A5020274552- Advanced MIMO Systems Optimization
- Cooperative Communication and Network Coding
- GNSS positioning and interference
- Advanced Wireless Communication Techniques
- Inertial Sensor and Navigation
- Geophysics and Gravity Measurements
- Satellite Communication Systems
- High Entropy Alloys Studies
- Opportunistic and Delay-Tolerant Networks
- Antenna Design and Analysis
- Additive Manufacturing Materials and Processes
- Mobile Agent-Based Network Management
- Millimeter-Wave Propagation and Modeling
- Indoor and Outdoor Localization Technologies
- Network Traffic and Congestion Control
- IPv6, Mobility, Handover, Networks, Security
- Additive Manufacturing and 3D Printing Technologies
- Sparse and Compressive Sensing Techniques
- Planetary Science and Exploration
- Optimization and Search Problems
- Nanoplatforms for cancer theranostics
- Image and Object Detection Techniques
- Cryptographic Implementations and Security
- Distributed and Parallel Computing Systems
- Advanced Image Fusion Techniques
Peking University
2018-2024
Tianjin University of Science and Technology
2024
Shandong Academy of Pharmaceutical Sciences
2024
Shandong University
2024
National Space Science Center
2007-2023
Guizhou Normal University
2023
Shanghai Jiao Tong University
2023
Chinese Academy of Sciences
2010-2021
Huawei Technologies (China)
2016-2020
Shanghai Astronomical Observatory
2019
Common signals in public channels of cellular systems should be transmitted omnidirectionally from the base station (BS) to ensure cell-wide coverage. In this paper, we propose an omnidirectional precoding (OP) based transmission for massive MIMO systems, which leads a significant reduction downlink pilot overhead while providing signaling. For OP transmission, present three necessary conditions that matrix satisfy, meet requirements reliable coverage, equal average power on each antenna...
In this paper, the design of robust linear precoders for massive multi-input-multi-output (MIMO) downlink with imperfect channel state information (CSI) is investigated. The CSI each UE obtained at BS modeled as statistical under a jointly correlated model both mean and variance information, which includes effects estimation error, aging, spatial correlation. objective to maximize expected weighted sum-rate. By combining minorize-maximize (MM) algorithm deterministic equivalent method, an...
In this paper, we design space-time block codes (STBCs) to broadcast the common information omnidirectionally in a massive multiple-input multiple-output downlink. To reduce burden of downlink channel estimation and achieve partial spatial diversity from base station (BS) transmit antennas, propose channel-independently precoded low-dimensional STBC. The precoding matrix signal constellation STBC are jointly designed guarantee omnidirectional coverage at any instant time sufficiently utilize...
3D Gaussian Splatting (3DGS) has been widely used in reconstruction and generation. Training to get a 3DGS scene often takes lot of time resources even valuable inspiration. The increasing amount digital asset have brought great challenges the copyright protection. However, it still lacks profound exploration targeted at 3DGS. In this paper, we propose new framework X-SG$^2$S which can simultaneously watermark 1 messages while keeping original almost unchanged. Generally, injector for adding...
In this paper, we investigate the omnidirectional precoding for three dimensional (3D) massive multi-input multi-output (MIMO) with uniform planar arrays (UPAs). The precoder is designed public information transmission, where channel state (CSI) usually not available at base station (BS) and would like to guarantee a performance all users regardless of their angular positions. Thus, first design objective matrices satisfy property, which means that received mean power constant any angle. To...
In this paper, we design the precoding matrices at base station side and combining user terminal for initial downlink synchronization in millimeter wave massive multiple-input multiple-output systems. First, demonstrate two basic requirements matrices, including that all entries therein should have constant amplitude under implementation architecture constraint, average transmission power over total K time slots taking be any spatial direction. Then, derive optimal detector based on...
In this paper, we design the precoding matrix with broad coverage for massive multi-input multi-output public channels. order to guarantee efficient use of power amplifiers and improve achievable ergodic rate, equal transmit per-antenna semi-unitary constraints on are considered simultaneously. Within framework manifold optimization, under above two becomes an optimization problem over intersection oblique Stiefel manifold. We propose steepest descent method these manifolds obtain optimal...
The common signals in public channels of cellular networks should be transmitted omni-directionally from the base station to guarantee reliable coverage. In this paper, we propose a transmission scheme for massive MIMO systems based on precoding-extended Alamouti code. This proposed space-time code has following four features: 1) signal is omni-directional, i.e., its DFT constant-envelope; 2) each antenna constant-envelope achieve highest power-efficiency; 3) maximum diversity order 2 can...
This paper introduces an interferometric imaging altimeter system designed for both ocean and land observations. sensor combines the functions of radar SAR together is aimed to provide centimeter- level accuracy topography meter-level land. With interferometry technique, a wide swath 80 km achieved, with synthetic aperture resolution 100 m observation achieved. System design outlined some preliminary results are presented.
Common signals in public channels of cellular systems should be transmitted omnidirectionally from the base station (BS) to ensure cell-wide coverage. In this paper, we propose two omnidirectional space-time block codes (STBCs), being referred as precoded Alamouti code and quasi-orthogonal STBC (QOSTBC), respectively, provide signaling with spatial diversity for massive MIMO systems. Both these schemes are low downlink pilot overhead can guarantee transmission equal-power per antenna...
Image segmentation is always very important for computer vision and pattern recognition. Moreover, how to fast extract objects from a given image still problem real time processing. Most of the traditional region-based models depend on global information converge minimum error segmentation, but they are time-consuming, result in no effective segmentation. In this paper, we propose model with weight matrix detect based least square method. The basic ideal our build up functional by...
Space wideband information network technology is one of the hot technologies in studying space technology, there are many difficult need to be solved, for example, connection and communication between ground heterogeneous network, algorithm mobile routing, etc. The paper does research on these problems based IP CCSDS protocol that special communication, proposes an approach using over mode, then it designs a data transmission configuration stack model space/ground end, analyses how perform...
The focus of this paper is dynamic link allocation algorithms for sharing the limited resources tracking and data relay satellites (TDRS) system among many burst users with varying quality service (QoS) requirements. task scheduling communications between TDRS spacecraft getting more critical since an increasing number must communicate ground station by TDRS. In such a congested scenario, current practice, in which experts build hand-made schedules, often leaves large communication requests...