Hing Cheung So
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View article: Rotatable Antenna Aided Mixed Near-Field and Far-Field Communications in the Upper Mid-Band: Interference Analysis and Joint Optimization
Rotatable Antenna Aided Mixed Near-Field and Far-Field Communications in the Upper Mid-Band: Interference Analysis and Joint Optimization Open
In this paper, we propose to leverage rotatable antennas (RAs) for improving the communication performance in mixed near-field and far-field communication systems by exploiting a new spatial degree-of-freedom (DoF) offered by antenna rotat…
View article: Robust Rank-One Matrix Completion via Explicit Regularizer
Robust Rank-One Matrix Completion via Explicit Regularizer Open
In robust matrix completion (MC), the Welsch function, also referred to as the maximum correntropy criterion with Gaussian kernel, has been widely employed. However, it suffers from the drawback of down-weighing normal data. This work is t…
View article: Target Localization with Coprime Multistatic MIMO Radar via Coupled Canonical Polyadic Decomposition Based on Joint Eigenvalue Decomposition
Target Localization with Coprime Multistatic MIMO Radar via Coupled Canonical Polyadic Decomposition Based on Joint Eigenvalue Decomposition Open
This paper investigates target localization using a multistatic multiple-input multiple-output (MIMO) radar system with two distinct coprime array configurations: coprime L-shaped arrays and coprime planar arrays. The observed signals are …
View article: AROMA: Autonomous Rank-one Matrix Adaptation
AROMA: Autonomous Rank-one Matrix Adaptation Open
As large language models continue to grow in size, parameter-efficient fine-tuning (PEFT) has become increasingly crucial. While low-rank adaptation (LoRA) offers a solution through low-rank updates, its static rank allocation may yield su…
View article: A Hybrid Dynamic Subarray Architecture for Efficient DOA Estimation in THz Ultra-Massive Hybrid MIMO Systems
A Hybrid Dynamic Subarray Architecture for Efficient DOA Estimation in THz Ultra-Massive Hybrid MIMO Systems Open
Terahertz (THz) communication combined with ultra-massive multiple-input multiple-output (UM-MIMO) technology is promising for 6G wireless systems, where fast and precise direction-of-arrival (DOA) estimation is crucial for effective beamf…
View article: From Partial Calibration to Full Potential: A Two-Stage Sparse DOA Estimation for Incoherently-Distributed Sources with Gain-Phase Uncertainty
From Partial Calibration to Full Potential: A Two-Stage Sparse DOA Estimation for Incoherently-Distributed Sources with Gain-Phase Uncertainty Open
Direction-of-arrival (DOA) estimation for incoherently distributed (ID) sources is essential in multipath wireless communication scenarios, yet it remains challenging due to the combined effects of angular spread and gain-phase uncertainti…
View article: Target Localization with a Coprime Multistatic MIMO Radar via Coupled Canonical Polyadic Decomposition Based on Joint EVD
Target Localization with a Coprime Multistatic MIMO Radar via Coupled Canonical Polyadic Decomposition Based on Joint EVD Open
This paper addresses target localization using a multistatic multiple-input multiple-output (MIMO) radar system with coprime L-shaped receive arrays (CLsA). A target localization method is proposed by modeling the observed signals as tenso…
View article: Meta-Learning-Based Delayless Subband Adaptive Filter using Complex Self-Attention for Active Noise Control
Meta-Learning-Based Delayless Subband Adaptive Filter using Complex Self-Attention for Active Noise Control Open
Active noise control typically employs adaptive filtering to generate secondary noise, where the least mean square algorithm is the most widely used. However, traditional updating rules are linear and exhibit limited effectiveness in addre…
View article: Hybrid Data-Driven SSM for Interpretable and Label-Free mmWave Channel Prediction
Hybrid Data-Driven SSM for Interpretable and Label-Free mmWave Channel Prediction Open
Accurate prediction of mmWave time-varying channels is essential for mitigating the issue of channel aging in complex scenarios owing to high user mobility. Existing channel prediction methods have limitations: classical model-based method…
View article: An ADMM approach for elliptic positioning in non-line-of-sight environments
An ADMM approach for elliptic positioning in non-line-of-sight environments Open
Elliptic positioning (EP) has recently emerged as a prevailing subject within localization research, holding significant relevance for a variety of multistatic systems including distributed multiple-input multiple-output radar, sonar, and …
View article: Robust DOA Estimation With Distorted Sensors
Robust DOA Estimation With Distorted Sensors Open
The distorted sensors in an array system will degrade the signal-to-interference-plus-noise ratio of received signal, resulting in performance deterioration. Without knowing the number of source signals, this article focuses on direction-o…
