fm modulation and demodulation experiment conclusion

Feedback . ",#(7),01444'9=82. Lab 5: Amplitude Modulation and Demodulation This lab introduces students to communications theory with amplitude modulation and demodulation. 0000013397 00000 n 0000042192 00000 n There are two methods for frequency demodulation such as direct method and indirect method. First, since FM only changes the frequency and not the amplitude of the carrier w ave, FM receivers can be built to ignore amplitude (voltage) changes. To study Pulse Amplitude Modulation a. using switching method b. by sample and hold circuit 7. Experiment Program Outcomes Attained Program Specific Outcomes Attained 1 LTI system and its response PO1, PO2 PSO1 2 Amplitude modulation and demodulation PO1, PO2 PSO1 3 DSB-SC Modulator & Detector PO1, PO2 PSO1 4 SSB-SC Modulator & Detector (Phase Shift Method) PO1, PO2 PSO1, PSO2 5 Frequency modulation and demodulation. endstream A phase-locked loop (PLL) can be used to create a complex but high-performance circuit for FM demodulation. 0000057548 00000 n 2. Basic Information . <>>>/BBox[ 0 0 832.17 323.07] /Matrix[ 0.08652 0 0 0.22286 0 0] /Length 50>> A phase locked loop is a well known method of demodulating an FM signal. The spectra of tone-modulated FM signals are analyzed as well. 0000001348 00000 n In any radio that is designed to receive frequency modulated signals there is some form of FM demodulator or detector. In this experiment, we shall consider demodulation using envelope detector. fc >>fm 2. S. No. 1. Found inside â Page 3244However , for the purposes of this experiment , it does not detract from the results and the concept is still validated . ... The spectrum analyzer's FM demodulation function is designed for monitoring audio modulation on radio signals ... To study and perform Pulse Position 6 To study and perform Pulse Code Modulation and Demodulation. Found inside â Page xvi148 7.4.2 Experiment 7.2: Coherent Demodulation of an SSB Signal . ... 150 8 Frequency Modulation 151 8.1 The FM Signal and Some of its Properties . EXPERIMENT 2. Introduction Frequency modulation is a form of modulation, which represents information as Found inside â Page 51In these virtual experiments, modulation and demodulation process will be simulated clearly, and at the same time, its waveform and frequency spectrum will ... From the experiment we found that the output of demodulated signal depends only on the frequency variation of the input signal. Cumsum models the integration operation for a digital signal, which means that the 3�'�8��8��w��"�2�͡��N��^�A"\�^E�q��B+L{L�� wت��0Ɓ��$�!��>��4��I��B��cQ?fW`D��!��'��x~Q1~:�Q�'_��!c�sq��y��.��zXD�˯��tɁZMH?f��Y&��4��{��O7`�l�S��g�d�x�8�믌��"2 �9f�� `�ȑe> ��N��?>��{W��m��HG�뙇��#�T/�K��2a)��kM䈆�m��v}�(`ؚ�9��Yu��F�'a$�a$5M�%��) ��υE�k5q�&C� I�,Ŵu-��ô�n�FOMA��7Fr��h `l�TQ�}��4��4�M=�d(ż�Cɏ��6��eGKMːq�ԭ�iS��F6 � cuƞ�0�=��D��YK�g}$"X��b��o�;f~��縻�ҔL⤆.mv�g��L+� �aH��#!%�$4�f٘�� ? Found inside â Page 201Experiment result 6 Conclusions and Future Works In this paper, ... In the future we can add the modulation and demodulation module to increase the system ... endobj 2 0 obj Found inside â Page 847 shows the result of a similar - type experiment involving in this case the ... tank circuit where the phase modulation of f , takes place , it was felt ... By observing the results obtained we can conclude that demodulation of the modulated signal can be It is the simplest method for PWM generation. Study of AM waveform and spectra. The main reason for the improved fidelity is <> Download Laboratory Exercise Amplitude Modulation and Demodulation PDF for free. The FM band is divided between a variety of purposes. 5��?P��D��_ ��Z�20�8�a`�p``�a`(f``[��°])��A�e�200[�m|6:6�Zs�A�� l��*(��tE�� The first four chapters of the text present basic principles, subsequent chapters offer ample material for flexibility in course content and level. -�5inc��M��t�N'sm��D>��)fҠ��-�?J�� '�7N��h)&�k[�g-#6�m�ɯ�vr��Y�o�0��C#�u�x.7,�h4lD;��q��Ɓ��%�؟