Linear Frequency Modulation (LFM) waveform becomes widespread in modern pulse compression radar systems in order to improve its target range resolution capability. Conventional LFM based on varying the waveform frequency linearly within the radar pulse width which leads to high Auto Correlation Function (ACF) with limited compression ratio (CR) and side lobe level (SLL). This paper proposed Opt...

Doppler effect plays a vital role and cannot be neglected for high velocity radars. When the velocity between the target and radar is very high compared to the velocity of transmitted waveform, then the received signal suffers Doppler distortion and will not match with the matched filter. Due to this, linear frequency modulation waveform suffers from a considerable signal loss. Use of hyperboli...

sub-pulses, each with 32 μs duration; (b) optimized phase modulation waveform; (c) simulated values of transverse magnetization for the optimized pulse over a range of relative B1 magnitudes (horizontal axis) and frequency offsets (vertical axis); (d) simulated frequency profiles for various relative B1 magnitudes. A slice-selective B1-insensitive composite pulse design for improved excitation ...

We report an improved approach to generate optical triangular-shaped pulse train using quadrupling RF modulation and fiber dispersion-induced power fading. In the proposal, quadrupling RF modulation (via a dual-parallel Mach–Zehnder modulator) is employed to generate four primary optical sidebands (±2nd and ±6th) in spectrum. Then a piece of single mode fiber is connected as the dispersive medi...

This paper reviews and discusses the state of art integrated switched-capacitor inductive power converters provides a perspective on progress towards realization efficient fully DC–DC conversion. A comparative assessment has been presented to review salient features in utilization transistor technology between switched inductor converter-based approaches. First, applications that drive need for...

BACKGROUND Novel pulse photoplethysmographic-derived indices have been proposed as tools to measure autonomic nervous system (ANS) modulation in anesthetized and awake patients, but nowadays their experimental validation is lacking. The authors aimed to investigate the ability of pulse photoplethysmographic amplitude (PPGA), ANS state (ANSS), and ANSS index (ANSSi) to measure changes of ANS mod...

Molecular biological improvement of industrial solventogenic clostridia could be enhanced by a higher efficiency of electrotransformation. In this research, we used a new approach to determine the frequency spontaneously generated by Clostridium acetobutylicum ATCC 824 cells during the application of a square high-voltage pulse. Once the frequency of 100 kHz was determined we transformed clostr...

In this paper, we develop a variable-frequency pulse width modulation (VFPWM) circuit for input control of 6.78-MHz resonant wireless power transfer (WPT) systems. The zero-voltage switching relies on the adjustments both duty cycle and frequency class-E amplifier used in WPT as transmission unit. High-frequency wave integrated circuits exist, but some have insufficiently high or unfavorable re...