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Found 47 papers, 5 papers with code
Frugal RIS-aided 3D Localization with CFO under LoS and NLoS Conditions
In this paper, we investigate 3-D localization and frequency synchronization with multiple reconfigurable intelligent surfaces (RISs) in the presence of carrier frequency offset (CFO) for a stationary user equipment (UE).
RIS-Aided Bistatic Radar for Rapid NLOS Sensing in the Teraharetz Band
Moreover, we propose an iterative maximum likelihood estimation (MLE) scheme to yield the optimum sensing accuracy, converging to Cramer-Rao lower bound (CRLB).
Multicarrier ISAC: Advances in Waveform Design, Signal Processing and Learning under Non-Idealities
This paper addresses the topic of integrated sensing and communications (ISAC) in 5G and emerging 6G wireless networks.
V2X Sidelink Positioning in FR1: From Ray-Tracing and Channel Estimation to Bayesian Tracking
Sidelink positioning research predominantly focuses on the snapshot positioning problem, often within the mmWave band.
The Integrated Sensing and Communication Revolution for 6G: Vision, Techniques, and Applications
Future wireless networks will integrate sensing, learning and communication to provide new services beyond communication and to become more resilient.
Fundamental Trade-Offs in Monostatic ISAC: A Holistic Investigation Towards 6G
This paper undertakes a holistic investigation of two fundamental trade-offs in monostatic OFDM integrated sensing and communication (ISAC) systems-namely, the time-frequency trade-off and the spatial trade-off, originating from the choice of modulation order for random data and the design of beamforming strategies, respectively.
Subspace-Based Detection in OFDM ISAC Systems under Different Constellations
This paper investigates subspace-based target detection in OFDM integrated sensing and communications (ISAC) systems, considering the impact of various constellations.
RIS-Aided NLoS Monostatic Sensing under Mobility and Angle-Doppler Coupling
We investigate the problem of reconfigurable intelligent surface (RIS)-aided monostatic sensing of a mobile target under line-of-sight (LoS) blockage considering a single antenna, full-duplex, and dual-functional radar-communications base station (BS).
Enhancing Sensing-Assisted Communications in Cluttered Indoor Environments through Background Subtraction
Integrated sensing and communications (ISAC) is poised to be a native technology for the forthcoming Sixth Generation (6G) era, with an emphasis on its potential to enhance communications performance through the integration of sensing information, i. e., sensing-assisted communications (SAC).
Deceptive Jamming in WLAN Sensing
Joint Communication and Sensing (JCAS) is taking its first shape in WLAN sensing under IEEE 802. 11bf, where standardized WLAN signals and protocols are exploited to enable radar-like sensing.
Millimeter-wave Radio SLAM: End-to-End Processing Methods and Experimental Validation
In this article, we address the timely topic of cellular bistatic simultaneous localization and mapping (SLAM) with specific focus on end-to-end processing solutions, from raw I/Q samples, via channel parameter estimation to user equipment (UE) and landmark location information in millimeter-wave (mmWave) networks, with minimal prior knowledge.
RIS-Enabled NLoS Near-Field Joint Position and Velocity Estimation under User Mobility
In the context of single-base station (BS) non-line-of-sight (NLoS) single-epoch localization with the aid of a reflective reconfigurable intelligent surface (RIS), this paper introduces a novel three-step algorithm that jointly estimates the position and velocity of a mobile user equipment (UE), while compensating for the Doppler effects observed in near-field (NF) at the RIS elements over the short transmission duration of a sequence of downlink (DL) pilot symbols.
V2X Sidelink Positioning in FR1: Scenarios, Algorithms, and Performance Evaluation
In this paper, we investigate sub-6 GHz V2X sidelink positioning scenarios in 5G vehicular networks through a comprehensive end-to-end methodology encompassing ray-tracing-based channel modeling, novel theoretical performance bounds, high-resolution channel parameter estimation, and geometric positioning using a round-trip-time (RTT) protocol.
