Composite Amplitude-Shift Keying for Effective LED-Camera VLC

2020 ◽  
Vol 19 (3) ◽  
pp. 528-539
Author(s):  
Yanbing Yang ◽  
Jun Luo
Keyword(s):  
Amplitude Shift Keying ◽  
Shift Keying

An internally-controlled memristor-based amplitude shift keying modulator

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Chiemeka Loveth Maxwell ◽  
Dongsheng Yu ◽  
Yang Leng
Keyword(s):  
Control Signal ◽  
Current Conveyors ◽  
Pass Filter ◽  
Content Type ◽  
Amplitude Shift Keying ◽  
Additional Control ◽  
Binary Signal ◽  
Shift Keying ◽  
Control Circuits ◽  
Memristor Emulator

Purpose The purpose of this paper is to design and construct an amplitude shift keying (ASK) modulator, which, using the digital binary modulating signal, controls a floating memristor emulator (MR) internally without the need for additional control circuits to achieve the ASK modulated wave. Design/methodology/approach A binary digital unipolar signal to be modulated is converted by a pre-processor circuit into a suitable bipolar modulating direct current (DC) signal for the control of the MR state, using current conveyors the carrier signal’s amplitude is varied with the change in the memristance of the floating MR. A high pass filter is then used to remove the DC control signal (modulating signal) leaving only the modulated carrier signal. Findings The results from the experiment and simulation are in agreement showed that the MR can be switched between two states and that a change in the carrier signals amplitude can be achieved by using an MR. Thus, showing that the circuit behavior is in line with the proposed theory and validating the said theory. Originality/value In this paper, the binary signal to be modulated is modified into a suitable control signal for the MR, thus the MR relies on the internal operation of the modulator circuit for the control of its memristance. An ASK modulation can then be achieved using a floating memristor without the need for additional circuits or signals to control its memristance.

Multilevel amplitude shift keying in dispersion uncompensated optical systems

2006 ◽  
Vol 153 (3) ◽  
pp. 101-108 ◽  
Author(s):  
N. Avlonitis ◽  
E.M. Yeatman ◽  
M. Jones ◽  
A. Hadjifotiou
Keyword(s):  
Optical Systems ◽  
Amplitude Shift Keying ◽  
Shift Keying

scholarly journals Demonstration of an All-Optical 2-to-4 Level Encoder Based on an Optical Parametric Amplifier

2009 ◽  
Vol 2009 ◽  
pp. 1-4 ◽  
Author(s):  
Yu Liang ◽  
P. C. Chui ◽  
Kenneth Kin-Yip Wong
Keyword(s):  
Data Streams ◽  
Parametric Amplifier ◽  
Optical Parametric Amplifier ◽  
Amplitude Shift Keying ◽  
Novel Technique ◽  
Optical Parametric ◽  
All Optical ◽  
Fiber Optical ◽  
Shift Keying ◽  
Fiber Optical Parametric Amplifier

We demonstrated a novel technique for all-optical 2-to-4 level amplitude-shift keying (ASK) coding based on a fiber optical parametric amplifier. A 20-Gb/s signal is realized by multiplexing two 10-Gb/s data streams.

Improvement of Amplitude-Shift-Keying Signal Quality by Employing an Effective Spectrum Equalization Method in a Combined FSK/ASK Modulation Scheme

2005 ◽  
Vol 22 (8) ◽  
pp. 1948-1950 ◽  
Author(s):  
Xin Xiang-Jun ◽  
P. S André ◽  
A. L. J Teixeira ◽  
Yu Chong-Xiu ◽  
Ana Ferreira ◽  
...  
Keyword(s):  
Modulation Scheme ◽  
Signal Quality ◽  
Amplitude Shift Keying ◽  
Shift Keying ◽  
Equalization Method
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