/�c)�G��0s&܀�3Lh;��t��V]��&��:g\�\��ғZ�hh�$��k��U��.��԰c*}�zG'��.+v(Wx�F��r��M��E��\��0��UkF[�7�Ļ�d�Ê��*��~�3E�+�+��?�z��Nڐf��c/Mn��z)J"��r/��K�n�U�/�b�%XXz��[o�`ܘ��j�:8q��1>xr��:��t��Mϡ�g��\H��F��ڟ7:��ӧؼ��%&�z=��x4�[�й6��.�{:��j�U��s2��pq|ab��`��H��)v�:~��n� m�g��ϭ�%�4C�l��4�i��t�0�!봱=�k��D4��ܓ�x�3�ɪAy|$�� ki5��1�� V�/]�>�pϲ�b^��m�&�d�?��B~�0�e*��1J�W}�]��AT��ht�o��Jm��pOeӼ|.�{z��zCU��ט{кAg��mvX��x��VZb@ z&޾�.��!�A^�� ulH �q3��T?a�Uks��Êrce�I� C��x6�Mq�1��]��!/��}��v$G�3��}1��:��]��|��%=&�Gf ��6�jf˼�C'(i��ρ�8��=*4z�>��\,q$x��@��{HI�SZ��LM�ߔG��Z�E_�+�h&�$< ��^��7(鮂=v Theory . 0000046257 00000 n modulation and demodulation process. FM demodulation basics. To understand the theoretical foundations of Analog Communications as well as of Double-Side-Band Amplitude Modulation and Demodulation (DSB-AM) To design the Simulink model of the DSB-AM to analyze each signal in time and frequency domains using time scope and spectrum analyzer Pulse Width Modulation & Demodulation 8. EEP306 LAB REPORT AMPLITUDE MODULATION SUBMITTED BY:GROUP3 Umang Gupta (2010EE50564) IndraBhushan (2010EE50548) VivekMangal (2010EE50566) Jitendra Kumar Meena (2009EE50483) 12-9-12 Experiment. The main goal of the experiment of the third laboratory is getting familiar with AM modulation technique. 4 0 obj In this video I tried to explain the experiment "Amplitude Modulation and Demodulation". . For example, for a signal modulated with a linear modulation, like AM (Amplitude Modulated), we can use a synchronous detector. 13 0 obj Find more similar flip PDFs like Laboratory Exercise Amplitude Modulation and Demodulation. On the other hand, for a signal modulated with an angular modulation, we must use an FM (Frequency Modulation) demodulator or a PM (Phase Modulation) demodulator. An accessible undergraduate textbook introducing key fundamental principles behind modern communication systems, supported by exercises, software problems and lab exercises. Frequency modulation equations mainly consist of a sinusoidal expression with the integral of the baseband signal that can be either a sine or cosine function. Frequency modulation is a type of signal encoding. Found inside â Page 395Unstable TO-PLL could be used as a FM demodulator but modulation index as well as ... of modulator and demodulator through prototype hardware experiment. Experiment theory: From experiment 3, we know that the amplitude modulation signal utilizes the amplitude of audio signal to modulate high frequency carrier signal. 0000051711 00000 n Any notes or screenshots taken can be used as sources. To study and perform Frequency Modulation and Demodulation. 11 0 obj 0000001494 00000 n Found inside â Page 29The transmitter was Radio Paris ( 863 kc / s , 150 kw ) modulated 60 and 30 % with ... no conclusion was obtained , and new experiments were necessary . 1. • Understand how do AM and FM radio and analog TV work in terms Found insideConfirm the result on the Scope and Frequency displays. ... In this experiment, students will implement modulation and demodulation scheme for narrow band ... endobj 0000055792 00000 n 2. $.' Experiment 15: Frequency Modulation Purpose and Discussion The purpose of this simulation is to demonstrate the characteristics and operation of frequency modulation using Multisim's Frequency Modulator. Found inside â Page 389Modulation / demodulation waveforms . Bottom trace : modulation current , top trace : demodulated signal . ... WW nonideal demodulation , f m In conclusion , the realization of a homodyne optical communication system based on optical PM ... <> 0000041590 00000 n As stated earlier, an envelope detector has been used here for demodulation. 1 0 obj Short Paper—Simulation of Analog Modulation and Demodulation Techniques in Virtual Instrumenta… 3 Conclusion In this short paper the implementation of AM and FM modulation techniques are successfully carried out using NI USRP RIO 2920 and LabVIEW. 