"Modulation" Essays and Research Papers

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Sinc Function, Ssb-Am, Fm

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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the role of inventions and discoveries in the establishment of radio

improve the audio signal of radio. Radio waves, as mentioned earlier, travel at the speed of light. i.e.: three hundred thousand kilometers per second (300,00km/s). However, the transmission of radio waves is in two ways: Amplitude Modulation (AM) and Frequency Modulation (FM). In amplitude transmission, the strength of the carrier waves is varied to match changes in the progamme signal coming form the radio station. FM transmission on the other hand is such that the carrier waves remain constant but...

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Ttsl Training Report

takes information and converts it to a signal. • It operates upon the information to be communicated in such a way that some type of signal suitable for transmission is produced. • It includes encoding, compression, error correcting or modulation in order to make it suitable for transmission over the channel. TRANSMISSION MEDIUM • It is also called the "physical channel" that carries the signal. An example of this is the "free space channel". • Some amount of noise...

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A Primer on Satellite Communications

number of planned new satellites exceeds 1300. The design of a satellite communications system presents many interesting alternatives and tradeoffs. The characteristics include the choice of orbit, the method of multiple access, the methods of modulation and coding, and the tradeoff between power and bandwidth. In this article, these choices will be briefly described and hopefully a sense of why satellite engineers find this field of endeavor so fascinating will be conveyed. ORBIT The system...

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Software Defined Radio

library. i. M-ary number: 2 ii. Sample Time: 1 iii. Check the Frame-Based Outputs iv. Samples Per Frame: 30 v. Output Data Type: Boolean b. Modulator: M-PSK Modulator Baseband found in the Communications System Toolbox->Modulation->Digital Baseband Modulation->PM (Phase Modulation) library. i. M-ary number: 2 ii. Phase Offset: 0 iii. Constellation Ordering: Gray iv. Input Type: Bit Click the view constellation and observe the constellation of BPSK Modulator and note the logic to phase mapping. c....

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Opto Electronics

Advanced Optical Modulation Formats in High-speed Lightwave System by Sen Zhang Submitted to the Department of Electrical Engineering and Computer Science and the Faculty of the Graduate School of the University of Kansas in partial fulfillment of the requirements for the degree of Master of Science _________________________________ Professor in Charge _________________________________ _________________________________ Committee Members ________________________ Date thesis accepted ...

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Quadrature Amplitude Modulation

Quadrature amplitude modulation (QAM) ([pic] /ˈkwɑːm/ or /ˈkæm/ or simply "Q-A-M") is both an analog and a digital modulation scheme. It conveys two analog message signals, or two digital bit streams, by changing (modulating) the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme. The two carrier waves, usually sinusoids, are out of phase with each other by 90° and are thus called quadrature carriers...

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Ptcl Internship Report

CDMA. In CDMA different users are assigned same frequencies, same time but unique codes. The figure given below clears the basic concept of CDMA Figure2: CDMA Technique CDMA is basically a direct sequence spread spectrum method. It uses linear modulation with wideband pseudo noise (PN) sequences to generate signals. These sequences, also known as codes, spread the spectrum of the modulating signal over a large bandwidth simultaneously reducing the spectral density of the signal. Thus, various CDMA...

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Ofdm

Electronics and Communication Engineering, National Institute of Technology (Deemed University), Kurukshetra 136119, India Received 18 September 2007; accepted 14 April 2008 Abstract Orthogonal frequency division multiplexing (OFDM) is a very important modulation technique in wideband wireless communication and multimedia communication systems. While, it can effectively deal with multipath delay spread produced by frequency fading channels, its main drawback is the effect of frequency offset (FO) produced...

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Book Review in Communications

nonlinear device. 35) Desired cross products produced by mixing in a nonlinear device. Prepared By : APRIL A. BALDOVINO Nonlinear Mixing Harmonic Distortion Frequency Multiplication Cross Products Intermodulation Distortion Modulation 22 BOOK REVIEW IN COMMUNICATIONS CHAPTER 3 # Electronic Communications System By Wayne Tomasi OSCILLATORS, PHASE-LOCKED LOOPS, AND FREQUENCY SYNTHESIZERS DEFINITIONS TERMS 1) This word means to fluctuate between two states...

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