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Tao Dong - IEEE Xplore Author Profile

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Low Earth orbit (LEO) satellite networks exhibit distinct characteristics, e.g., limited resources of individual satellite nodes and dynamic network topology, which have brought many challenges for routing algorithms. To satisfy quality of service (QoS) requirements of various users, it is critical to research efficient routing strategies to fully utilize satellite resources. This paper proposes a...Show More
In this letter, we introduce a low-cost, independently dual-polarized electronically scanned array. It incorporates two orthogonal microstrip dipoles with miniaturized cascaded 90$^\circ$ phase shifter to achieve a dual-channel configuration, which improves the capabilities of antenna. By manipulating the states of p-i-n diodes, it becomes possible to precisely control over the radiation patterns....Show More
To provide low-latency broadband Internet globally, SpaceX, Amazon, and other companies plan to launch thousands of satellites into low Earth orbit. The proposed constellations hold great promise, but they also present new networking challenges. It is crucial that mega-constellation networks discover their topology accurately and in a timely manner. Due to the mobility of LEO satellites, it is par...Show More
In this article, we introduce a low-cost and modular microstrip phased-array antenna, which is integrated with a 2-bit phase shifter. This module consists of a 16-element, 2-bit phase resolution, and a cooperative dc control board. The antenna subarray adopts a hexagonal aperture, and these left-handed circular polarization (LHCP) antenna elements are arranged in sparse array. Utilizing the combin...Show More
A novel dynamic distributed time-modulated array (DD-TMA) that uses 2-bit phase control for continuous beam scanning directional modulation (DM) is presented. The element positions of the DD-TMA change randomly and can be easily implemented by using single-pole double-throw (SPDT) switches and redundant elements. The position of each array element follows a Bernoulli distribution, resulting in a r...Show More
As an important complement to the terrestrial network and an essential component of the future 6G, Low Earth Orbit (LEO) satellite network is expected to provide higher-quality communication services in combination with terrestrial network and attracts widespread research interest. Since the unbalanced distribution of terrestrial services may lead to inter-satellite link (ISL) congestion, balancin...Show More
A low-cost, dual-circularly-polarized (CP) 2 bit antenna working at 10 GHz is reported in this work. The antenna element utilizes a square-ring patch as a radiator. By selecting the feeding direction of the T-shaped coupling microstrip line and the position of the perturbation corner, the 2 bit phase of 0°, 90°, 180°, 270° and the CP reconfigurability can be realized. An eight-element linear array...Show More
In this letter, a low-cost, series–parallel-fed 2-bit phased array antenna for $Ku$-band 1-D beam scanning application is presented. The compact 2-bit element consists of a microstrip patch with 0$^\circ /180^\circ$ phase states, dc bias circuits, ground, and a cascaded 90$^\circ$ phase shifter. Using the proposed element, a series–parallel-fed 9 × 8 array is fabricated and measured. Experimental ...Show More
Relying on space-air-ground (SAG)-integrated artificial intelligence of everything (AIoE) networks, massive computation-intensive and latency-sensitive tasks can be efficiently either executed locally by ground AIoE users, or offloaded to SAG servers, such as remote base stations, aerial high altitude platform (HAP) and low earth orbit satellites. However, joint optimization of communication and c...Show More
This paper mainly designs an antenna feed system based on vortex waves at 2.4GHz, and uses linearly polarized circular antenna arrays to generate vortex waves. Multimodal simultaneous transmission is possible by feeding the array with a butler matrix. After that, the system is tested, and the results show that its modal isolation meets the design requirements, and it can be used as a new multiplex...Show More
The scattering characteristics of radar antenna cavity located at the nose of aircrafts have been widely studied. While there are still a lot of shallow cavities on the back or belly of the fuselage for the placement of conformal antennas, these cavities usually need to deal with the grazing incidence of radar waves. RCS reduction under such circumstances are still rarely studied. This paper will ...Show More
Traditional network traffic scheduling algorithms are difficult to accurately analyze and model. In the face of satellite networks with complex network structures, diverse transmission resources, and high dynamics, routing strategies lack flexibility. In order to reduce the possibility of network congestion in the multi-layer satellite network, a satellite network traffic scheduling algorithm base...Show More
Although mobile cloud computing can provide flexible services to computation-intensive applications, its wide network span makes low latency a thorny problem. By deploying cloud resources on the edge of the network, mobile edge computing has an inherent advantage in providing quality of services due to the proximity to mobile devices. However, the capability of computing resources deployed on edge...Show More
In this paper, a jigsaw-shaped bandpass frequency selective surface (JS-FSS) is presented for conformal application. As the structure must mechanically be flexible to allow for bending without possible cracks of the printed lines, the periodic conducting cells are chosen to have spring-like joins. Inspired by mortise and tenon joinery of the ancient Chinese wooden architecture, a novel JS-FSS has ...Show More
A low-profile shared-aperture dual-band broadband antenna array for potential applications in synthetic aperture radars (SARs) is presented. The proposed antenna array operates in L- and C-bands with a frequency ratio of 1:3.3. The C-band elements are selected as stacked microstrip dipoles, which employ stepped gradient structure to broaden the bandwidth. The L-band elements are selected as perfor...Show More
The rapid development of virtual network architecture makes it possible for wireless network to be widely used. With the popularity of artificial intelligence (AI) industry in daily life, efficient resource allocation of wireless network has become a problem. Especially when network users request wireless network resources from different management domains, they still face many practical problems....Show More
With the improvement of people’s living standards, more and more network users access the network, including a large number of infrastructure, these devices constitute the Internet of things(IoT). With the rapid expansion of devices in the IoT, the data transmission between the IoT has become more complex, and the security issues are facing greater challenges. SDN as a mature network architecture,...Show More
A review of photonic integrated optical phased array (OPA) for space optical communication is presented. We review and summarize the typical works of the photonic integrated OPAs with one-dimensional and two-dimensional optical antenna array in recent years. The basic components of the photonic integrated OPA are introduced separately, including optical coupler, optical power division network, pha...Show More
The existing optical performance monitoring (OPM) scheme based on deep neural network has no selection capability of the input data. They always accept and process all, which may result in serious monitoring errors and reduce the credibility of the monitoring system. Because the transmitted data in the future heterogeneous fiber-optic networks are diverse, and it's likely to exceed the scope of th...Show More
A novel bow-tie antenna for 400 MHz ground penetrating radar (GPR) is proposed in this paper. Different from the conventional bow-tie antennal, one semicircular structure is added to each of the radiation arm. Simulation results show that a relative bandwidth of 100% can be achieved with the operation frequency ranging from 200 MHz to 600 MHz, indicating a 16% increased bandwidth compared with the...Show More
A novel 16 Gb/s free-space optical communication scheme based on amplitude modulation employing both femtosecond fiber laser and continuous-wave laser is proposed and evaluated, which can be used for future integration of satellite communication and ranging.Show More
In this paper, we proposed an optical communication system adjusting method for the geostationary-earth-orbit (GEO) satellites. The proposal is demonstrated and evaluated by theoretical analysis and experiments. It is able to guarantee not only the coherent detection communications among the GEO satellites but also the direct detection communications between the GEO satellite and the low-earth-orb...Show More
Software defined integrated space ground networks are playing an indispensable role in the next generation network. In this paper, we proposed a simulation platform of SDN enabled space ground integrated networks. On this platform, most satellites are switches to forward the data based on flow-tables provided by SDN controllers located on the highest layer to take responsibility of centralized con...Show More