Wireless communication devices are currently enjoying increasing popularity and widespread use. The constantly growing number of users, however, results in the shortage of the available spectrum. Various techniques have been proposed to increase the spectrum efficiency of wireless systems to solve the problem. Multiple Input Multiple Output (MIMO) is one solution that employs multiple antennas ...

Studies on the nervous or humoral control of total peripheral resistance are often complicated by concomitant changes in cardiac output. We studied the influence of cardiac output on peripheral resistance in the absence of modulating reflexes. In barodenervated and vagotomized cats, cardiac output was varied by graded inferior caval vein occlusion or by arterial bleeding. Total peripheral resis...

Using the PWM control for switching power supplies the peaks EMI noise appear at the switching frequency and its harmonics. Using randomize or chaotic PWM control techniques in these systems the power spectrum is spread out in all frequencies band spectral emissions, but with a bigger ripple in the output voltage. The proposed nonlinear feedback control method, which induces chaos, is based by ...

In timed event graphs (TEG), stock represents the number of tokens present in the system. It is very similar to work-in-process for manufacturing systems. In general, when choosing a feedback controller, a compromise is sought between fastness of the system and stock size. The classical choice in the max, literature consists in reducing the stock as much as possible without delaying the output....