Xueqing Huang

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Coordinated transmission in multicell coordination networks has attracted much attentions in recent years. In the paper, we investigate one open problem in the above area, which is concerned with how to solve the closed-form optimal power allocation scheme of coordinated transmission in downlink orthogonal frequencydivision multiplexing (OFDM) systems with(More)
Green energy powered cognitive radio (CR) network is capable of liberating the wireless access networks from spectral and energy constraints. The limitation of the spectrum is alleviated by exploiting cognitive networking in which wireless nodes sense and utilize the spare spectrum for data communications, while dependence on the traditional unsustainable(More)
The growth in the demand of energy, and its consequent contribution to the greenhouse effect, gives rise to new challenges in the design of future wireless networks. Keeping in mind these requirements, in this article we study the power allocation problem in the downlink of an orthogonal frequency division multiple access (OFDMA) system, where two (or more)(More)
In this paper, we present a new power allocation scheme for a decode-and-forward (DF) relaying-enhanced cooperative wireless system. While both source and relay nodes may have limited traditional brown power supply or fixed green energy storage, the hybrid source node can also draw power from the surrounding radio frequency (RF) signals. In particular, we(More)
Carrier aggregation (CA) technique has been adopted by 3GPP LTE-Advanced due to its ability of enhancing the spectrum efficiency and peak data rates through aggregating multiple component carriers (CCs). Two main factors make power control optimization very essential for CA-MIMO radio link: the different channel characteristics in multiple CCs, and multiple(More)
Most timing analyzers rely upon a linear approximate interconnect model, typically an RC tree, to estimate efficiently the propagation delays for digital MOS integrated circuits. RC tree methods are adequate to analyze a large class of MOS circuits, but are not sufficient in general for high speed, dynamic and precharge MOS circuits. In addition bipolar(More)
Through simultaneous energy and information transfer, radio frequency (RF) energy harvesting (EH) reduces the energy consumption of the wireless networks. It also provides a new approach for the wireless devices to share each other's energy storage, without relying on the power grid or traffic offloading. In this paper, we study RF energy harvesting enabled(More)
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