The Communications Edge ™ Tech-note Author: Bob Watson FSK: Signals and Demodulation The most commonly used signal parameters for describing an FSK signal are shown in Figure 2. The minimum duration of a mark or space condition is called the element length. Typical values for element length are between 5 and 22 milliseconds‚ but element lengths of less than 1 microsecond and greater than 1 second have been used. Bandwidth constraints in telephone channels and signal propagation
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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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Shift Keying (FSK) Contents Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide Slide FSK-1 FSK-2 FSK-3 FSK-4 FSK-5 FSK-6 FSK-7 FSK-8 FSK-9 FSK-10 FSK-11 FSK-12 FSK-15 FSK-16 FSK-17 FSK-18 FSK-19 FSK-20 FSK-22 FSK-23 Introduction The FSK Transmitter The FSK Transmitter (cont. 1) The FSK Transmitter (cont. 2) The FSK Transmitter (cont. 3) The FSK Transmitter (cont. 4) The FSK Transmitter
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AMPLITUDE MODULATION AND DEMODULATION : OBJECTIVE : Study how to perform the amplitude modulation and demodulation and to calculate the modulation index for various modulating voltages. Theory : AMPLITUDE MODULATION : Modulation is defined as the process by which some characteristics of a carrier signal is varied in accordance with a modulating signal. The base band signal is referred to as the modulating signal and the output of the modulation process is called as the modulation signal. Amplitude
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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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sampling and TDM To Implement AM & FM modulation and demodulation To implement PCM & DM To implement FSK‚ PSK and DPSK schemes To implement Equalization algorithms To implement Error control coding schemes LIST OF EXPERIMENTS: 1. Signal Sampling and reconstruction 2. Time Division Multiplexing 3. AM Modulator and Demodulator 4. FM Modulator and Demodulator 5. Pulse Code Modulation and Demodulation 6. Delta Modulation and Demodulation 7. Observation (simulation) of signal constellations
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Chapter 9 MODULATION AND DEMODULATION D ata modulators‚ especially those intended to produce constantenvelope output signals‚ are “high-leverage” components in that even very small deviations from ideal in their behavior can lead to large degradations in overall system performance. Therefore‚ successful simulation of wireless communication systems depends upon the use of modulator models that capture all of the significant deviations from ideal behavior. In the “usual” development of
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shifting value between the two selected amplitude. 2) Frequency Shift Keying (FSK) FSK is a modulation technique that related with the frequency shifting or changes of carrier signal to transmit the digital information. In simple cases of FSK modulation‚ one of the two frequencies transmits the digital data which is one of the frequencies will transmit ‘0’ while the other frequency transmits ‘1’. There are several types of FSK modulation that
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1INTRODUCTION Are you tired of slow modem connections? Cellonics Incorporated has developed new technology that may end this and other communications problems forever. The new modulation and demodulation technology is called Cellonics. In general‚ this technology will allow for modem speeds that are 1‚000 times faster than our present modems. The development is based on the way biological cells communicate with each other and nonlinear dynamical
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