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In this paper, we propose a novel approach to cancel Self-interference (SI) signal in analog domain in Full-duplex (FD) communication system. This approach is based on self-mixing and called Self-Mixed Self-Interference Analog Cancellation (SM-SIAC) where three feedback loops are employed for auto-tuning. In condition that these loops converge, we analyze the cancellation performance.
This paper presents a novel dipole bow-tie slot antenna on silicon substrate operating at 94-GHz for imaging applications. The proposed antenna consists of a differentially fed printed folded dipole cut away from the 0.2-µm aluminum above the 1.2-µm silicon dioxide (SiO2) layer built on the 380-µm thick silicon substrate. To increase the antenna impedance bandwidth, a bow-tie slot is added to the...
The densely deployed Access Points (APs) have overlapping coverage areas. In the hotspot area, a user can usually receive signals of more than ten APs. The signal-based association in IEEE 802.11 may result in significant unbalanced loads among APs. Moreover, diverse user demands on bandwidth further exacerbate the load unbalance. Some APs are too overloaded when multiple high-demand users gather...
Recently, tremendous utilization of wireless networks has led to sever scarcity of radio spectrum resources. TV White Spaces (TVWSs) as novel bands enabling Cognitive Radio (CR) technology to improve spectrum resources utilization, have attracted significant standardisation efforts such as IEEE 802.11af, IEEE 802.16h and 802.22. As these heterogeneous networks may operate on the same channels of TVWSs,...
Cooperative spectrum sharing increases the spectrum efficiency and improves the performance of primary users (PUs) in cognitive radio domain. This paper proposes an energy-aware dynamic spectrum sharing framework, named Cooperative Spectrum Sharing with Energy-save(CSSE), which maximizes energy saving while ensures communication QoS (i.e. transmission rate) of primary transmitter (PT). In CSSE, the...
In this paper, a large 2.5D glass interposer is demonstrated with 50 um chip-level interconnect (FLI), 3/3 um line and space (L/S) escape routing, and six metal layers, which are targeted for JEDEC high bandwidth memory (HBM). Our routing design suggests that double sided panel processing with 3/3 um L/S can accommodate required signal lines for HBM. Then, 3/3 um L/S transmission lines on 25mm × 30mm...
The design of an integrated charge-sensitive preamplifier suitable for γ-ray spectroscopy is presented. It is fully integrated, except for the feedback resistor, and can drive directly a 50Ω cable with its low impedance output stage. It is designed in AMS 0.35µm technology and its small dimensions and low power consumption (10 mW) are optimized for multi-channel applications. It works both with germanium...
Universal access to Internet is crucial, and as such, there have been several initiatives to enable wider access to the Internet. Public AccessWiFi Service (PAWS) is one such initiative that takes advantage of the the available unused capacity in home broadband connections and allows Less-than-Best Effort (LBE) access to these resources, as advocated by Lowest Cost Denominator Networking (LCDNet)...
Scanning large amounts of bandwidth for anomalous signals is a fundamental tool to building secure spectrum sharing system. When designing a bandwidth scanning algorithm, the system engineer faces several problems: which band to scan, how long to scan the band, and how to detect whether a malicious adversary is present. It is often not possible to conclusively detect an adversary's presence during...
A novel design of millimeter-wave antennas integrated with a high-impedance surface (HIS) reflector is presented within the particular context of 3D heterogeneous integration on silicon interposer an its specific requirements. Then, the design steps of a 60-GHz folded dipole antenna for short-range communications are detailed. Simulation and measurement results show promising performances in terms...
In order to guarantee data reliability in distributed storage systems, erasure codes are widely used for the desirable storage properties. Nevertheless, the codes have one drawback that overmuch data are needed to repair a failure, resulting in both large bandwidth consuming in the network and high calculation pressure on the replacement node. For repair bandwidth problem, researchers derive the tradeoffs...
Signal Analyzers have been widely used in automatic test equipment (ATE) since the first computer controlled Spectrum analyzer introduced by Hewlett Packard (now Agilent) back in 1978. These signal analyzers are widely used to find signals in the frequency domain whether wanted or unwanted (spurious signals). One of the largest issues with signal analyzers are their ability to create additional signals,...
We developed world first 25Gb/s normal incident germanium silicon avalanche photodiode (Ge/Si APD) in a CMOS commercial foundry. The vertically illuminated Ge/Si APDs have a large 3-dB bandwidth (>18GHz) at a high gain (M=8) which is suitable for 100GBASE-ER4 application.
In present network, bandwidth is valuable resource that limits the enlargement and speed up of communication. Hardware price drops as nearly line speed while long distance transmit price stays stable for years. This trend directs the future network to exchange computation and storage with bandwidth. Service-Oriented Future Internet Architecture proposes to add computation and storage ability to service...
A fully functional hybrid cloud solution requires a placement service to automatically decide whether an application should be deployed on premise, in a public cloud, or across private and public clouds. Such a service must consider application structure and communication patterns, application affinity requirements, which usually result from data protection rules, and deployment costs. In this paper,...
We report the theoretical and experimental study of graphene induced silicon waveguide dispersion changes. The bandwidth of focusing apodized grating may be increased due to the decrease of waveguide dispersion.
Influence of thermal effects induced by nonlinear absorption on four-wave mixing in silicon waveguides is investigated. A conversion bandwidth reduction up to 63% is observed in simulation due to the thermal effects.
Since Internet bandwidth increase, many multimedia has be used in network, this causes the UDP user more than past. In the transmission, Using UDP was fast and immediate but UDP has some shortcoming such as not fairness. It will plunder bandwidth from other network, because it has no rule to control it is transmission rate. In the past, we could overlook this shortcoming, but the UDP user has increased,...
Large bandwidth is indispensable for future high-speed wireless transmission. However, implementation of traditional receiver demands ultra-high-speed ADC to receive large-bandwidth signals, which is challenging for current manufacturing. Motivated to defeat this challenge, we propose STTGR, which is literally extracted from stitching-together receiving. STTGR is a bandwidth extension receiving scheme...
Deeply-etched distributed Bragg reflectors are demonstrated experimentally on silicon with mirror bandwidth that is larger than 170 nm. The reflector is realized by two layers of silicon 1-μm thick separated by a 1.95-μm air gap. Etching depth of 80 μm was obtained with side-wall angle better than 0.05 degree and scalloping peak-to-peak roughness of 15 nm. An optical filter was formed by two reflectors...
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