 September 2011).

Publications

11

Citations

161

Publications by Year

19992011

Co-Authors:

Kazuhiko Aikawa
G. Arduini
R. Assmann
R. Bailey
M. Brugger

Show All Co-Authors (36)

Author's Published Works

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Showing 1-25 of 43 results

Conferences (30)

Journals (12)

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Sha Hu(43)
Fredrik Rusek(25)
Ove Edfors(9)
Hao Wang(8)
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Department of Electrical and Information Technology, Lund University, Lund, Sweden(23)
Huawei Technologies Co., Ltd., Beijing, China(4)
Lund Research Center, Huawei Technologies Sweden AB, Sweden(3)
Huawei Lund Research Center, Lund, Sweden(3)
Huawei Technologies Company Ltd., Beijing, China(2)
2019 IEEE Wireless Communications and Networking Conference (WCNC)(3)
2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)(3)
IEEE Transactions on Signal Processing(3)
IEEE Transactions on Wireless Communications(3)
2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)(2)
IEEE(43)
Valencia, Spain(5)
Abu Dhabi, United Arab Emirates(3)
Marrakesh, Morocco(3)
Barcelona, Spain(2)
Pacific Grove, CA, USA(2)
Additive Noise(13)
Channel Estimation(11)
Inter-symbol Interference(8)
Large Intelligent Surfaces(8)
Cramer-Rao Lower Bound(7)

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Results

Joint Channel and Nonlinearity Estimation for Memoryless Nonlinear Systems

Zahra Mokhtari;Rui Dinis;Sha Hu;Dzevdan Kapetanovic

Year: 2025 | Volume: 13 | Journal Article |

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System nonlinearity due to hardware impairments has always been a challenging issue. Distortion cancellation and iterative detection based receivers such as the Bussgang Noise Cancelling (BNC) receiver are used to detect the original data in the presence of strong nonlinear (NL) effects. However, these receivers require knowledge of the system nonlinearity which is usually unknown in practical sys...Show More

Joint Channel and Nonlinearity Estimation for Memoryless Nonlinear Systems

Zahra Mokhtari;Rui Dinis;Sha Hu;Dzevdan Kapetanovic

Year: 2025 | Volume: 13 | Journal Article |

Enhanced ToA Estimates with Positioning Reference Signal in Delay-Doppler Domain

Mohammad Javad Emadi;Sha Hu;Hao Wang

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2024 | Conference Paper |

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Precise positioning plays a critical role in beyond-fifth-generation ($\mathbf{B 5 G}$) wireless networks for a wide range of indoor and outdoor applications. Conventionally, positioning accuracy can be dramatically degraded in a high Doppler environment and it may also require complex signal processing technique to accurately estimate the positioning in harsh multipath channels. Thus, this paper ...Show More

Enhanced ToA Estimates with Positioning Reference Signal in Delay-Doppler Domain

Mohammad Javad Emadi;Sha Hu;Hao Wang

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2024 | Conference Paper |

On Beamforming Design for ISAC Transceiver in Presence of Self-Interference

Mohammad Javad Emadi;Sha Hu;Jing Qian;Hao Wang

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2024 | Conference Paper |

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To support object detection and tracking as one of the main services of a mono-static integrated sensing and communications (ISAC), an ISAC node needs to operate in full-duplex mode, and therefore suffers from strong self-interference (SI) mainly due to mutual coupling (MC) between its antenna arrays. This paper studies beamforming (BF) designs at transmitter (Tx) and/or receiver (Rx) sides of ISA...Show More

On Beamforming Design for ISAC Transceiver in Presence of Self-Interference

Mohammad Javad Emadi;Sha Hu;Jing Qian;Hao Wang

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2024 | Conference Paper |

AI Receiver Design with Deep Learning Based Channel Estimation and MIMO Detection

Xiangzhao Qin;Sha Hu;Jiankun Zhang;Jing Qian;Hao Wang

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2024 | Conference Paper |

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Deep learning (DL) and artificial intelligence (AI) based channel estimation (CE) and multi-input and multi-output (MIMO) detection (MIMODet), have gained emerging interests in communication systems, aiming for leveraging the advantages of AI. However, it is a non-trivial task for AI based CE or MIMODet to outperform classical algorithms, especially when those are close to optimal. For instance, t...Show More

AI Receiver Design with Deep Learning Based Channel Estimation and MIMO Detection

