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In order to improve the spectrum utilization rate of Device-to-Device (D2D) communication, we study the hybrid resource allocation problem, which allows both the resource reuse and resource dedicated mode to work simultaneously. Meanwhile, multiple D2D devices are permitted to share uplink cellular resources with some designated cellular user equipment (CUE). Combined with the transmission requirement...
This paper considers the virtual cell(VC) association and multi cell scheduling in Ultra-Dense Network for sum-rate maximization where multi dimensional resources allocation strategy is coupled and interference environment is complex. For virtual cells association, a metric is proposed which is transformed from the non-convex problem via a series of decouples and captures the gain of multi user diversity...
A microstrip ring antenna is optimized for non-invasive blood glucose monitoring. The main objective is to maximize the sensitivity of antenna w.r.t. the change of concentration of aqueous glucose solution. The parameterized antenna model and solution model are simulated in CST Microwave Studio in order to evaluate the sensitivity of the antenna design. The design process is implemented through a...
Nowadays the task of tracking pedestrians is often addressed within a tracking-by-detection framework, which in most cases entails that the position of each target has been detected before tracking begins. However in some cases, a pedestrian who is being tracked may be obscured by other targets or obstacles, and during this period they may change their trajectory or speed (track drift), and sometimes...
In long haul telecommunications optical fibers are perfect waveguides for light. However, the monitoring of the transmitted optical power generally demands the conversion from optical pulses into electrical signals, which relies on discrete photodetectors made by silicon or III-V materials. Here, we report an integrated fiber-optic detector by dip coating PbS colloidal quantum dots onto a pretreated...
Recently, wireless sensor in the video surveillance system plays an important role, but the sensor operation is limited by battery capacity. Obviously, the technique to reduce power consumption is necessary. In this paper, a novel lossless embedded compression (EC) algorithm is proposed to reduce the memory bandwidth in video coding. It comprises two core techniques of Multi-directional Gradient Detection...
In massive multiple-input multiple-output (MIMO) systems, linear minimum mean-square error (MMSE) detection can achieve near-optimal performance. However, it suffers from high computational complexity due to the involvement of matrix inversion. This issue becomes severer when user number (U) and receive antenna number (S) increase. Existing approaches such as Neumann series expansion method, Gauss-Seidel...
We experimentally demonstrate a six-port passive circuit supporting all-optical ordered-route transmission using thermo-optic effect. The 15-dB bandwidth (BW) is larger than 0.05 nm and the maximum blocking extinction ratio (BER) is 39 dB.
We have witnessed a dramatic increase in national cyberinfrastructure resources to support data-driven research. Orchestrating these resources to enable the creation of collaborative infrastructure capable of supporting data intensive activities is challenging. In this work we present RADII, a novel architecture and system that enables the provisioning and configuration of collaborative infrastructure...
A 30GSsps 6bit current-steering digital-to-analog converter (DAC) in SiGe BiCMOS technology is present in this paper. The DAC core works in a double-sampling way, which reduces the maximum clock frequency by half. In order to suppress the frequency spur induced by double-sampling, a duty cycle correction circuit is implemented. 24 high speed serial data receivers running up to 7.5Gbps per-lane and...
Cloud computing is becoming the real world tendency of IT model that offers flexible and on-demand service, most of which adopt Software-Defined Networking (SDN) as their network architecture to simplify network management and ensure network isolation. While there seems integration for cloud and SDN providing a more robust and secure IT services, the new challenges also occur with the marriage of...
Big data has become ubiquitous as high volumes of wide varieties of valuable data of different veracities (e.g., precise, imprecise or uncertain data) are made available at a high velocity through fast throughput machines and techniques for data gathering and curation in many real life applications in various domains and application areas such as bioinformatics, biomedicine, finance, social networking,...
Nowadays, streams of data can be continuously generated by sensors in various real-life applications such as environment surveillance. Partially due to the inherited limitation of the sensors, data in these streams can be uncertain. To discover useful knowledge in the form of frequent patterns from streams of uncertain data, a few algorithms have been developed. They mostly use the sliding window...
With the ever increasing number of user terminals and fast-growing demands for local service, D2D (Device-to-Device) relay communication technology is becoming essential to the next generation mobile networks, where an efficient relay selection scheme not only improves the system performance but also conserves energy consumption. Aiming at encouraging relay node to voluntarily forward data and regarding...
By reuse the resource of existing cellular users, D2D (Device-to-Device) communication underlaying cellular network can improve the spectrum utilization rate and reduce the power consumption of mobile terminals. However, it will also bring interference to the existing cellular network. How to effectively restrain the interference caused by resource reuse has become the most important factor that affects...
In many applications, web surfers would like to get recommendation on which collections of web pages that would be interested to them or that they should follow. In order to discover this information and make recommendation, data mining in general—or frequent pattern mining in specific—can be applicable. Since its introduction, frequent pattern mining has drawn attention from many researchers. Consequently,...
Visual analytics on frequent web usage patterns aims to help users to (i) analyze the data so as to discover implicit, previously unknown and potentially useful information in the form of collections of frequently visited web pages in a single session and to (ii) visually represent the discovered knowledge so as to gain insight about the data. In this paper, we propose an interactive visual analytics...
Sparse code multiple access (SCMA) is a new modulation and non-orthogonal multiple access scheme for 5G systems, in which the coded bits are mapped to multidimensional sparse codewords, and the message passing algorithm (MPA) is employed to detect multi-user signals. Device-to-Device communications underlaying cellular network is also a key technique in 5G networks; hence the sparse codes allocation...
In this paper, we develop a quadrotor UAV based target tracking and recognition system, which includes an intelligent gimbal sub-system for accurate camera positioning and fast image processing. A set of robust consensus-based algorithms are developed for objects tracking, in addition to moving background processing techniques. A neural network learning based database is used to improve target recognition...
In this paper, we develop an adaptive nonlinear controller based on dynamic inversion and neural network for quadrotor UAVs in the presence of uncertainties in UAV and actuator dynamics. The basic control law is first designed by using conventional PID control, and then the nonlinear dynamic inversion control is provided for the purpose of stabilization and robustness. The neural network is used to...
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