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 — Dept. of Electronic and Information
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also with remodulated ONUS and a coherent receiver OLT ‚various technique to control PAPR(peak to average power ratio)‚different types of modulation methods with pre-emphasis technique‚ an idea abot MAMSK-OFDM technology for next generation‚putting the Doppler shift into usuage into intelligent transportation system‚comparison between different types of modulation scheme and OFDM‚directly modulated signal transmission over fiber in WDM –PON S. H. Lee 2011 (et.Al) a new low-cost solution using orthogonal
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1.227 and 1.575 MHz • radio communications in space: 2290 MHz to 2300 MH Amplitude modulation (AM) - the amplitude of the carrier from a transmitter is varied according to the signal against the signal of interest‚ which is the modulating signal. The frequency and carrier phase are kept constant. An AM signal is very prone to static and other electrical interference. Frequency modulation (FM) - changes the carrier frequency according to the information being conveyed. In FM‚ unlike
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Spring 2010 Instructor: Nahid Rahman Assignment #1 Total Marks: 100 Worth: 7.5% 1. Consider the sinusoidally modulated DSB LC signal shown below. The carrier DSB-LC frequency is ωc and the message signal frequency is ωm. (a) Determine the modulation index m. Solution: Amax = 25 Amin = 5 − 25 − 5 = = 0.67 + 25 + 5 (b) Write an expression for the modulated signal φ(t). Solution: 1 1 ) = (25 − 5) = 10 = ( − 2 2 1 1 ) = (25 + 5) = 15 = ( + 2 2 = + cos = cos + ( ) cos Assignment 1 Sol Page: 1
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operation in the 5 GHz band‚ where there is relatively less interference and more channels are available compared to the 2.4 GHz band. 802.11ac achieves higher performance than 802.11n by using more spatial streams‚ wider bandwidth‚ higher order modulation‚ and enhanced bandwidth management techniques. The purpose of the 802.11ac amendment is to “improve the Wi-Fi user experience by providing significantly higher throughput for existing application areas‚ and to enable new market
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TELECOMMUNICATION 1 2012-2013 Fall Project SINC FUNCTION‚ SSB-AM‚ FM Name: Onur Mustafa Erdoğan ID Number: 10014044 Submission Date: 24.12.2012 Abstract: In these project‚ I will analyze Fourier Transform of sinc function and it’s modulation.(SSB-AM‚FM) I will explain SSB-AM and FM theoretically and solve their math model in steps. After all‚ I’ll use simulations and graphics to prove my solutions and In the and‚ I will write my conclusions down. Introduction SSB-AM [1]In
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Synchronous Digital Hierarchy (SDH) Survey Report Objective: To conduct a survey on the SDH technology and its implementation in Pakistan SUBMITTED TO: SIR MUHAMMAD RAMZAN Saman Ishtiaq Malik (Reg No. 206) Shumaila Batool (Reg No. 209) Sumaira Shamim (Reg No. 212) Hira Jafri (Reg No. 214) Yumna Ghazi (Reg No. 217) Zonera Tahir (Reg No. 220) 0|Page Certificate of Originality We hereby declare that this submission is our own work and to the best of our knowledge of belief‚
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Ugochukwu‚ Obum E‚ MSc.dissertation Investigation of the effect of different channel estimation techniques on FBMC-IOTA systems OBUM UGOCHUKWU Master of Science in Mobile Communications systems from the University of Surrey Department of Electronic Engineering Faculty of Engineering and Physical Sciences University of Surrey Guildford‚ Surrey‚ GU2 7XH‚ UK Supervised by: Dr. Mehrdad Dianati Dr. Razieh Razavi September 2014 i Ugochukwu‚ Obum E‚ MSc.dissertation Abstract Filter bank multicarrier
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Noise (AWGN) channel. Particularly‚ each student should investigate the effect of various parameters such as SNR‚ cyclic prefix/guard interval‚ number of subcarriers M‚ number of Monte-Carlo simulation loop nloop‚ type of modulation (qammod‚ pskmod) with different values of modulation levels q. Given the Matlab code that implements the OFDM system in AWGN channel‚ it is required to prepare a report that includes the following: 1. Study the effect of the length of the guard interval on the BER performance
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VSAT‚ HEC. --------- PMD: Physical Medium Dependent ITU-T: International Telecommunication Union – Telecommunication standarization section THF: Tremendously High Frequency PSTN: Public Switched Telephone Network QAM: Quadrature Amplitude Modulation FTTC: Fiber To The Curb SONET: Synchronous Optical NETwork AMPS: Advanced Mobile Phone System VSAT: Very Small Aperture Terminal HEC: Header Error Control Problem 3 Suppose that a link between two telephone offices has 50 repeaters. Suppose
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