Semi-Supervised End-to-End Learning for Integrated Sensing and Communications
Integrated sensing and communications (ISAC) is envisioned as one of the key enablers of next-generation wireless systems, offering improved hardware, spectral, and energy efficiencies.
6G Positioning and Sensing Through the Lens of Sustainability, Inclusiveness, and Trustworthiness
6G promises a paradigm shift in which positioning and sensing are inherently integrated, enhancing not only the communication performance but also enabling location- and context-aware services.
Model-Based End-to-End Learning for Multi-Target Integrated Sensing and Communication
We study model-based end-to-end learning in the context of integrated sensing and communication (ISAC) under hardware impairments.
Integrated Sensing and Communications with MIMO-OTFS
For the search mode, we introduce the concept of delay-Doppler (DD) multiplexing, enabling omnidirectional probing of the environment and large virtual array at the OTFS radar receiver.
Performance of RIS-Aided Nearfield Localization under Beams Approximation from Real Hardware Characterization
The technology of reconfigurable intelligent surfaces (RIS) has been showing promising potential in a variety of applications relying on Beyond-5G networks.
Multi-RIS-Enabled 3D Sidelink Positioning
Positioning is expected to be a core function in intelligent transportation systems (ITSs) to support communication and location-based services, such as autonomous driving, traffic control, etc.
RIS-aided Localization under Pixel Failures
Reconfigurable intelligent surfaces (RISs) hold great potential as one of the key technological enablers for beyond-5G wireless networks, improving localization and communication performance under line-of-sight (LoS) blockage conditions.
Uplink Joint Positioning and Synchronization in Cell-Free Deployments with Radio Stripes
Radio stripes (RSs) is an emerging technology in beyond 5G and 6G wireless networks to support the deployment of cell-free architectures.
ESPRIT-Oriented Precoder Design for mmWave Channel Estimation
We consider the problem of ESPRIT-oriented precoder design for beamspace angle-of-departure (AoD) estimation in downlink mmWave multiple-input single-output communications.
Modeling and Analysis of OFDM-based 5G/6G Localization under Hardware Impairments
Our extensive simulation results demonstrate that each type of HWI leads to a different level of degradation in angle and delay estimation performance, and the prominent impairment factors on delay estimation will have a dominant negative effect on SER.
Model-Driven End-to-End Learning for Integrated Sensing and Communication
Integrated sensing and communication (ISAC) is envisioned to be one of the pillars of 6G.
RIS-Enabled and Access-Point-Free Simultaneous Radio Localization and Mapping
In the upcoming sixth generation (6G) of wireless communication systems, reconfigurable intelligent surfaces~(RISs) are regarded as one of the promising technological enablers, which can provide programmable signal propagation.
On the Impact of Phase Noise on Monostatic Sensing in OFDM ISAC Systems
Phase noise (PN) can become a major bottleneck for integrated sensing and communications (ISAC) systems towards 6G wireless networks.
RIS-Enabled SISO Localization under User Mobility and Spatial-Wideband Effects
Specifically, we observe that the state of the user with a high speed (42 m/s) can be estimated virtually with the same accuracy as a static user.
Positioning and Sensing in 6G: Gaps, Challenges, and Opportunities
Among the key differentiators of 6G compared to 5G will be the increased emphasis on radio based positioning and sensing.
Analysis of V2X Sidelink Positioning in sub-6 GHz
Radio positioning is an important part of joint communication and sensing in beyond 5G communication systems.
Spatial Signal Design for Positioning via End-to-End Learning
This letter considers the problem of end-to-end learning for joint optimization of transmitter precoding and receiver processing for mmWave downlink positioning.
Channel Model Mismatch Analysis for XL-MIMO Systems from a Localization Perspective
Radio localization is applied in high-frequency (e. g., mmWave and THz) systems to support communication and to provide location-based services without extra infrastructure.