0000007847 00000 n 0000001962 00000 n An envelope detector (Figure 6(a)) is an electronic circuit that takes a high-frequency modulated signal as input and provides an output which is the "envelope" of the original signal. Yet, AM continues to be used today in many communication applications Detailed explanations of the concepts and algorithms behind OFDM-context that is missing from the two OFDM books currently available. This book explains OFDM WLAN basics, including components of OFDM and multicarrier WLAN standards. Phase locked loop. Then, students will use LabVIEW to program an AM . Build simple envelope detector for AM demodulation. To study PLL 565 as frequency demodulator 5. The Circuit of the Demodulator used is as shown below: 2. The second section will be the design of the FM radio front end. Lab 1 - AM Modulation - Prof. Dutton - EE133 - Winter 2004 1 EE133 - Lab 1 Amplitude Modulation and Demodulation 1 Lab Notes • A Word about Power: Remember that the SA612 is not rated for 9V. The book is intended to provide a workable knowledge and intuitive understanding of RF and microwave electronic circuit design. frequency modulation. (Louis E. Frenzel Jr,2016). FM modulation and demodulation system and then carry out simulation. That design wasn't meant for passing frequencies high enough to be able to pass an audio file, e.g. Pulse code modulation is a method that is used to convert an analog signal into a digital signal so that a modified analog signal can be transmitted through the digital communication network. When the audio signal is modulated onto the radio frequency carrier, the new radio frequency signal moves up and down in frequency. non-coherent-FSK-detection. FM: frequency modulation or PM: phase modulation . Found inside â Page 313Experimental Results To effectively demonstrate the measurement accuracy of the digital AM / FM / OM demodulation techniques ... Conclusion A series of experiments were performed keeping all parameters constant except for the modulating ... The demodulation exercise was used to demonstrate how a signal is reconstructed at the receiver to obtain the original message. Quiz . Found inside â Page 92... Modulation , Demodulation , Transmitterreceivers , Phase shifters , Frequency shift keyers , Performance ( Engineering ) This report covers the results ... endobj 0000047802 00000 n FM demodulator circuits are found in any receiver that uses FM: broadcast receivers, two way radios like walkie talkies and handheld radios that use FM, and any receiver where frequency modulation is used. PWM signal can be generated by using a comparator, where modulating signal and sawtooth signal form the input of the comparator. The technology is used in telecommunications, radio broadcasting, signal processing, and computing.. 3. stream Found inside â Page 88These dip points appear at the frequency multiples of 1 / Td . The measurement results of frequency domain are compare with the ... In our experiment , we used the frequency discriminator to demodulate a carrier with FM modulation . Richard W. Middlestead, Search for more papers by this author. H�b``�b``��A��b�,=@΂�WXVp�f�b`К�'�$Ɓp�m�X뵐�q�]��Ƈ�6&�\�}�Oeg�cS,��Dh�UM>��%�=��9낌 ��d6��-U?oj� jo�W��k��7�9me;p�)�I��"�}غ2�⃅�w@-KK��h 2��;`��Q��T ��CDX\@��d?�m�7i] v�c�cfa� <> • Measuring and adjusting an amplitude modulator circuit • Understanding the principle of amplitude demodulation. It has many advantages over AM. 5 Modulation and Demodulation. The m-file pre6_1.m is designed to show the frequency variation more clearly in the time domain. 0000001469 00000 n FM Modulation/de-modulation Circuit: I got the idea for this circuit from one of my professors. 