View article: Received Signal Strength Characterization in Mixed LOS and NLOS Environments
Received Signal Strength Characterization in Mixed LOS and NLOS Environments Open
The received signal strength (RSS) measurement is widely adopted in wireless positioning due to its simplicity and accessibility. This paper utilizes the Boolean Line Model (BLM) to characterize the RSS distribution considering both line-o…
View article: One-Bit Target Detection in Collocated MIMO Radar with Colored Background Noise
One-Bit Target Detection in Collocated MIMO Radar with Colored Background Noise Open
One-bit sampling has emerged as a promising technique in multiple-input multiple-output (MIMO) radar systems due to its ability to significantly reduce data volume and processing requirements. Nevertheless, current detection methods have n…
View article: A Reliable Singular-Vector Pre-Coded OFDM-DCSK System Over Doubly Selective Fading Channels
A Reliable Singular-Vector Pre-Coded OFDM-DCSK System Over Doubly Selective Fading Channels Open
In this letter, we put forth a novel strategy to boost the reliability of orthogonal frequency division multiplexing differential chaos shift keying (OFDM-DCSK) systems over doubly selective fading channels. Provided the accessibility of c…
View article: Cramér–Rao Lower Bound Analysis for Elliptic Localization With Random Sensor Placements
Cramér–Rao Lower Bound Analysis for Elliptic Localization With Random Sensor Placements Open
Elliptic localization (EL) based on time-sum-of-arrival (TSOA) measurements has become popular due to its widespread applications in wireless sensor networks (WSNs) and distributed radar systems. While the performance limit of EL character…
View article: A semidefinite programming approach for robust elliptic localization
A semidefinite programming approach for robust elliptic localization Open
This short communication addresses the problem of elliptic localization with outlier measurements. Outliers are prevalent in various location-enabled applications, and can significantly compromise the positioning performance if not adequat…
View article: Sparse array design for MIMO radar in multipath scenarios
Sparse array design for MIMO radar in multipath scenarios Open
Sparse array designs have focused mostly on angular resolution, peak sidelobe level and directivity factor of virtual arrays for multiple-input multiple-output (MIMO) radar. The notion of the MIMO radar virtual array is based on the direct…
View article: Robust time-of-arrival localization via ADMM
Robust time-of-arrival localization via ADMM Open
This article considers the problem of source localization (SL) using possibly unreliable time-of-arrival (TOA) based range measurements. Adopting the strategy of statistical robustification, we formulate TOA SL as minimization of a versati…
View article: Co-Prime Sampling-Based Time-Delay Estimation for Roadway Survey by Ground Penetrating Radar via Off-Grid Sparse Bayesian Learning
Co-Prime Sampling-Based Time-Delay Estimation for Roadway Survey by Ground Penetrating Radar via Off-Grid Sparse Bayesian Learning Open
International audience
View article: One-Bit Spectrum Sensing for Cognitive Radio
One-Bit Spectrum Sensing for Cognitive Radio Open
The work of D. Ramíırez was partially supported by MCIN/AEI/10.13039/501100011033/FEDER, UE, under grant PID2021-123182OB-I00 (EPiCENTER) and by the Office of Naval Research (ONR) Global under contract N62909-23-1-2002. The work of Lei Hua…
View article: Constant Modulus Waveform Estimation and Interference Suppression via Two-Stage Fractional Program-Based Beamforming
Constant Modulus Waveform Estimation and Interference Suppression via Two-Stage Fractional Program-Based Beamforming Open
In radar and communication systems, there exist a large class of signals with constant modulus property, including BPSK, QPSK, LFM, and phase-coded signals. In this paper, we focus on the problem of joint constant modulus waveform estimati…
View article: Precise Motion Compensation Approach for High-Resolution Multirotor UAV SAR in the Presence of Multiple Errors
Precise Motion Compensation Approach for High-Resolution Multirotor UAV SAR in the Presence of Multiple Errors Open
As an important supplement to traditional airborne synthetic aperture radar (SAR), multirotor unmanned aerial vehicle (UAV) SAR has the advantages of low cost, high flexibility, and strong survival ability. However, due to the complex moti…
View article: 3D Multi-Target Localization Via Intelligent Reflecting Surface: Protocol and Analysis
3D Multi-Target Localization Via Intelligent Reflecting Surface: Protocol and Analysis Open
With the emerging environment-aware applications, ubiquitous sensing is expected to play a key role in future networks. In this paper, we study a 3-dimensional (3D) multi-target localization system where multiple intelligent reflecting sur…