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Femtocell is a small sized indoor basestation to increase the coverage and capacity. Femtocell is connected through broadband backhual to the IEEE1588 to synchronize and manage the network. Due to limited/poor connectivity femtocell suffers by frequency misallignment and clock differencs. To overcome this problem MS-Assisted Receiver-Receiver Time Synchronization Strategy has been proposed. But this...
Sensors are usually used in real-time system. Since time constraint is an important requirement in real-time system, it is necessary to formalize the protocols in WSN by emphasizing on consistence of temporal and spatial. STeC is a language looking like an extension of process systems CSP and CCS including actions and communication. But it stresses the spatial-temporal consistence of real-time systems...
This paper focuses on the problem of global synchronization for impulsive coupled dynamical networks via pinning control. Controlling impulsive synchronization of the network by changing the differences between some chosen nodes and the reference signal step by step is the main idea discussed in this paper, regardless of whether there is a synchronized or desynchronized impulses for the dynamical...
Lorenz system generates the chaotic signal with marked features in both time and frequency domains. Such disadvantages are not benefit for its applications in chaotic masking secure communication. To overcome such defects, this paper introduces a frequency domain truncation method for Lorenz-based chaotic masking secure communication. The main work focuses on the parameter test of this frequency truncation...
We propose a frequency synchronization method for hybrid bi-static synthetic aperture radar (SAR), which denotes a SAR system with a spaceborne illuminator and an airborne receiver. Due to the high altitude difference, the method based on extracting the direct path signal is employed. The mathematical model to compute the frequency offset between the two sides' oscillators is given. Among the model,...
Traditional infrared detection system has small viewing field and low scanning speed, a new all-directional IRST system with high scanning speed is designed, which quickly images the whole spherical airspace on the infrared sensors by the reflector circumrotating in pitching and azimuth with high speed. The real-time processing system for high speed input images is constructed based on the processor...
In this paper, we propose a robust STBC transmission scheme to combat the timing synchronization errors over frequency-selective multiple-access channels. First, the equivalent channel model in the presence of timing synchronization errors is derived and we find that the synchronization errors result in an equivalent channel model with larger number of correlated channel taps. Based on this correlated...
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