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Output voltage of renewable energy resources, such as fuel and solar cells, varies widely with load and environmental condition, so a DC-DC converter should be suitable for wide input-voltage range application and be with low input ripple current. An integrated boost three-phase half-bridge converter is proposed. The boost and three-phase half-bridge converters are integrated to reduce number of switches...
Single-stage buck-boost gird-connected inverter is widely used in distributed generation systems because of low cost and high efficiency. However, shoot-through problem exists, so reliability of the system is reduced. In addition, output voltage of renewable energy resources varies widely with load and environmental condition, so voltage stress of switches is high in wide input-voltage range application...
Threshold-based caching has been widely researched in the literature of content-centric network. Most of the existing approaches only consider the user experience performance, i.e. the average request delay, in the cache networks. In this paper, we propose to consider the system cost metric of cache utilization ratio, and develop a kind of threshold-based caching algorithm that aims to reduce the...
The underactuated 2-dimensional translational Oscillator with rotational actuator (2DTORA) system consisting of an rotational proof-mass and two unactuated translational carts is an extension version of the TORA system which is a well-known benchmark for nonlinear control design. In this paper, dynamics of 2DTORA system is normalized and written in general affine form. And we apply fuzzy Lyapunov...
Cellular systems operate on ISM band with the co-existence of wide-deployed WLAN is a promising solution to offload the crowded cellular band, where cellular device acting as virtual a WLAN station contends for WLAN channel resource via applying the same IEEE 802.11 Distributed Coordination Function(DCF) as WLAN rivals is a straightforward way. However, the conventional mechanism cannot fully utilize...
In this letter, we introduce a coordinated multi-cell transmit diversity (TxD) technique which improves the existing space frequency block coding based single-cell TxD schemes by combining them with inter-cell cyclic delay. With the proposed symbol-to-subcarrier mapping rule, this novel method achieves better diversity gain over the existing multi-cell and single-cell counterparts. This design is...
Most bats emit echolocation signal with both constant frequency (CF) and linear frequency modulated (LFM) component in a single pulse. The CF part was used to get crude velocity information, and then the Doppler frequency shift can be used to compensate the LFM signal processing unit which was used to get fine information of the targets. In this article, a compensated fractional Fourier transform...
In this paper, a novel interference coordination scheme based softer frequency reuse (SerFR) to mitigate inter-cell interference in Orthogonal Frequency Division Multiple Access (OFDMA) cellular systems is presented. In OFDMA systems, inter-cell interference is the most important interference source. Inter-cell interference coordination is considered to improve coverage and increase date rate at cell...
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