Xiangzhao Qin;Sha Hu;Jiankun Zhang;Jing Qian;Hao Wang

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2024 | Conference Paper |

Supporting Probabilistic Constellation Shaping in 5G-NR Evolution

Sha Hu;Hao Wang;Sergei Semenov

IEEE Transactions on Wireless Communications

Year: 2024 | Volume: 23, Issue: 4 | Journal Article |

Cited by: Papers (1)

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It is known that probabilistic constellation shaping (PCS) can provide a shaping-gain of 1.53dB asymptotically as signal-to-noise (SNR) increases. This is however, under ideal assumptions that the system operates in optimal sense and can achieve the Shannon capacity. In practice, the system can operate well below the capacity. In this paper, we propose a PCS-transceiver for the fifth-generation ne...Show More

Supporting Probabilistic Constellation Shaping in 5G-NR Evolution

Sha Hu;Hao Wang;Sergei Semenov

IEEE Transactions on Wireless Communications

Year: 2024 | Volume: 23, Issue: 4 | Journal Article |

Design of Near-Field Beamforming for Large Intelligent Surfaces

Sha Hu;Hao Wang;Mehmet C. Ilter

IEEE Transactions on Wireless Communications

Year: 2024 | Volume: 23, Issue: 1 | Journal Article |

Cited by: Papers (12)

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In this paper, we propose a novel three-dimensional (3D) near-field beamforming (BF) design for Large Intelligent Surface (LIS). We firstly investigate the definitions of near-field and far-field of LIS, and derive the Fresnel near-field region where amplitudes variations are negligible but only phase variations worsen the harvested array-gains. We show that the Fresnel region which covers the maj...Show More

Design of Near-Field Beamforming for Large Intelligent Surfaces

Sha Hu;Hao Wang;Mehmet C. Ilter

IEEE Transactions on Wireless Communications

Year: 2024 | Volume: 23, Issue: 1 | Journal Article |

Fairness-aware Location and Hybrid Beamforming Optimization in IRSs-aided Cell-free MIMO System

Kewei Wang;Nan Qi;Ming Xiao;Sha Hu;Bjorn Sihlbom

2023 IEEE/CIC International Conference on Communications in China (ICCC)

Year: 2023 | Conference Paper |

Cited by: Papers (5)

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Intelligent reflecting surface/Reconfigurable intelligent surface (IRS/RIS) and cell-free networks have been proposed as revolutionary technologies for beyond fifth-generation (B5G) and sixth-generation (6G) communication, which may significantly improve the connection quality and coverage to meet future communication demand for extremely massive connectivity and high reliability. In this paper, w...Show More

Fairness-aware Location and Hybrid Beamforming Optimization in IRSs-aided Cell-free MIMO System

Kewei Wang;Nan Qi;Ming Xiao;Sha Hu;Bjorn Sihlbom

2023 IEEE/CIC International Conference on Communications in China (ICCC)

Year: 2023 | Conference Paper |

High Layer Coding for Video Transmission

Sergei Semenov;Sha Hu;Kuangda Tian

2023 International Conference on Computer, Information and Telecommunication Systems (CITS)

Year: 2023 | Conference Paper |

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In this paper we consider improving the effectiveness of video transmission with the help of high layer coding. We show that the unequal error protection of parts of video stream of different importance with the help of high layer coding could be more beneficial under hard erasure channel conditions. We also show that applying even short codes with low complexity decoding at high network layers ca...Show More

High Layer Coding for Video Transmission

Sergei Semenov;Sha Hu;Kuangda Tian

2023 International Conference on Computer, Information and Telecommunication Systems (CITS)

Year: 2023 | Conference Paper |

On the Design of Nonlinear Characteristics That Optimize Maximum Likelihood OFDM Performance

Daniel Macedo;João Guerreiro;Rui Dinis;Sha Hu

IEEE Transactions on Vehicular Technology

Year: 2023 | Volume: 72, Issue: 12 | Journal Article |

Cited by: Papers (2)

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Usually, non-linear (NL) distortion is seen as something undesirable that can substantially degrade the performance of communication systems. Multicarrier schemes such as orthogonal frequency division multiplexing (OFDM) suffer particularly from this impairment due to their high envelope fluctuations. However, studies have shown the potential of taking advantage of nonlinear distortion as addition...Show More

