Pulse Code Modulation (PCM) is an extension of Pulse amplitude Modulation (PAM) where in each analogue sample value is quantized into a discrete value for representation as a digital code word.The methods of se
Pulse Code Demodulation will be doing the samemodulation processin reverse. Demodulation starts with the decoding process, during transmission the PCM signal will be affected by noise interference. So, before the PCM signal sends to the PCM demodulator, we have to recover the signal to the origina...
being greater than said information signals, and means for deriving compressed signals connected to the output of said limiter means, said last-mentioned means comprising filter means for selecting the frequency band of said information signals and rejecting the frequency of said subcarrier oscillation....
And a method generating a second but inverted play-back signal permitting use of two identical pulse width modulation transition descriminators-detectors.doi:US4271438 AWilliam D. CornellUSUS4271438 * 1979年7月5日 1981年6月2日 Cornell; William D. Recovery and demodulation of a pulse width ...
The multiplier circuit 11 multiplies the output of a delay circuit 12 with the power of the linear coupling coefficient alpha onto the multiplier M and the result is inputted to a power circuit 13.ONUKI KATSUMINISHITANI TAKAO
Modulation Method: M-ary system data visible light communication system using the method of zero type modulation MRZOPAM form of pulse amplitude; the zero pulse modulation method is by changing the system of data M-ary Gray code corresponding to the margin achieved; demodulation method: the zero...
Pulse modulation and - demodulation in a multi-band - uwb - communication systemIn a wireless communications system, such as a multiband Ultra Wideband communications system, data is transmitted by means of the phases of pulses in multiple frequency bands. A signal is transmitted with a ...
A pulse modulator is coupled to an output of the PFC converter to receive a signal representative of voltage ripple at the output of the PFC converter, and is configured to modulate a pulse signal based on an amplitude of the voltage ripple. A pulse demodulator is coupled to the pulse ...
Adaptive differential pulse code modulation/demodulation system and methodChuFeng Lien
A signal modulation and demodulation method in visible light communication based on combined modified difference pulse code modulation (MDPCM)-MRZOPAM relates to a signal modulation and demodulation method for the visible light communication. The method aims at increasing visible light communication system...