The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A new cross-layer proportional fair scheduling algorithm suited for delay tolerant traffic in both saturated and non-saturated regimes is presented. Unlike the classical proportional fair scheduling algorithm where the instantaneous rate is normalized by the past average throughput, in the proposed algorithm the normalization is done with respect to the past maximal values. And unlike cumulative distribution...
A novel and simple structure for improving CMRR is introduced. This structure can be added to the circuits like folded cascode amplifier, telescopic amplifier, current buffers, .etc to improve the CMRR of these circuits. This simple and effective circuit uses common mode deviating technique to improve CMRR at least 12dB while preserves CMRR bandwidth which is a novel technique in order to improve...
This work describes the implementation of a 1.2-V programmable gain amplifier (PGA) for high-definition (HD) video digitizers in a 65-nm digital CMOS process. The “pseudo” switched-capacitor (SC) PGA architecture buffers the video signal, without switching, during the active video. The SC circuitry is used for setup of DC operating point during horizontal and vertical blanking periods. Additionally,...
This paper deals with the design of CMOS sampling switch for ultra-low power analog-to-digital converters (ADC) in biomedical applications. General switch design constraints are analyzed, among which the voltage droop due to the subthreshold leakage current constitutes the major error source for low-speed sampling circuits. Based on the analyses, a CMOS sampling switch with leakage-reduction has been...
Three dimension (3D) graphics applications have been widely used in handheld devices which are an inevitable tendency in the future. In this paper, we model a complex 3D graphics SoC hardware by using SystemC and run some testbenches on this platform. For speeding up the simulation time, we adopt Transaction Level Model (TLM) and implement two type of rendering approaches, tile-based and triangle-based,...
Reconfigurable Computing has been making inroads in the front-end digital signal processing systems deployed at radio telescopes around the world. The National Radio Astronomy Observatory (NRAO) at Green Bank has developed a signal processing system expressly for pulsar search and timing observations. These observations are among the most demanding experiments in terms of real-time computational and...
Quality of the service (QoS) plays an important role in the life-cycle of scientific workflows for composing and executing applications. However, the quality of network services has so far rarely been considered in composing and executing scientific workflows. Currently, scientific applications tune the execution quality neglecting network resources, and by selecting only optimal software services...
In this paper we propose a variable-gain transimpedance amplifier suitable for low-power applications. Its noise, bandwidth and input impedance performance are similar to a more conventional regulated-cascode common-gate transimpedance with resistive load, with the same power consumption and gain performance. The proposed amplifier has, however, variable gain, which can be easily changed by setting...
The computing market constantly experiences the introduction of new devices, architectures, and enhancements to existing ones. Due to the number and diversity of processor and accelerator devices available, it is important to be able to objectively compare them based upon their capabilities regarding computation, I/O, power, and memory interfacing. This paper presents an extension to our existing...
In this paper, a novel adaptive mathematical morphological filter is used to remove the noise, such as pulse noise, white noise, narrow bandwidth noise and so forth, in partial discharge signals. The morphological filter consists of vertically invariant morphological opening and closing operators. The shape of structuring element selected in this filter is disk. The filtering scales are varying according...
Because of user mobility, highly dynamic, error-prone wireless channels, the QoS control for mobile Peer-to-Peer (MP2P) streaming media has to face considerable challenges. Given to the advantages of policy management, we develop a policy-based QoS control (PBQC) architecture to provide QoS assurance dynamically and automatically in mobile network environment. And we also propose a MP2P streaming...
Asymmetric stereoscopic coding can save bitrate and maintain the overall visual quality of stereoscopic perception, so it is an alternative for wireless environment in which the bandwidth is limited. In asymmetric stereoscopic coding, the right-view images are down-sampled to half resolution before coding, while the direction of sampling influences the rate-distortion performance of the asymmetric...
We describe the methodology; the design and the implementation of scheduler block of interconnect. The scheduler block is implemented in Verilog using SYNOPSYS tool's DVE and Design_vision. The interconnect is capable of handling 72 bit packets and a total of 32 packets at a time. There are total 8 devices and we have to establish the communication between them. Each device consists of an input block...
This paper presents a RFID tag antenna at 900MHz which has a wide frequency band, meeting that of Chinese standard from 860MHz to 960MHz, and it possesses easy conjugate impedance matching property by adopting an arc-shaped feeding. With a typical antenna impedance of Monza3 (Impinj), the proposed tag of compact size 30×70mm2 has a stable performance through 100MHz frequency bandwidth.
There are two major factors restricting current loop bandwidth, switching frequency and digital delay. Digital delay includes A/D sampling time and PWM duty cycle update. The calculating delay is the major source of delay in the loop. The bandwidth expansion strategy was proposed. Double stator current sampling and double PWM duty cycle update were achieved in a carrier period. This paper chooses...
To improve the adaptability and stability of Dijkstra algorithm for solving routing problem of service composition, a method to solve routing problem of service composition based on an improved ant colony algorithm is proposed. Firstly, based on the traditional ant colony algorithm, the constraints of it are improved. Secondly, a problem solving model for improved ant colony algorithm is established,...
This paper investigates the quantizer-coder design problem for networked control systems (NCSs) with finite communication bandwidth constraints, where sensors and controllers are connected via digital channels carrying a finite number of bits per unit time. The main purpose is to specify upper and lower bounds of data rates of communication channels, above which there exists a coding and control law...
This paper presents an ultra-wideband (UWB) bandpass filter for UWB applications and notch filter for the purpose of reducing interference from the WLAN (802.11a) when it coexist with UWB radio system. The bandpass filter consists of a hexagonal shaped multiple mode resonator (MMR) with interdigital coupling at both sides. The notch filter consists of four identical open ended stubs nearby the MMR...
In the video on demand system, user waiting time and bandwidth allocation are major challenges for the video broadcasting in mobile ad hoc environment. There are many broadcasting schemes which provide efficient bandwidth allocation and optimal user waiting time. In our work we divide channel into two groups (Regular Channel and Sub Channel) and video data into segments and sub-segments. Broadcasting...
Video-on-Demand (VoD) systems are a category of adhoc multimedia services. To provide a quality oriented services to its users, a VoD system requires usage of various resources like bandwidth and disk space. As number of users increase the resources requirements do proportionally increase. Thus these resources are costly and important from QoS perspective. Hence efficient allocation and utilization...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.