2- To understand the operation theory of pulse coded modulation (PCM). endobj FM Modulation and Demodulation Goal: The goal of this experiment is to become familiar with FM modulation and demodulation. Ɵ → is the phase of the modulating signal. Slide 22 Experiment 8.1 FM Modulator (cont. 0000015797 00000 n As FSK is really just FM (with a digital message), it can be recovered using any of the FM demodulation schemes. This textbook takes a unified view of the fundamentals of wireless communication and explains cutting-edge concepts in a simple and intuitive way. 0000014503 00000 n To study amplitude demodulation by linear diode detector 3. SSB-SC Modulator & Detector (Phase Shift Method) 5. 0000040141 00000 n Check Pages 1 - 6 of Laboratory Exercise Amplitude Modulation and Demodulation in the flip PDF version. Found inside â Page 46-3The articulation tests have been divided between the different experiments taking into accound the following factors : the learning ... The two systems to evaluate were SSB - FM modulation with FM demodulation and with AM demodulation . Found inside â Page 213Through many experiments, the basic functions of the system are complete, ... to test the modulation and demodulation performance, the frequency modulated ... N��M,ٽ��VlC1F�M�>J�6f�B8��=�,E-&} 1. EXPERIMENTS STEPS & RECORDS 1st Part: Demodulation of Input Modulated message signal with a Product Detector Experiment Procedure 1. 0000014710 00000 n Found inside â Page vExperiment 2 - Demodulation of Microwave FM Light Using a Pulsed Ruby Laser 3. Experiment 3 - Demodulation of Microwave FM Light Using a CW Helium - Neon Laser 81 82 VI . CONCLUSION 85 APPENDIXES A. 87 B. 88 . AMPLITUDE DEMODULATION The process of detection provides a means of recovering the modulating Signal from modulated signal. <>>> 2. In addition, the FM band also includes FM radio, which operates from 88 MHz to 108 MHz. wv4�w8��M�s^�wk5�x�A��}K�� >��']�9Lb��Q �C�D��B�E�,܇k�X��c6�YΆ��~��a�N�cl>�s��PѝB��cQ.ۂ"SLюpC�,��!a��]�7��+S!ܚ�qr�V��`*h|��p� 5��Rm�k��2h��㢉5��a|M��K*�:y�Y�7��U��.�т��`x\f4v�Vrԍ��]�d ��-��{J�&�Yn ��wK��vǬQB��D�Jz� ��H#K��-j�-Ҩ� [ 7 0 R] Found insideThis new edition features more end-of-chapter problems, new content on two-dimensional signal processing, and discussions on the state-of-the-art in signal processing. Objective 1. I. . 833.18 0 0 324.08 0 -1.0071 cm This demodulator requires taking a Hilbert transform but does not require ﬁltering out terms at twice the carrier frequency. PHASE SHIFT KEYING (PSK) MODULATION, DEMODULATION, AND PERFORMANCE. Found inside â Page 369Then the FM signal of various modulation indexes was applied and the maximum ... Table 2 shows the summary of the responses of the FM demodulation process. . 1. Demodulation is performed by detecting the amplitude level of the carrier at every symbol period. The index of modulation can be varied by changing Am. : https://bit.ly/2RBiAkW Follow me on instagram: https://www.instagram.com/learn_overf...Interesting video : https://youtu.be/03ywI-WNEHcUseful Video : https://youtu.be/lpYwEPe-l4sLIKE || SHARE || COMMENTThis is 100 % free tutorials so please SUBSCRIBE my channel . Amplitude Modulation and Demodulation!! Students will explore the mathematical theory behind amplitude modulation and use the Analog Discovery Studio to visualize the effects of amplitude modulation in the time and frequency domains. Highlighting the new aspects of MATLAB 7.10 and expanding on many existing features, MATLAB Primer, Eighth Edition shows you how to solve problems in science, engineering, and mathematics. Found inside â Page 37Concerning the modulation-domain, the digitized signal has gone through a straightforward I/Q demodulator, and tuned on the expected value of f*, ... The conclusion is . 0000046761 00000 n Its demodulation always requires the availability of the carrier signal in the demodulator. Pulse Code Modulation (PCM) Objectives . Conclusion: Inthis experiment, you will examine the characteristics of amplitude modulation (AM). Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal. The student will learn the basic concepts of SSB modulation and using the theoretical knowledge of courses. 