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In this paper we furnish a novel approach of design automation and power optimization of CMOS analog integrated circuits. This method offers an effective amalgamation between the principles of orthogonal-convex optimization and the all-inversion region MOS transistor model. The design equations, emerging from various device and circuit specifications can be modeled as the constraints of an orthogonal-convex...
In a Dynamic Spectrum Access (DSA) environment, how can cognitive radios (CRs) initially rendezvous their opportunistic channels to setup a network without causing interference to primary users (SUs) or other secondary users (SUs) is still an open problem in literature. In this paper, this problem is solved by a proposed network-wide clock synchronization scheme, which is implemented along with the...
A lossless data-hiding scheme for the H.264/AVC compressed bit-stream is presented in this paper. Traditional data-hiding schemes of compressed videos would incur a great deal of permanent degradation of signal quality distortion in the marked bit-stream. In the paper, the proposed video data-hiding scheme is able to restore exactly the originally encoded video signal at the decoder while extracting...
The availability of affordable cameras with additional depth sensor boosted the advances in the field of Simultaneous Localization and Mapping (SLAM). This area of research addresses creating a 3D representation of unknown environment by fusing sensor information. Whereas a coarse representation suffices for navigational purposes, the resulting 3D models are not accurate enough to allow rendering...
This paper identify the considerations of function and implementation of a secure model communications trough mobiles (cell phones) using Voip. Allowing to the users advance in the maintenance the security of their data, and the exchange of information and their privacy.
Orthogonal Frequency Division Multiplexing (OFDM) is a common used technology for communication systems nowadays. Besides the synchronization of OFDM based receivers, the estimation of the noise variance as well as the corresponding signal-to-noise ratio (SNR) is a challenging issue, especially under dispersive fading channel conditions. In this paper the principle of blind OFDM synchronization via...
The experiment was performed using the Ginga-NCL Virtual STB version 0.12.4, a implementation of Ginga-NCL designed with the objective of offering in virtualized environment, characteristics similar to set-top boxes commercial. Tests were conducted on a personal computer running the Ginga-NCL Virtual STB, with the following hardware specifications: Intel Core i5 2.27GHz processor, 4GB RAM, 500GB HD...
This paper proposes the use of Particle Swarm Optimization (PSO) to work with an Enhanced-ICP to effectively filter out outliers and avoid false matching points during the map building of an unknown environment, where PSO is used to solve the local optima problem to obtain better transformation results for two data sets with excessive difference in initial position and direction. Then, we use part...
This article is about a state of charge (SOC) and the state of health (SOH) estimator designed for a battery management system (BMS). It was applied on a 48V lead-acid battery pack of an electrical scooter. A software Kalman based SOC sensor has been developed using a PIC microcontroller, by using a relatively simple battery model, combined with Kalman filter algorithm. The SOC has been estimated...
This paper presents a hardware/software co-design method for a hybrid object tracking algorithm incorporating particle filter (PF) and particle swarm optimization (PSO) based on System On Program Chip (SOPC) technique. Considering both the execution speed and design flexibility, we use a embedded processor to calculate weight for each particle and a hybrid accelerator implemented by hardware to update...
Constant hardware improvements of handheld devices (e.g. tablets and smartphones) and the fact that they are already present in almost every home, makes them a target platform for becoming the second screen of a digital TV (DTV) device. This paper presents one solution of remote control protocol suitable for resolving problems regarding content sharing from DTV set-top box to second screen devices...
There are demanding display quality factors to meet the industrial requirements for accurate color reproduction such as the chrominance accuracy of primary colors, uniform gray color temperature, display gamma for primary and gray channels and so forth. However, due to the optical limitation of display panels, the correlated color temperature fluctuates up to 3000 Kelvin in typical calibrated flat...
For computer systems, it is essential the establishment of policies for reducing consumption and avoiding the waste of energy. However, traditional approaches for retrieving energy consumption information are not suitable for creating effective policies. In this paper, we present a power estimation model that provides detailed information about energy consumption of processors and devices, by applying...
In this paper, we propose a joint source-channel coding (JSCC) scheme for wireless image transmission over IEEE 802.11ac system. JSCC is a coding technique where both source and channel characteristics are considered. In a multiple-input multiple-output (MIMO) system based on an eigenbeam-space division multiplexing (E-SDM) technique, signal-to-noise ratio (SNR) of each spatial stream varies because...
This paper evaluates the performance of narrowband Power Line Communication (PLC) orthogonal frequency division multiplexing (OFDM) transceivers which comply with the ITU-T G.9955 recommendation. The performance assessment is based on realistic conditions namely when considering measured PLC channels at low frequencies and in presence of measured stationary and impulsive noise. Channel estimation...
In this paper a solution is described which facilitates the integration of TR-069 functionality to Android applications. Solution for this problem is given as an Android service with a binding interface, which can be incorporated in any Android application.
A novel low-complexity visual saliency detection algorithm for detecting salient regions in images is proposed. The algorithm derives salient regions based on in-focus regions and image centre sensitivity. The performance of the algorithm in predicting human eye fixations is validated against ten state-of-the-art algorithms using a public image dataset. The results demonstrate that the proposed algorithm...
This work presents the implementation of an experimental platform for monitoring the power consumption of mobile devices, such as smartphones, notebooks and netbooks. In this platform, a robust electrical circuit is connected to a data aquisition module for power measurements via a virtual instrumentation implemented in the LabVIEW software. The computer system state was measured by means of operating...
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