On the Design of Nonlinear Characteristics That Optimize Maximum Likelihood OFDM Performance

Daniel Macedo;João Guerreiro;Rui Dinis;Sha Hu

IEEE Transactions on Vehicular Technology

Year: 2023 | Volume: 72, Issue: 12 | Journal Article |

Channel Estimation based on Gaussian Mixture Models with Structured Covariances

Benedikt Fesl;Michael Joham;Sha Hu;Michael Koller;Nurettin Turan;Wolfgang Utschick

2022 56th Asilomar Conference on Signals, Systems, and Computers

Year: 2022 | Conference Paper |

Cited by: Papers (12)

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In this work, we propose variations of a Gaussian mixture model (GMM) based channel estimator that was recently proven to be asymptotically optimal in the minimum mean square error (MMSE) sense. We account for the need of low computational complexity in the online estimation and low cost for training and storage in practical applications. To this end, we discuss modifications of the underlying exp...Show More

Channel Estimation based on Gaussian Mixture Models with Structured Covariances

Benedikt Fesl;Michael Joham;Sha Hu;Michael Koller;Nurettin Turan;Wolfgang Utschick

2022 56th Asilomar Conference on Signals, Systems, and Computers

Year: 2022 | Conference Paper |

Approximate Noise-Whitening in MIMO Detection via Banded-Inverse Extension

Sha Hu;Hao Wang

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

Year: 2022 | Conference Paper |

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In this paper, we propose a novel approximate noise-whitening for multi-input multi-output (MIMO) detection via banded-inverse extension (BIE). If a noise covariance matrix origins from a Gauss-Markov process (GMP), its inverse is banded and the proposal is exact and yields no accuracy-losses. For general matrices to be inverted, the approximation-errors from inversion introduce a mismatched MIMO ...Show More

Approximate Noise-Whitening in MIMO Detection via Banded-Inverse Extension

Sha Hu;Hao Wang

2022 IEEE 96th Vehicular Technology Conference (VTC2022-Fall)

Year: 2022 | Conference Paper |

Near-Field Beamforming for Large Intelligent Surfaces

Sha Hu;Mehmet C. Ilter;Hao Wang

2022 IEEE 33rd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2022 | Conference Paper |

Cited by: Papers (5)

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In this paper, we propose a novel near-field beamforming (BF) design with a Large Intelligent Surface (LIS) that is implemented as a discretized 2D-array. We first investigate the definitions of the near-field and far-field regions, and determine the Fraunhofer distance of the LIS, which scales up linearly in the surface-area of the LIS. Hence, a user-equipment (UE) can enter the near-field of a L...Show More

Near-Field Beamforming for Large Intelligent Surfaces

Sha Hu;Mehmet C. Ilter;Hao Wang

2022 IEEE 33rd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2022 | Conference Paper |

Joint MIMO Detection and LDPC Decoding Via Enhanced Belief Propagation for 5G-NR

Jing Qian;Sha Hu;Hao Wang

2022 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2022 | Conference Paper |

Cited by: Papers (3)

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In this paper, we consider joint MIMO detection and LDPC decoding on a tripartite factor graph. Conventional method in this regard design a belief propagation (BP) detector that applies an matched filtering detection per layer by subtracting interferences from other layers, which is suboptimal. Further, the BP scheduling between detection and decoding is unoptimized, which makes the interaction le...Show More

Joint MIMO Detection and LDPC Decoding Via Enhanced Belief Propagation for 5G-NR

Jing Qian;Sha Hu;Hao Wang

2022 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2022 | Conference Paper |

Holographic MIMO Surfaces for 6G Wireless Networks: Opportunities, Challenges, and Trends

Chongwen Huang;Sha Hu;George C. Alexandropoulos;Alessio Zappone;Chau Yuen;Rui Zhang;Marco Di Renzo;Merouane Debbah

IEEE Wireless Communications

Year: 2020 | Volume: 27, Issue: 5 | Magazine Article |

Cited by: Papers (901)

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Future wireless networks are expected to evolve toward an intelligent and software reconfigurable paradigm enabling ubiquitous communications between humans and mobile devices. They will also be capable of sensing, controlling, and optimizing the wireless environment to fulfill the visions of low-power, high-throughput, massively- connected, and low-latency communications. A key conceptual enabler...Show More

Holographic MIMO Surfaces for 6G Wireless Networks: Opportunities, Challenges, and Trends

