Principles of Communication $ • The communication process: Sources of information‚ communication channels‚ modulation process‚ and communication networks • Representation of signals and systems: Signals‚ Continuous Fourier transform‚ Sampling theorem‚ sequences‚ z-transform‚ convolution and correlation. • Stochastic processes: Probability theory‚ random processes‚ power spectral density‚ Gaussian process. & • Modulation and encoding: % ’ Basic modulation techniques and binary data transmission:AM
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What is X-ray Crystallography ? X-ray crystallography is an experimental technique that exploits the fact that X-rays are diffracted by crystals. It is not an imaging technique. X-rays have the proper wavelength (in th Å t ö (i the Ångström range‚ ~10-10 m) t be scattered by the electron cloud of an atom of 10 10 ) to b tt d b th l t l d f t f comparable size. Based on the diffraction pattern obtained from X-ray scattering off the periodic assembly of molecules or atoms in the crystal‚ the electron
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all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. Q.1 (a) Derive Friiss formula for noise factor of cascaded amplifier. 07 (b) Prove that ESD of any signal g(t) is the fourier transform of the 07 autocorrelation function Rg(.)ح Q.2 (a) Draw the circuit diagram of capacitive tap and derive the equation for 07 transfer impedance. (b) Explain Double-conversion superhetrodyne receiver using block diagram. OR (b) Explain
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The Basics of NMR Chapter 1 INTRODUCTION [pic] NMR Spectroscopy Units Review [pic] NMR Nuclear magnetic resonance‚ or NMR as it is abbreviated by scientists‚ is a phenomenon which occurs when the nuclei of certain atoms are immersed in a static magnetic field and exposed to a second oscillating magnetic field. Some nuclei experience this phenomenon‚ and others do not‚ dependent upon whether they possess a property called spin. You will learn about spin
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Sound and acoustics It is common to think that acoustics is the study of music. Although acoustics does comprise the study of musical instruments‚ it also includes an extensive range of topics‚ including: SONAR systems‚ noise control‚ ultrasounds for medical imaging and other processes‚ electroacoustic communication‚ seismology‚ etc. [1] In general‚ acoustics is the study of mechanical waves including sound‚ vibration‚ infrasound and ultrasound. When talking about the acoustics‚ it is essential
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Gd2O3 nanopowders doped with different concentrations of Er3+ and Yb3+ were synthesized using the combustion method. The starting reagents‚ Gd(NO3)3 6H2O‚ Er(NO3)3 5H2O‚ Yb(NO3)3 xH2O and NH2CH2COOH (glycine)‚ which was used as a fuel in reaction‚ of an analytical grade were purchased from Sigma Aldrich and Alfa Aesar. The ratio of glycine to nitrate was kept as 0.56 [31‚ 32]. The appropriate amounts of the starting reagents were dissolved in a minimum amount of deionized water. The solution was
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Modulation Techniques Modulation Techniques Modulation is the process in which a signal is entered into and transmitted by a signal carrier. There are several ways signals can be modulated and differ based on the equipment and technique utilized. Three common ways that signals are transmitted include a 56K modem‚ an asymmetrical digital subscriber line (ADSL)‚ and Wireless Fidelity (Wi-Fi). Each of these methods are effective means of transmitting a digital signal‚ however‚ the 56K modem is all
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figure1. The yield % of the synthesized polymer was calculated by the equation: Yield %= (Weight of synthesized polymer)/(Weight of the monomers taken) ×100 Characterization of synthesized polymer: Chemical analysis using Fourier transform infrared Spectroscopy: Fourier transform infrared (FTIR) spectrum of monomers and synthesized PLGC was obtained in the range of 4000-400 cm-1 using at least 40 scans at a resolution of 4 cm-1. The monomer L-lactide and glycolide spectrum was recorded using
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Please verify that (1) all pages are present‚ (2) all figures are correct‚ (3) all fonts and special characters are correct‚ and (4) all text and figures fit within the red margin lines shown on this review document. Complete formatting information is available at http://SPIE.org/manuscripts Return to the Manage Active Submissions page at http://spie.org/app/submissions/tasks.aspx and approve or disapprove this submission. Your manuscript will not be published without this approval. Please contact
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The Hong Kong Polytechnic University EIE331: Communication Fundamentals File name: eie331 03am.pdf CONTINUOUS-WAVE MODULATION SCHEMES: AMPLITUDE MODULATION (AM) • Double sideband amplitude modulation (DSB) • Frequency spectrum and power relationships of the AM signal • Modifications of amplitude modulation: – Double sideband – suppressed carrier (DSB–SC) – Vestigial sideband modulation (VSB) – Single sideband modulation (SSB) • Frequency-division multiplexing (FDM) ´ G´za KOLUMBAN
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