3) Slide 26 Experiment 8.3 Demodulation by a Discriminator Slide 27 Experiment 8.3 Discriminator (cont. The purpose of this paper is to describe a simple circuit simulation project that demonstrates the relevant concepts in an intuitive manner. 0000002270 00000 n If the modulation index is greater than unity, the ca rrier wave becomes over modulated. In this FSK experiment, FSK can be generated by the 555 timer IC and detection can be possible by 565IC which is known as a phase-locked loop (PLL). 0000047252 00000 n CONCLUSION (Write a short comment and conclusion about the experiment.) 0000039097 00000 n Procedure . 1) Slide 26 Experiment 8.2 FM Spectrum (cont. In this video I tried to explain the experiment \"Amplitude Modulation and Demodulation\". focuses on PSK-modulated waveforms and the description of constant amplitude modulations that involving continues-phase frequency modulation (CPFM) and frequency shift keying (FSK). :��Hl>c6ڤ�G��g҄�R�8�|i��~��X2��rqz�]��/�W��U�3��"��,��U�V1!��Lh��bF��=e�e�ö~`�Uk��ì ��l��P�=��"l�y�� +��m�c�M~��0S^��y-�S��;�Y5��ėbv��h��bj�0�� RL(O,�\�VzP&=�9�Z+�M� You will model the PLL, and recover the message from the FM signal. A m → Amplitude of the modulating signal. 0000050225 00000 n Theﬁrst useof AM fortransmissionofvoice signalsbyradiocan be traced tothebeginning of the 20th century. Any notes or screenshots taken can be used as sources. endobj The design approach is to design the FM demodulator as if it were an analog phase lock loop, The carrier at the demodulator must have the same frequency and phase of the carrier at the transmitter . Modulation is defined as the process of transmission of information such as images or videos on an electrical signal. <> In analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the instantaneous frequency deviation, i.e. 0000002199 00000 n Demodulation is defined as the process of extracting this information. . /Image13 Do Q Found inside â Page 317And these technologies are able to combine the multiple frequency allocations on digital domain using the complex quadrature modulation and demodulation ... ��:QW92Hk �u��Rr��W[��n��1. Since its introduction and popularization throughout the first half of the twentieth century, FM has gained significant popularity and became widely used in multiple areas. ! PCM is in binary form, so there will be only two possible states high and low(0 and 1). Use the RC-LPF in the UTILITIES module. 2. %PDF-1.5 I tried to explain the circuit connections that is needed for the experiment. Experiment . The simplest interpretation of the modulation index, b, is as a measure of the peak frequency deviation, D f. In frequency modulation (FM), variations in the frequency of the modulated wave are observed with changes in the message signal. Found inside â Page 29The transmitter was Radio Paris ( 863 kc / s , 150 kw ) modulated 60 and 30 % with ... no conclusion was obtained , and new experiments were necessary . The next part of the experiment lets you do this. A double sideband large carrier waveform is produced using a simple switching modulator circuit. message signal m (t) i.e. Experiment 3- AM Demodulation Purpose: Understanding the amplitude demodulation principle. Found inside â Page 3However , as the attainable depth of frequency modulation is increased , the FM phototube may possess a significant ... In Chapter 4 the design of the optical and microwave interaction systems is considered , and general conclusions ... Experiment 5: Frequency Modulation In this experiment, the generation of frequency modulated signals by the direct method and the demod-ulation of the message signal using a phase-lock loop circuit are considered. 0000045776 00000 n VWS&��!1�?~%�e��F��"UB��5��&&%ܕ�L��O�L0��Zɕd;�`_� C��h 9U�/��Y��9��&͍�0$u4��a�Z�Y�� N�*�pMch��=��M�?Tb��#}b1ꖛ�)7�� U��^��dQ�Trا. If this minimum value is zero, the modulation depth is 100%.For amplitude modulation,modulation depth = (a-b)/(a+b),wherea is the unmodulated carrier amplitude, andb is the minimum amplitude . Pulse Position Modulation & Demodulation 9. T1 make a model of the PLL of Figure 1. The process of demodulation usually involves detecting the envelope of the AM signal. 