Chongwen Huang;Sha Hu;George C. Alexandropoulos;Alessio Zappone;Chau Yuen;Rui Zhang;Marco Di Renzo;Merouane Debbah

IEEE Wireless Communications

Year: 2020 | Volume: 27, Issue: 5 | Magazine Article |

Deep-Neural-Network Based Fall-Back Mechanism in Interference-Aware Receiver Design

Sha Hu;Wenquan Hu;Dzevdan Kapetanovic;Neng Wang

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Year: 2020 | Conference Paper |

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In this paper, we consider designing a fall-back mechanism in an interference-aware receiver. Typically, there are two types of detectors dealing with interference, known as enhanced interference rejection combining (eIRC) and symbol-level interference cancellation (SLIC). Although a SLIC detector performs better, it yields a higher complexity than an eIRC detector. Further, it requires knowledge ...Show More

Deep-Neural-Network Based Fall-Back Mechanism in Interference-Aware Receiver Design

Sha Hu;Wenquan Hu;Dzevdan Kapetanovic;Neng Wang

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Year: 2020 | Conference Paper |

Spherical Large Intelligent Surfaces

Sha Hu;Fredrik Rusek

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Year: 2020 | Conference Paper |

Cited by: Papers (13)

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As an emerging technology and evolution that goes beyond massive multi-input multi-output (MIMO), large intelligent surface (LIS) has gained much interest. LIS acts as an electromagnetic surface that can transmit, redirect, and receive radiating signals across its entire contiguous surface. It allows for unprecedented energy-focusing, data-transmission and terminal-positioning, and can fulfill the...Show More

Spherical Large Intelligent Surfaces

Sha Hu;Fredrik Rusek

ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

Year: 2020 | Conference Paper |

Modified Gold Sequence for Positioning Enhancement in NB-IoT

Guoda Tian;Hatem OdetAlla;Basuki E. Priyanto;Sha Hu;Fredrik Tufvesson

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2019 | Conference Paper |

Cited by: Papers (2)

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Positioning is an essential feature in Narrow-Band Internet-of-Things (NB-IoT) systems. Observed Time Difference of Arrival is one of the supported positioning techniques for NB-IoT. It utilizes the downlink NB positioning reference signal (NPRS) generated based on a length-31 Gold sequence. Although a Gold sequence has good auto-correlation and cross-correlation properties, the correlation proper...Show More

Modified Gold Sequence for Positioning Enhancement in NB-IoT

Guoda Tian;Hatem OdetAlla;Basuki E. Priyanto;Sha Hu;Fredrik Tufvesson

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2019 | Conference Paper |

On Time-of-Arrival Estimation in NB-IoT Systems

Sha Hu;Xuhong Li;Fredrik Rusek

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2019 | Conference Paper |

Cited by: Papers (8)

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We consider time-of-arrival (ToA) estimation for a device working in narrowband Internet-of-Things (NB-IoT) systems. Due to a limited 180 kHz bandwidth, the time-domain auto-correlation function (ACF) of transmitted NB positioning reference signal (NPRS) has a wide main-lobe. Without considering that, the performance of ToA estimation can be degraded for two reasons. Firstly, the NPRS correspondin...Show More

On Time-of-Arrival Estimation in NB-IoT Systems

Sha Hu;Xuhong Li;Fredrik Rusek

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2019 | Conference Paper |

Joint Modulus Zero-Forcing MIMO Detector

Sha Hu;Erik Leitinger

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2019 | Conference Paper |

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We propose an improvement over a modulus zero-forcing (MZF) detector proposed earlier in [1] for multi-input multi-output (MIMO) detection, namely, the joint MZF (JMZF) detector. The MZF detector provides better detection-performance than a traditional ZF detector through preserving controllable interferences, which are mitigated later by nonlinear modulus arithmetic operation. However, the MZF de...Show More

Joint Modulus Zero-Forcing MIMO Detector

Sha Hu;Erik Leitinger

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Year: 2019 | Conference Paper |

On Ergodic Capacity and Optimal Number of Tiers in UAV-Assisted Communication Systems

IEEE Transactions on Vehicular Technology

Year: 2019 | Volume: 68, Issue: 3 | Journal Article |

Cited by: Papers (9)

