Results 201 to 210 of about 18,013 (228)

Quadrature Demodulation of Binary Phase Shift Keyed Signals

IETE Journal of Education, 1988
A quadrature demodulation scheme for Binary Phase Shift Keyed (BPSK) signals is presented. Theory of operation of this demodulator and circuit details for its implementation are given. This technique is useful in systems designed for burst data application requiring fast acquisition such as Time Division Multiple Acces (TDMA), Random Access Descrete ...
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Ultrasonic method for constructing a quadrature phase shift keying system

International Journal of Electronics, 1990
A quadrature phase shift keying (PSK.) system is developed using surface acoustic wave (SAW) devices. A SAW delay device having two or three interdigital transducers (IDT) operates as the key element for the modulation and demodulation of the communication system.
KOHJI TODA, TOSHIO IKEDA, MASAMI FURUSAWA   +2 more
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Offset Generator for Offset Quadrature Phase Shift Keying Modulation

2019
The key concept of this paper is development of an Offset generator architecture for Offset Quadrature Phase Shift Keying (OQPSK). Offset generator designed is embedded into QPSK and generates OQPSK modulation. The symbol pattern which the offset generator generates is such that there is only a maximum phase shift of ±90° between the consecutive ...
Alphyn Stanley, R. K. Sharma
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A 100 MHz MEMS SiBAR phase modulator for quadrature phase shift keying

2012 IEEE International Frequency Control Symposium Proceedings, 2012
A technique is proposed to employ the phase shifting capability of a MEMS resonator to form the basic component of a switchless quadrature phase shift keying (QPSK) scheme. The advantages of such an approach include direct baseband to RF modulation, no generation of intermodulation products since the resonator is operated linearly, and small size, cost,
Logan Sorenson, Farrokh Ayazi
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Design of a Quadrature Differential Chaotic Phase Shift Keying Communication System

2009 International Conference on Networks Security, Wireless Communications and Trusted Computing, 2009
This paper presents a new communication scheme, named quadrature differential chaotic phase shift keying (QDCPSK), which is developed from M-ary phase shift keying, chaotic phase and quadrature chaos shift keying (QCSK). It has not only the advances and characteristics of chaotic communication systems, but also higher efficiency of band usage and ...
Songsheng Zhu, Yinlin Xu, Kuixi Yin
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Multiple bit differential detection of offset quadrature phase-shift-keying

IEEE International Conference on Communications, 2003. ICC '03., 2004
Analogous to multiple symbol differential detection of quadrature phase-shift-keying (QPSK), a multiple bit differential detection scheme is described for offset QPSK that also exhibits continuous improvement in performance with increasing observation interval.
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From Quadrature-Quadrature Phase-Shift Keying to a New Multicarrier System

Frequenz, 2007
Khishigbayar Dushchuluun, Mohamed Fertat, Willmut Zschunke   +2 more
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Performance evaluation of 6.4 Tbps dual polarization quadrature phase shift keying Nyquist-WDM superchannel FSO transmission link: Impact of different weather conditions

AEJ - Alexandria Engineering Journal, 2020
Mehtab Singh, Jyoteesh Malhotra, M S Mani Rajan   +2 more
exaly  

Performance analysis of differential quadrature phase shift keying modulation schemes for a radio over fiber system

Journal of Optical Technology (A Translation of Opticheskii Zhurnal), 2021
Shilpi Verma, Sanmukh Kaur
exaly  

Homodyne Detection Quadrature Phase Shift Keying Continuous-Variable Quantum key Distribution with High Excess Noise Tolerance

PRX Quantum, 2021
Wen-Bo Liu, Yuan-Mei Xie, Chen-Xun Weng
exaly