Frequency demodulation or detection can be obtained directly by using the PLL circuit. When the centre frequency of the PLL is selected or designed at the FM carrier frequency, the filtered or output voltage in the circuit shown in figure, is obviously the desired demodulated voltage, that varies...
A frequency demodulation using PLL devices. 根据本发明,为了使一个本地振荡器(11)的其控制信号(Vb)的函数频率变化线性化,通过一个电子模块(20)形成一个可变电容(Cv),该电子模块(20)提供一个其变化是所述控制电压(Vb)函数的电容的等效值,并具有为补偿作为电容(Cv)的值的函数的所述振荡器频率线性偏差而建立...
The frequency translation can be defined as; it is one kind of method for transmitting a signal from one fraction of the frequency axis to another fraction of the axis. This is frequently done within thewireless communicationssystem to transmit a passband signal toward baseband previous todemodulat...
where the frequency demodulation was obtained directly from the PLL circuit by taking the center frequency of the PLL todesign the FM carrier frequency. Th... MJS Abdaljabar,H Ali 被引量: 0发表: 0年 加载更多研究点推荐 FREQUENCY DEMODULATION CIRCUIT ...
The demodulation method directly detects these modulation frequencies, so it is used for recovering the data from the modulated carrier signal. The Bandwidth of Frequency Modulation Signal Bandwidth is one of the main elements of FM signal. In FM signal, the sidebands will extend either side which...
demodulation can be performed by a phase locked loop (PLL) which locks a VCO within the PLL to the received FM signal. Once the PLL locks to the FM signal, the control voltage to the VCO comprises the estimate of the modulating signal. FM detection using FM discriminator and PLL are ...
The paper introduces a system using PLL frequency modulation and demodulation technique, and using infrared as the carrier to realize wireless communicatio... J Wang,S Feng - 《Applied Mechanics & Materials》 被引量: 0发表: 2014年 An ultraviolet laser communication system using frequency-shift keyi...
Improved instantaneous frequency estimation using an adaptive short-time Fourier transform 来自 国家科技图书文献中心 喜欢 0 阅读量: 124 作者:HK Kwok,DL Jones 摘要: Instantaneous frequency estimation (IFE) arises in a variety of important applications, including FM demodulation. We present here a new...
detector together with the other elements of the loop constitutes a PLL-FM/PM demodulator, also referred to as PLL frequency demodulator. If the phase detector is used in an FM quadrature detector for FM demodulation, its signal-to-noise ratio may be improved by means of an improved frequency...
Using the dynamical systems approach we show that the suggested device has a broad parameter region in which the synchronization and demodulation take place... A Volkovskii,I Langmore - American Institute of Physics 被引量: 3发表: 2003年 加载更多来源...