1.2circuitdesignrequirements It is required to be proficient in the application of MATLAB language to write basic communication system applications, analog modulation system, digital baseband signal transmission system Found inside â Page 102Results of these experiments are plotted in Figs . ... 2 FREQUENCY ON PEAK FREQUENCY DEVIATION OF 374 c / s MODULATION WITHOUT 2ND HARMONIC FILTER 25 O ... 0000002397 00000 n 2. Although AM modulation technique is an old modulation technique, it's still used in many areas like TV broadcasting, amateur radios, radio etc. Experiment 2: Amplitude Modulation and Demodulation Objective Amplitude modulation (AM) is one of the simplest methods for modulating a sinusoidal carrier wave. CONCLUSION […] We can also define a modulation index for FM, analogous to AM: b = D f/f m , where f m is the maximum modulating frequency used. Found inside â Page 90Comparison with Frequency Modulation for Television Transmission by Satellite This Section draws a brief comparison between the 60 Mbit / s digital television transmission results and the analogue FM television transmission results for ... Found inside â Page 344Results show time-frequency demodulation with LMD can comprehensively detect the modulator and carrier information. The proposed technique is then used in ... Transmitter and receiver are simple in Amplitude modulation. Experiment and Results Show and clarify your results during the experiment. age 6.671.2. . It is thus capable of demodulating an FSK signal. In this experiment, another widely used modulation technique will be introduced: Frequency Modulation (FM). To study sampling and reconstruction of Pulse Amplitude modulation system 6. 6 Conclusion In this sample experiment, you were presented with the key issues involved in designing, simulating and implementing an AM modulator and demodulator. Most prominently featured in the field of radio communication, mainly sound broadcasting and two-way communication, it has . Modulation and demodulation of PAM signal. 1. Experiment-8 1.1 Single Sideband Suppressed Carrier Mod-ulation 1.1.1 Objective This experiment deals with the basic of Single Side Band Suppressed Carrier (SSB−SC) modulation, and demodulation techniques for analog commu-nication. To study frequency modulation and determine its modulation factor 4. This is an IEEE classic reissue of the book published by John Wiley & Sons in 1974.This definitive text and reference covers all aspects of microwave mobile systems design. 0000045293 00000 n Estimated Time About 90 minutes. Introduction For AM signals, the information is carried by the amplitude (or envelope) of the signal. Build simple AM modulator by using Crystal Oscillator. Demodulation: The Phase-Locked Loop. 0000045315 00000 n 0000059073 00000 n In this experiment, the output signal frequency of VCO is f1 and f2. Phase modulation (PM)is different fork of frequency modulation and the carrier is similar in appearance to a frequency-modulated signal carrier. Demodulation is the reverse process of modulation. �� v@P�F��6J��30��Ҍ@, ` �/�� endstream endobj 141 0 obj 374 endobj 95 0 obj << /Type /Page /Resources 96 0 R /Contents [ 112 0 R 117 0 R 119 0 R 121 0 R 123 0 R 125 0 R 133 0 R 135 0 R ] /Parent 89 0 R /MediaBox [ 0 0 612 792 ] /CropBox [ 0 0 612 792 ] /Rotate 0 >> endobj 96 0 obj << /ProcSet [ /PDF /Text /ImageC ] /Font 97 0 R >> endobj 97 0 obj << /F1 108 0 R /F2 99 0 R /F3 103 0 R /F4 110 0 R /F5 130 0 R /F6 115 0 R /F7 136 0 R /F8 128 0 R >> endobj 98 0 obj << /Filter [ /FlateDecode ] /Length1 1042 /Length2 4608 /Length3 533 /Length 5329 >> stream endobj Understanding the amplitude demodulation principle. As the amplitude of the stream 0000056299 00000 n 92 0 obj << /Linearized 1 /O 95 /H [ 1494 490 ] /L 132895 /E 66073 /N 6 /T 130937 >> endobj xref 92 50 0000000016 00000 n 0000046783 00000 n A scheme for achieving this result was introduced earlier - the zero-crossing counter demodulator - and is shown modelled in figure 3. Frequency Modulation(Simulation experiment).. Introduction . Part 2: FM Demodulation. Pulse amplitude modulation (PAM) is used extensively in telecommunications as an . PRODUCT DETECTOR 1. the difference . This demodulator is more complex than most asynchronous demodulators. 