The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A regulated linear dual-tuning differential ring oscillator has been designed and fabricated in UMC 0.13 µm CMOS process for ultra wide band (UWB) applications. The integrated voltage regulator has a robust performance with high power supply rejection ratio to improve phase noise performance at the presence of power supply ripple. The proposed dual-tuning technique enables a wide tuning range covering...
In order to improve the quality and efficiency of ground-to-air data communication, the improved two dimension markov model is put forward. Then the best Rth improved arithmetic, the best Fth improved arithmetic and the mixed best threshold arithmetic which introduces two mechanism are discussed, and the method is given. The new method provides theory idea for dispeling network performance paremeter...
The disadvantages of the current algorithms for the underwater acoustic Ad hoc networks were analyzed. After that, an energy and time efficiency based topology control algorithm was proposed. The networks topology is controlled by a single-hop transmission cost index defined in the algorithm. The index describes the energy consumption, the communication delay and the signal attenuation of the networks...
In this paper, two Doppler radars are used to monitor the pulse movements at the heart and the calf in order to measure the pulse wave velocity (PWV) wirelessly. Both simulation and experiment have been performed to demonstrate the feasibility of the proposed noncontact PWV monitoring. A three-stage calibration procedure, including DC offset calibration, circuit delay calibration and antenna radiation...
The relative merits of ALOHA and the multiple access with collision avoidance (MACA) for the underwater acoustic Ad hoc networks were analyzed. After that, a new media access control (MAC) protocol was proposed which had the advantages of the above two MAC protocols. When the networks load is not heavy, the new protocol uses the channel access method in ALOHA. So the spending of the handshake time...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.