Aleksandr Timoshenko

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This paper presents an analog-controlled feedback for predistortion of switched mode GaN power amplifier with PAPR reduction technique. The nonlinearity control scenarios and algorithms are described. After the statistic simulation for different feedback delay the frequency dependent feedback loop was analyzed for implementing the model which enables to(More)
This paper presents a method of calculating the minimal required transmission period for control messages and power margin for MANET with constrained resources, namely for communication and control systems on-planet robotic systems. For a system with ten robotic devices, with velocities of 10 cm/s, the sufficient power margin for worst case scenario will be(More)
Status of microcirculation, bioelectrical activity of myocardium and tolerability to physical loads were studied in 120 patients with myocardial infarction with capillary and tropic insufficiency, divided into four groups, over time, before and after course exposure to physical factors such as the "Venoruton" ointment phonophoresis and electromagnetic(More)
In the modern LTE systems the Zadoff-Chu sequences are being used to transmit the synchronization signal. The complex sequence is transmitted both in the in-phase (I) and quadrature (Q) channels, the precision of which depends on the technological mismatch of the devices' parameters. The used sequences set a series of limitations on the existed(More)
The article presents the results of the design of GaN phase shifter for MIMO-based antennas. The optimization and simulation for each operating frequency 0.1–31.5 GHz was performed along with simulation of effect of capacitance mismatch on phase shifter parameters. The phase shifter is designed as a switchable high-pass filter that provides a(More)