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Reusing the frequency resources has long been a desirable practice in most licensed wireless networks. In future, frequency reuse will be enabled by advanced technologies like device-to-device (D2D) communication which will allow eNB-free data exchange between end devices. However, the first challenge for devices to establish D2D links will be to ”discover” each other in a distributed manner. Even...
In this paper, we employ a macroscopic traffic model and RBF neural network to address highway density control problem. This control system is a nonlinear feedback closed-loop system. Firstly, a popular traffic model called the LWR (Lighthill-Whitham-Richards) model is formulated. Secondly, a direct RBF neural network control for discrete-time nonlinear systems is introduced. The control algorithm...
In order to reduce the traffic load in cellular network and improve the data rates for users located in an indoor environment the Femtocells are used to solve the poor indoor coverage problem. It represents a cost-effective solution compared to other solutions such as Picocells and distributed antenna systems. However, if the signal-to-noise ratio is high then UEs can receive good throughput. For...
The actual meshing state of Planetary Roller Screw will change, then the pre-setting meshing state could not be ensured and backlash or pre-tightening will appear, when the sizes of the tooth figure vary with the manufacture error. Therefore, a vector method is proposed to quantify meshing state of planetary roller screw, in order to precisely describe the meshing state. Using the relative position...
Penetration of multimedia communications with mobile Wi-Fi and tethering requires wireless LANs (WLANs) to guarantee a specific bandwidth in densely deployed WLANs. IEEE802.11e (HCCA) with 802.11aa could use inefficiently radio frequency as well as fail to provide each WLAN with enough CFP period in which sending opportunity of a terminal is guaranteed. To guarantee a specific bandwidth even in densely...
Bioelectrical impedance technology is considered to be a noninvasive method of measuring heart function. Feature points extraction of impedance cardiography (ICG) signal is vital to cardiovascular disease diagnosis, and feature points extraction has curative value after operation. In this paper, the new algorithm combined with the wavelet technology to extract feature points accurately. Feature points...
Water supply system has characteristics of non-linear, time-varying parameter, large time delay, so its mathematical model changes time by time. Water supply system widely use PID controller to keep constant pressure and PID controller need accurate mathematical model. The system that use PID controller is along with large overshoot, more adjusting time. Fuzzy controller don't need the accurate mathematical...
In case of the decision of the task of design of automated control systems for crucial objects, a minimum possible level of risks at uncontrollable interference in the processes of functioning of these systems, and also minimization of negative consequences from a similar interference in the course of its operation are required. In connection with this, on the basis of the system theory of conflict...
We consider the scheduling problem for Aggregated ConvergeCast in wireless sensor networks with a physical interference model. Previous work consists of either heuristics without performance guarantees, or approximation algorithms which do not perform well in practice. We propose here a first scalable mathematical SINR (Signal to Interference plus Noise Ratio) model that outputs an optimal Aggregated...
Recently, the development of wireless body area network (WBAN) is accelerated due to rapid development of wireless technology. In the WBAN environment, many WBANs coexist where communication ranges overlap with each other, resulting in the possibility of interference. Since many variety of applications exist in the WBAN environment, each prospective user may have different quality of service (QoS)...
The existing localization methods for the satellite communication interference source based on satellites are too complex and costly to be used in practical applications. A new localization method based on two satellites for the interference source is proposed in this paper. By combining two localization parameters named time difference of arrival (TDOA) between two satellites and the direction of...
This work presents a path following controller for single Unmanned Surface Vessels (USV) in formation control. Firstly, the USV mathematical model under unknown dynamic sea conditions will be analyzed. And then an adaptive robust controller is designed based on RBF neural network. Finally, the controller stability and robustness with unmodeled dynamics and unknown model parameters perturbation in...
In this paper, a kind of interference on chirp pluses in spaceborne SAR and the corresponding suppression method are introduced. This interference is a kind of multi-component linear frequency modulated (LFM) signal which is difficult to be suppression by classical elimination methods. According to the generation mechanism of interference, the mathematical model is established firstly. Moreover, the...
The existing half-duplex relay-based device-to-device (D2D) communication equips with single antenna infrastructure and receives and transmits signals in two equivalent slots which lead to poor performance in term of rate achievement. To solve this problem, we propose a new relay-based D2D scheme with two-antenna infrastructure and bring in slot splitting factor to divide one frame into double unequal...
Energy efficiency has been a growing requirement in the latest development of wireless communication systems, and it has led to research on off-grid relay nodes with simultaneous wireless information and power transfer (SWIPT) capabilities. Two SWIPT protocols have been developed in the past, named power splitting and time switching. Both protocols have been theoretically proven to improve energy-constrained...
This paper focuses on power amplifiers linearization based on adaptive predistortion and their susceptibility to IEMI. The method gives very good results in simulation and on a test bench. The idea here is to illuminate the power amplifier with an intentional electromagnetic interference while its model coefficients are being processed. This leads to an erroneous model inference and therefore a poor...
The present work is devoted to research the influence of impulse noise on data transmission in computer networks employing Power Line Communication (PLC) technology. Electrical interference in such networks is regarded as a kind of solar interference. In this interpretation, the source of interference (an analogue of the Sun) is on the same axis with the Sender-Receiver communication line. This approach...
This paper presents pilot symbol aided channel estimation in Filter Bank Multicarrier (FBMC). FBMC has been employed widespread in communication applications because of its good spectral behaviors. Unlike Orthogonal Frequency Division Multiplexing, FBMC structure avoids imaginary interference. So that auxiliary symbols are employed and decrease peak to power ratio and improve achievable capacity....
Cascade control is one of the most successful methods for improving single loop control performance. This control can stabilize the system, minimalize both of oscillation and integral error of interference in manipulation variables. Cascade control structure consists of two controllers where loop feedback in the loop feedback. This research takes a case on original shell-and-tube heat exchanger and...
While the Global Positioning System (GPS) tends to be not useful anymore in terms of precise localization once one gets into a building, Low Energy beacons might come in handy instead. Navigating free of signal reception problems throughout a building when one has never visited that place before is a challenge tackled with indoors localization. Using Bluetooth Low Energy1 (BLE) beacons (either iBeacon...
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