The orthogonal half-bridge inverter power supply is developed by two groups SPWM modulation signal of which phase difference has 90°,produced by the TMS320LF2407A controlling waveform memory to control inverter.
This paper study total harmonic power THP and its deciding factors, found that THP only depends on modulated index β and sampling num Rsf in a period of modulating signal, and ,in the envelope of surface THP ~ (β,Rsf), THP is in positive correlation with P and negative with Rsf .
A tent-map chaotic circuit is designed and adopted as the modulating signal source. The discrete-time chaotic signal is incorporated into the Buck converter operating in the continuous-conducted mode, which makes the switching frequency randomly vary with the chaotic signal.
This paper proposes a new feature based on high order cumulants for the identification of digital modulation signals, which can suppress the Gaussian white noise, and identify five digital modulation signals: 2ASK、4ASK、4PSK、2FSK and 4FSK.
Block diagrams of the radiometer input and control units are given, allowing one to double the measurement range by an automatic selection of the modulation signal combinations without a decrease in accuracy.
In this paper, for full response linear modulation signal, a interpolation criterion is proposed.
Computing the cross correlation of the detector output signal against the applied modulation signal generates the chromatogram.
In ordinary communication systems, modulation signal is identical in the beam.
Increasing the amplitude of the modulation signal results in a loss of the frequency selectivity and a saturation of the gain.
Simulated experiments show that the coding of the envelope of a medium-level amplitude-modulated signal is a dynamic process, which includes fine tuning (adaptation) of the threshold of the auditory nerve fiber to the stimulus level.
Owing to these properties, such fibers are capable of reproducing the envelope of a subthreshold modulated signal when weak noise is added to it.
Ways are considered for extending the range of subthreshold signal and noise levels within which the envelope of a modulated signal is reproduced (or the phenomenon of stochastic resonance is observed).
Binaural unmasking of the periodic component in the envelope of an amplitude-modulated signal
The experiments on the formation and compression of a linear frequency-modulated signal reveal a level of 38 dB for the side lobes in a compressed signal.
Based on fractal theory, the note presents a novel method of modulation signals classification that adopts box dimension and information dimension extracted from received signals as features of classification.
Design of interpolation filter for all digital receiver-On the interpolation problem of full response modulation signals
In this paper, demodulation performance of first-order cyclic statistics and second-order cyclic statistics for amplitude modulation signals is introduced.
By theoretical research, it is proved that cyclic mean does not possess demodulation performance for amplitude modulation signals, but cyclic autocorrelation function can extract frequency components from amplitude modulation signals.
Accurate lineshape analysis of frequency modulation signals has been employed to extract the desired information, and is corroborated by cavity enhanced measurements.