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In this paper, we consider unmanned aerial vehicle (UAV) assisted communication systems, where a number of UAVs are utilized as multi-tier relays between a number of users and a base-transceiver station (BTS). We model the wireless propagation channel between the users and the BTS as a Rayleigh product channel, which is a product of a series of independent and identically distributed (i.i.d.) Rayl...Show More

On Ergodic Capacity and Optimal Number of Tiers in UAV-Assisted Communication Systems

IEEE Transactions on Vehicular Technology

Year: 2019 | Volume: 68, Issue: 3 | Journal Article |

Unmanned Aerial Vehicle Assisted Cellular Communication

Sha Hu;Jose Flordelis;Fredrik Rusek;Ove Edfors

2018 IEEE Globecom Workshops (GC Wkshps)

Year: 2018 | Conference Paper |

Cited by: Papers (7)

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In this paper, we consider unmanned aerial vehicle (UAV) assisted cellular communications where UAVs are used as amplify-and-forward (AF) relays. The effective channel with UAV-assisted communication is modeled as a Rayleigh product channel, for which we derive a tight lower-bound of the ergodic capacity in closed-form. With the obtained lower-bound, trade-offs between the transmit power and the e...Show More

Unmanned Aerial Vehicle Assisted Cellular Communication

Sha Hu;Jose Flordelis;Fredrik Rusek;Ove Edfors

2018 IEEE Globecom Workshops (GC Wkshps)

Year: 2018 | Conference Paper |

Capacity Degradation with Modeling Hardware Impairment in Large Intelligent Surface

Sha Hu;Fredrik Rusek;Ove Edfors

2018 IEEE Global Communications Conference (GLOBECOM)

Year: 2018 | Conference Paper |

Cited by: Papers (48)

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In this paper, we consider capacity degradations stemming from potential hardware impairments (HWI) of newly proposed Large Intelligent Surface (LIS) systems. Without HWI, the utility of surface-area (the first-order derivative of the capacity with respect to surface-area) is shown to be proportional to the inverse of it. With HWI, the capacity as well as the utility of surface-area are both degra...Show More

Capacity Degradation with Modeling Hardware Impairment in Large Intelligent Surface

Sha Hu;Fredrik Rusek;Ove Edfors

2018 IEEE Global Communications Conference (GLOBECOM)

Year: 2018 | Conference Paper |

Modulus Zero-Forcing Detection for MIMO Channels

Sha Hu;Fredrik Rusek

2018 IEEE Global Communications Conference (GLOBECOM)

Year: 2018 | Conference Paper |

Cited by: Papers (3)

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We propose a modulus based zero-forcing (MZF) detector for multi-input multi-output (MIMO) channels. Traditionally, a ZF detector nulls out interference from other layers when detecting a certain layer. While this is conceptually simple, it can result in considerable noise-enhancement. In many communication systems, finite alphabets such as M quadrature-amplitude-modulation (QAM) are used, which c...Show More

Modulus Zero-Forcing Detection for MIMO Channels

Sha Hu;Fredrik Rusek

2018 IEEE Global Communications Conference (GLOBECOM)

Year: 2018 | Conference Paper |

User Assignment with Distributed Large Intelligent Surface (LIS) Systems

Sha Hu;Krishna Chitti;Fredrik Rusek;Ove Edfors

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2018 | Conference Paper |

Cited by: Papers (46)

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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 has a separate signal process unit (SPU) and is connected to a central process unit (CPU) that coordinates the behaviors of all the LIS-Units. With such a LIS system, we consider the user assignments both for sum-rate a...Show More

User Assignment with Distributed Large Intelligent Surface (LIS) Systems

Sha Hu;Krishna Chitti;Fredrik Rusek;Ove Edfors

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Year: 2018 | Conference Paper |

On the Design of Channel Shortening Demodulators for Iterative Receivers in Linear Vector Channels

Sha Hu;Fredrik Rusek

Year: 2018 | Volume: 6 | Journal Article |

Cited by: Papers (3)

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We consider designing demodulators for linear vector channels that use reduced-size trellis descriptions for the received signal. We assume an iterative receiver and use interference cancellation (IC) with soft-information provided by an outer decoder to mitigate the signal part that is not covered by a reduced-size trellis description. In order to reach a trellis description, a linear filter is a...Show More

On the Design of Channel Shortening Demodulators for Iterative Receivers in Linear Vector Channels

Sha Hu;Fredrik Rusek

Year: 2018 | Volume: 6 | Journal Article |

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