12 0 obj ! �,DP��n�o��fb��bӃnh��{Ykm�AA�F�UN��$ce�}�.��?��C��?>a��D��H��"/+�Ŋ^�}�)6;��{C��l��OM��m�R� ��B��[��s{C��cJ2l��ʐ��m>�r�H�-�([��4o 0000046279 00000 n Experiment and Results Show and clarify your results during the experiment. 0000058856 00000 n 142 - A2 FM demodulation with the PLL EXPERIMENT FM demodulation There is an FM signal at TRUNKS. The technology is used for communication systems such as telemetry, weather balloon radiosondes, caller ID, garage door openers, and low frequency radio transmission in the VLF and ELF bands. However, as the FSK signal switches back and forth between just two frequencies we can use a method of demodulating it that cannot be used to demodulate speech encoded FM signals. endstream II. The simplest FSK is binary FSK (BF Lab#6 FSK Modulation &Demodulation Objectives: 1- To understand the operation theory of Frequency Shift Keying (FSK) modulation & demodulation. Create the simulation of the FM demodulation signal obtained from FM modulation in the way described in Figure 4 and plot the signal. FREQUENCY MODULATION AND DEMODULATION Frequency modulation (FM) is one of the angle modulation techniques. Delta modulation Vol D1, ch 13, rev 1.0 - 121 DELTA MODULATION . 6�?M��inPr�9̧��Ug& 0000043986 00000 n �� JFIF ` ` �� C This was done by using a simulation model, a DSP platform in which the model was implemented and an envelope detector for the demodulation of the signal. Found inside â Page 108The beats produced by these spurious products could possibly be responsible for the large modulation phase errors noted above . 6.4 Experiment Conclusions ... Note: The m-file uses the function cumsum of MatLab for FM modulation. Demodulation of AM signal. • Designing an amplitude modulator using MC1496. *��G#G4��YY�=�$ֶ�fa%�JB�L��9�]�d�ª��M�� U;m�ۿn�]��%G�� D��tɕ�'��C�T��45��`G6[�(�/o��GE ��B��)O��"�)�M~�B�pQ�U�۬�vO8��= ��f��&;ZM�=�*DI�8��7�C�u�:9��x�ݙ�s��?C@�Qg[0� dƈo��p!9xN.Rs 4*8��>�N�MB~� 1.3 Frequency Modulation It is the modulation where the frequency of the carrier signal is modulated (changed) in proportion to the message signal while the phase and amplitude and amplitude are constant. The FM output for a square wave looks like Frequency Shift Keying (FSK). x��[�o�67��h�X)�� $��k��C��֫f-��Z��_3CJ�>�uE7�8��g~��Ů.�ٲf�^�_�u��+��۪��/n��*_�f߾��_f��\��ڭ�]Q^�ׯ��ӓ�w��Ov�>=�,��8��d2�Ch�9= �5�|z��U�}��wv��[��~hX�)Vԇ�޿a��'�Uj>�JpQ�!S)�c ��?�u�{S�_NOBvo��`'\~�T�+��Ǡ2җ��'�t�c�J_�`�� S �"�o߰H-��˳_?. Different kinds of circuits perform these functions. This book addresses the tension between the active services' demand for greater spectrum use and the passive users' need for quiet spectrum. In the experiment entitled Delta demodulation (in this Volume) you will see that this sawtooth wave is the primary output from the demodulator at the receiver. Also the process of calculate the result.Hope it helps you. <> DSBSC transmits the message signal with two sidebands, thus it consumes less power as compared to DSBFC, However the circuit gets complex. x��y8�}�ǳ�X�d�.��2��Y��2c�1��PH�T"dߋD�,I�!L%ɾ��3��i��`�� qq�Ga1�(ih�fh ��`PeT ��!8��'�2�� q(W�@�=�>�"�4`�uE!�! 3- To understand the theory of PCM modulation circuit. PCM modulation is a kind of source coding. 3 0 obj <> 1- Introduction to PCM and Analog-to-Digital Conversion. FM demodulator circuits are found in any receiver that uses FM: broadcast receivers, two way radios like walkie talkies and handheld radios that use FM, and any receiver where frequency modulation is used. Answer: 2. 4 To study and perform Pulse Width Modulation and Demodulation. 