shifting (2) Frequency shifting 07 (b) An audio signal 15sin2ᴨ (1500t) amplitude modulates a carrier 60 sin2ᴨ 07 (100‚000t). i) Sketch the audio signal. ii) Sketch the carrier. iii) Construct the modulated wave. iv) Determine the modulation index and percentage modulation. v) What are the frequencies of the audio signal and the carrier? OR 1 Q.4 (a) Determine the fourier transform of rectangular pulse shown below. Q.4 (b) A 107.6 MHz carrier is frequency modulated by
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FSK MODULATION AND DEMODULATION PROGRAM USING MATLAB LIST OF TABLES: CHAPTER 1: INTRODUCTION. 1.1-INTRODUCTION TO WIRELESS MODEM. 1.2-INTRODUCTION TO FREQUENCY SHIFT KEYING 1.2.1-FSK MODULATOR 1.2.2-FSK DEMODULATION CHAPTER 2: COMPONENT DESCRIPTION. 2.1-LIST OF COMPONENTS 2.2-DESCRIPTION OF FUNCTIONAL DIAGRAM 2.2.1 IC 555. 2.2.2 565 PLL. CHAPTER 3: CIRCUIT DIAGRAM AND WORKING. 3.1-CIRCUIT DIAGRAM OF FSK MODULATOR USING IC555. 3.2-CIRCUIT DIAGRAM OF FSK DEMODULATOR USING PLL 555 CHAPTER
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1.1 ABSTRACT: 2 .1 BLOCK DIAGRAM: Fig 2.1 Block diagram for FSK modulation and de-modulation 2.2.1 PIN DIAGRAM- IC 565 : Fig 2.2 Pin diagram for IC 565 2.2.2 PIN DIAGRAM -IC 555: Fig 2.3 Pin diagram for IC 555 3.1 DESIGN CALCULATION: 3.1.1 FSK MODULATOR: ON time TH=0.693RBC OFF time TL=0.693(RA+RB)C Total time T=TH+TL=0.693(RA+2RB)C 1 f1= -------------------------- → (1)
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Society SPACE VECTOR MODULATION –An Introduction == Tutorial at IECON2001== Dorin O. Neacsu Correspondence Address: Satcon Corporation‚ 161 First Street‚ Cambridge‚ MA 02142‚ Email neacsu@earthlink.net I. INTRODUCTION Space Vector Modulation became a standard for the switching power converters and important research effort has been dedicated to this topic. Tens of papers‚ research reports and patents were developed in the last ten years and the theory of Space Vector Modulation is already wellestablished
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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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International Journal of Computer Communication and Information System ( IJCCIS) – Vol2. No1. ISSN: 0976–1349 July – Dec 2010 Hardware Implementation of Viterbi Decoder for Wireless Applications Bhupendra Singh1‚ Sanjeev Agarwal2 and Tarun Varma3 1 Deptt. of Electronics and Communication Engineering‚ Amity School of Engineering and Technology‚ Noida‚ India Email: 1bsingh.tech@gmail.com 2‚3 Malaviya National Institute of Technology‚ Jaipur‚ India Email: 2san@mnit.ac.in‚ 3tarun.varma.jaipur@gmail
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TimeView™ ABCs of Modulation Domain Analysis Background An instrument like an Oscilloscope lets you view voltage variations over time. A Spectrum Analyzer lets you view voltage variations over frequency. A Modulation Domain Analyzer (MDA) lets you view frequency variations over time. Figure 1 shows all three dimensions pictorially. To analyze all dynamic properties of a signal‚ all three of these tools are required: Oscilloscope (v vs. t) Spectrum Analyzer (v vs. f) Modulation Domain Analyzer (f
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DIGITAL MODULATION Phase Shift Keying -One of the simplest forms of digital modulation is binary or Bi-Phase Shift Keying (BPSK). One application where this is used is for deep space telemetry. The phase of a constant amplitude carrier signal moves between zero and 180 degrees. On an I and Q diagram‚ the I state has two different values. There are two possible locations in the state diagram‚ so a binary one or zero can be sent. The symbol rate is one bit per symbol. A more common type of phase modulation
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the Stroop task‚ specifically‚ a demonstration of interference in the reaction time of a task. The counting Stroop task‚ likewise‚ was a factor in this experiment‚ agreeably a cognitive interference task. Eight volunteers agreed to test attention modulation pain in humans. A 3 T human MRI scanner conducted the scan of subjects. Functional imaging data covering the
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CS3282 Digital Comms 9.1 2 May’06 / BMGC Multi-level digital modulation & demodulation. 9.1. Introduction: So far‚ in looking at carrier modulated data transmission‚ we have concentrated mainly on binary signalling using simple forms of ASK‚ FSK and PSK. With a suitable pulse-shape‚ binary signalling can achieve a bandwidth efficiency of up to 2 bits/second per Hz using real unipolar pulses (base-band equivalent of ASK) or real bipolar pulses (base-band equivalent of PSK) at base-band.
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