On the Impact of Hardware Impairments on RIS-aided Localization
We investigate a reconfigurable intelligent surface (RIS)-aided near-field localization system with single-antenna user equipment (UE) and base station (BS) under hardware impairments by considering a practical phase-dependent RIS amplitude variations model.
6G Radio Requirements to Support Integrated Communication, Localization, and Sensing
6G will be characterized by extreme use cases, not only for communication, but also for localization, and sensing.
Monostatic Sensing with OFDM under Phase Noise: From Mitigation to Exploitation
We consider the problem of monostatic radar sensing with orthogonal frequency-division multiplexing (OFDM) joint radar-communications (JRC) systems in the presence of phase noise (PN) caused by oscillator imperfections.
RIS-aided Joint Localization and Synchronization with a Single-Antenna Receiver: Beamforming Design and Low-Complexity Estimation
In this paper, a novel low-complexity method for joint localization and synchronization based on an optimized design of the base station (BS) active precoding and RIS passive phase profiles is proposed, for the challenging case of a single-antenna receiver.
RIS-aided Near-Field Localization under Phase-Dependent Amplitude Variations
The proposed method can successfully recover the performance loss of the AMML under a wide range of RIS parameters and effectively calibrate the RIS amplitude model online with the help of a user that has an a-priori unknown location.
MCRB-based Performance Analysis of 6G Localization under Hardware Impairments
Location information is expected to be the key to meeting the needs of communication and context-aware services in 6G systems.
End-to-End Learning for Integrated Sensing and Communication
The approach includes the proposal of the AE architecture, a novel ISAC loss function, and the training procedure.
Integration of Communication and Sensing in 6G: a Joint Industrial and Academic Perspective
6G will likely be the first generation of mobile communication that will feature tight integration of localization and sensing with communication functionalities.
Optimal Spatial Signal Design for mmWave Positioning under Imperfect Synchronization
We consider the problem of spatial signal design for multipath-assisted mmWave positioning under limited prior knowledge on the user's location and clock bias.
Semi-Passive 3D Positioning of Multiple RIS-Enabled Users
In this work, we study the application of RIS in a multi-user passive localization scenario, where we have one transmitter (Tx) and multiple asynchronous receivers (Rxs) with known locations.
Radar Sensing with OTFS: Embracing ISI and ICI to Surpass the Ambiguity Barrier
Orthogonal time frequency space (OTFS) is a promising alternative to orthogonal frequency division multiplexing (OFDM) in high-mobility beyond 5G communications.
MIMO-OFDM Joint Radar-Communications: Is ICI Friend or Foe?
For each estimated angle, we next formulate the radar delay-Doppler estimation as a joint carrier frequency offset (CFO) and channel estimation problem via an APES (amplitude and phase estimation) spatial filtering approach by transforming the delay-Doppler parameterized radar channel into an unstructured form.
Millimeter-wave Mobile Sensing and Environment Mapping: Models, Algorithms and Validation
Integrating efficient connectivity, positioning and sensing functionalities into 5G New Radio (NR) and beyond mobile cellular systems is one timely research paradigm, especially at mm-wave and sub-THz bands.
ICI-Aware Parameter Estimation for MIMO-OFDM Radar via APES Spatial Filtering
We propose a novel three-stage delay-Doppler-angle estimation algorithm for a MIMO-OFDM radar in the presence of inter-carrier interference (ICI).
SISO RIS-Enabled Joint 3D Downlink Localization and Synchronization
We consider the problem of joint three-dimensional localization and synchronization for a single-input single-output (SISO) system in the presence of a reconfigurable intelligent surface (RIS), equipped with a uniform planar array.
Signal Processing Information Theory Information Theory
Near-field Localization with a Reconfigurable Intelligent Surface Acting as Lens
Exploiting wavefront curvature enables localization with limited infrastructure and hardware complexity.
Signal Processing Information Theory Information Theory
