نتایج جستجو برای: phase shift keying

تعداد نتایج: 719781  

Journal: :Optics express 2014
Abel Lorences-Riesgo Lan Liu Samuel L I Olsson Rohit Malik Aleš Kumpera Carl Lundström Stojan Radic Magnus Karlsson Peter A Andrekson

We report on quadrature demultiplexing of a quadrature phase-shift keying (QPSK) signal into two cross-polarized binary phase-shift keying (BPSK) signals with negligible penalty at bit-error rate (BER) equal to 10(-9). The all-optical quadrature demultiplexing is achieved using a degenerate vector parametric amplifier operating in phase-insensitive mode. We also propose and demonstrate the use ...

Journal: :International Conference on Aerospace Sciences and Aviation Technology 1999

2011
Tao Wang

This paper describes a design of signal generator based on direct digital synthesis technique (DDS). According to the basic principles of DDS using Matlab/DSP Builder establish DDS model, then compiling by the SignalCompiler tools and generating VHDL code. Finally download the relevant documents to the field programmable gate array (FPGA) chip EP2C5Q208C8N. EP2C5Q208C8N and digital-analog chip ...

Journal: :International Journal of Engineering & Technology 2017

Journal: :EURASIP J. Adv. Sig. Proc. 2012
Yen Mei Chee Ahmad Zuri bin Sha'ameri Boualem Boashash

This article presents a novel algorithm based on the cross-Wigner-Ville Distribution (XWVD) for optimum phase estimation within the class of phase shift keying signals. The proposed method is a special case of the general class of cross time-frequency distributions, which can represent the phase information for digitally phase modulated signals, unlike the quadratic time-frequency distributions...

2015

This paper is focusing on development of ZigBee transceiver at physical layer using IEEE 802.15.4. ZigBee technology was developed for a wireless personal area networks (PAN), aimed at control and military applications with low data rate and low power consumption. ZigBee is a low-cost, low-power, wireless mesh networking standard. First, the low cost allows the technology to be widely deployed ...

2003
Wai Fong Andrew Gray Pen-Shu Yeh

The High Rate Baseband Multi-Modulator (HRBM) ASIC is being developed to provide High-Speed Bandwidth Efficient Modulations to NASA missions. Bandwidth efficiencies from 2.0 bits/symbol/Hz to 2.75 bits/symbol/Hz are selectable from three CCSDS modulations: Gaussian Minimum Shift Keying (GMSK), Filter Offset Quadrature Phase Shift Keying (Filtered-OQSK) and 8-Phase Shift Keying Trellis Coded Mod...

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