Frequency and phase shift modulation
Photonic crystal cavity-based intensity modulation for integrated optical frequency comb generation
... controllable phase difference causes modulation of the carrier lights ...constant phase shift can be ...the modulation depth and the voltage of the DC bias will determine a constant ...
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OFDM in Free Space Optical Communication System
... using phase shift keying (PSK) or quadrature amplitude modulation (QAM) and are then carried on a high frequency ...multicarrier modulation where its carrier spacing is carefully ...
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Linear Beamforming Assisted Receiver for Binary Phase Shift Keying Modulation Systems
... The system consists of M users, and each user transmits a BPSK signal on the same carrier frequency ω = 2πf . The receiver is equipped with a linear antenna array consisting of L uniformly spaced elements. Assume ...
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Higher Data Transmission by Using Barcode Modulation by Dpsk-Ofdm
... barcode modulation. In this advanced technique, orthogonal frequency- division multiplexing (OFDM) modulation is used together with differential phase shift keying (DPSK) over adjacent ...
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Interactive Kalman Filtering for Differential and Gaussian Frequency Shift Keying Modulation with Application in Bluetooth
... current phase is a function of the previous phase and the current input, making it possible to do the prediction task of the next ...in phase is continuous, and the changes do not occur abruptly, ...
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Joint Multilevel Turbo Equalization and Continuous Phase Frequency Shift Keying
... coded modulation scheme, called multilevel turbo coded-continuous phase frequency shift keying (MLTC- CPFSK), is designed to improve the overall bit error rate (BER) and bandwidth ...
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An Active PWM Technique For A Transformer less H-Bridge Cascaded STATCOM With Wye Configuration
... low-frequency modulation are ...the phase-shift angle for dc voltage balancing control is proposed in [42] and [43], through which the desirable effect can be easily achieved, whereas it is ...
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Comparative Study of Digital Modulation Techniques Using MATLAB
... digital modulation provides more information capacity, compatibility with digital data services, higher data security, better quality communications, and quicker system ...digital modulation techniques used ...
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Comparative Analysis of OOK, BPSK, DPSK and PPM Modulation Techniques for Intersatellite Free Space Optical Communication
... radio frequency (RF) communication over the last two ...optical modulation techniques such as On-Off Keying (OOK), Binary Phase-Shift Keying (BPSK), Differential Phase-Shift ...
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Frequency and phase modulation performance of an injection locked CW magnetron
... the phase and frequency of its injection ...output frequency the magnetron would have without injection is kept close to the injection frequency by utilization of the magnetron’s pushing ...
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A calibration method for broad-bandwidth cavity enhanced absorption spectroscopy performed with supercontinuum radiation
... reference phase an- gle could be monitored without the mirror removal by plac- ing a beam splitter between the AOTF and the cavity to re- flect part of the laser beam onto a reference ...the phase angle is ...
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SECURITY IN COGNITIVE RADIO NETWORK
... (Quadrature Phase Shift Keying is a DSBCS modulation scheme with digital information for the ...carrier frequency).The quantity of radio frequency spectrum required to transmit QPSK ...
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Efficient and Robust Detection of GFSK Signals under Dispersive Channel, Modulation Index, and Carrier Frequency Offset Conditions
... Gaussian frequency shift keying is the modulation scheme specified for ...carrier frequency, and modulation index ...performing phase propagation of intermediate results over ...
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Performance Comparison of Digital Modulation Techniques used in Wireless Communication System
... digital modulation provides more information capacity, compatibility with digital data services, higher data security, better quality communications, and quicker system ...digital modulation techniques used ...
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Direct antenna modulation for high-order phase shift keying
... directly phase modulating a radio frequency carrier is discussed, designed, and measured as both an antenna and a ...reconfigurable frequency selective surfaces are suggested as phase ...a ...
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Evaluation of SNR for AWGN, Rayleigh and Rician Fading Channels Under DPSK Modulation Scheme with Constant BER
... Amplitude Shift Keying (ASK), Frequency Shift Keying (FSK), Phase Shift Keying (PSK), Differential Phase shift Keying (DPSK) and Quadrature Amplitude Modulation ...
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Simulation of Digital Modulation Techniques Using MATLAB
... Digital modulation the message signal is in the digital form and the carrier wave is in sinusoidal ...Amplitude, Frequency or Phase of carrier varies according to message (Baseband) ...digital ...
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Simulation of WiMAX System Based on OFDM Model with Difference Adaptive Modulation Techniques
... carrier modulation for data transmission ...wide frequency selectivity of fading channels into multiple flat fading channels ...of modulation technique which is a mixture of ASK and PSK with a new ...
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DPSK OFDM System for Reliable Data Transmission using QRcode System in Mobile Devices
... data modulation in 2-D barcodes is confirmed, and its attitude is evaluated in allegory to contrasting standard methods of barcode ...orthogonal frequency-division multiplexing (OFDM) modulation is ...
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A Study on FPGA Based Digital Modulators
... carrier frequency is 31,250 ...binary frequency shift keying (BFSK) and binary phase shift keying (BPSK) modulation techniques in FPGA ...the modulation techniques in low ...
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