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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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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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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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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Digital modulation differents kind and aplications form them. Digital Modulation Techniques The techniques used to modulate digital information so that it can be transmitted via microwave‚ satellite or down a cable pair are different to that of analogue transmission. The data transmitted via satellite or microwave is transmitted as an analogue signal. The techniques used to transmit analogue signals are used to transmit digital signals
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Amplitude modulation or AM as it is often called‚ is a form of modulation used for radio transmissions for broadcasting and two way radio communication applications. Although one of the earliest used forms of modulation it is still in widespread use today. The first amplitude modulated signal was transmitted in 1901 by a Canadian engineer named Reginald Fessenden. He took a continuous spark transmission and placed a carbon microphone in the antenna lead. The sound waves impacting on the microphone
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Prelab 3 1: The operations involved in the modulation of DSB-SC are: A message signal and carrier signal are fed in to a mixer which effectively modulates the message signal. The figure below demonstrates this step: Mathematically‚ this is expressed as the following: The resultant waveform can be demodulated by multiplying the modulated signal by the carrier signal of the same frequency and then using the low pass filter to filter out the remaining frequencies to get the frequency required
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