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This paper proposes a low power and efficient QRS processor for real-time and continuous mobile ECG monitoring. The QRS detector contains the wavelet transform (WT), the modulus maxima pair identification (MMPI), and the R position modification (RPM). In order to reduce power consumption, we choose the Haar function as the mother wavelet of WT. It is implemented by an optimized FIR filter structure...
In this paper, we critically analyze the optimization strategy of distribution network based on adapting adjustment of transformer's taps and review a large amount of relevant literature in order to explore the state-of-the-art research progresses in both academia and industry. By the analysis and literature review, a complete research proposal pertaining to the optimization strategy of distribution...
Recently, Wireless Body Area Network (WBAN) has promise to revolutionize human daily life, which is built to serve a variety of healthcare and entertainment applications for human beings. The need for multiple sensors and constant monitoring lead these systems to be energy hungry and expensive with short operating lifetimes. In this paper, we study the popular power management technique Dynamic Voltage...
Small-cell networks play an important role in next generation mobile networks. Multiple antennas can be employed at the small-cell base stations (SBS) to further improve the spectrum-efficiency. However, the increased number of antenna elements induces more energy consumption, i.e., there exists a tradeoff between the energy-efficiency and the spectrum-efficiency. In this paper, the network performance...
A conceptual solar race car, especially its powertrain is designed according to the World Solar Challenge (WSC) rules. Then its speed control strategy is studied out. Finally, the speed control stratege of this solar car is simulated in Matlab. Several comparing results show that, using the parameters matching results and speed control strategy, it cannot only finish the race under various conditions,...
One of the challenges for implementing 60GHz based wireless networks is the large amount of power consumption due to the large number of antenna elements. Decreasing the beamwidth of each link, each link obtains higher spatial reuse gain, however, the energy consumption is increasing dramatically due to the increased number of antenna elements. In order to tradeoff the energy consumption and the spatial...
With increased radio frequency (RF) chains, base station (BS) with multiple antennas consumes more circuit power. Turning off RF chains will help to save energy. However, in turn, it needs more sophisticated user scheduling. Therefore, an energy-efficient scheduling scheme is proposed with which users and RF chains are jointly selected at each frame. Here, Lyapunov drift-plus-penalty ratio is used...
An LC injection locked frequency divider (ILFD) in CMOS technology is designed. By adopting the direct injection of signal into the resonation tank, the locking range of the ILFD is improved. For the purpose of reducing the power consumption, the complimentary topology is adopted in this work and also the voltage swing of the ILFD is optimized. The simulation results indicate that the ILFD has a wide...
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