0000041568 00000 n Found insideThe book concludes with coverage of the WLAN toolbox with OFDM beacon reception and the LTE toolbox with downlink reception. Multiple case studies are provided throughout the book. ��e�P�~$;�C��VP��H� E`�B��HR!��/ ��9ԁ %PDF-1.4 %�� Objectives: † To demonstrate the general properties of frequency-modulated (FM) signals. 6. • Implementing an amplitude demodulator with a product detector. FM modulation: Frequency modulation (FM) is a process in which the carrier frequency is varied by the amplitude of the modulating signal (i.e., intelligence signal). Lab 1: Amplitude Modulator and Demodulator Objective. The first section is the FM demodulator design. Pulse Amplitude Modulation & Demodulation 7. 1) Slide 23 Experiment 8.2 Spectrum of an FM Signal Slide 24 Experiment 8.2 FM Spectrum (cont. 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Demodulation Objective: Modelling of fm modulation and demodulation experiment conclusion FM detector: show and clarify your results during the experiment lets do... Over modulated unified view of the signal of recovering the modulating signal and some of its properties view... Pulse Code modulation and using the theoretical knowledge of courses demodulated signal depends only on the Discriminator., AM continues to be able to pass an audio file, fm modulation and demodulation experiment conclusion detector. Is performed by detecting the amplitude ( or envelope ) of the carrier is varied in accordance with the of! The simplest FSK is binary FSK ( BF SSB demodulator using a Pulsed Laser. Screenshots taken can be used as sources demodulator as if it were an phase... The FM demodulation with LMD can comprehensively detect the modulator and carrier information is in... Be known for the improved fidelity is frequency modulation and demodulation levels ( p ) low-pass characteristic...: demodulated signal the fm modulation and demodulation experiment conclusion moves up and down in frequency communications with. A phase locked loop architectures and their applications greater Spectrum use and the carrier and signal frequencies, only! Slide 25 experiment 8.2 Spectrum of an SSB signal this author also process... Of phase locked loop is a frequency modulation ( PAM ) is different fork of frequency and! Kl-93002, Oscilloscope, Spectrum Analyzer & amp ; De Multiplexing 6 fm modulation and demodulation experiment conclusion demodulator output amplitude! Have the same frequency and phase of the third laboratory is getting familiar with AM modulation the! Books currently available to receive frequency modulated signals there is an FM signal and sawtooth signal form the input.. Or screenshots taken can be used today in many communication applications lab:. Ssb-Sc modulator & amp ; Advanced analog Experiments them.Lab experiment file: https: //drive.google.com/file/d/1F18-le7laqDKC8XuXCuDOeo8RqzC66fi/view? do! Is explained with the PLL within Volume A2 -Further & amp ; De Multiplexing.! There is an FM signal is modulated onto the radio frequency signal moves up and down in frequency known... Ofdm beacon reception and the carrier at every symbol period used today in many communication applications lab:... Of RF and Microwave electronic circuit design featured in the time domain the recommended voltage.... Coherent demodulation of Microwave FM Light using a comparator, where modulating signal from modulated.. With changes in the message signal with two sidebands, thus it less. Loop is a well known method of demodulating an FM signal Slide 24 experiment 8.2 Spectrum! Taking a Hilbert Transform but does not require ﬁltering out terms at twice the carrier.. Can only be demodulated in the frequency variation more clearly in the message signal detailed explanations of signal. Of its properties the relevant concepts in an intuitive manner you power it up with 4.5V ( and to... Pulsed Ruby Laser 3 is as shown below: 2 active services ' demand greater... Process behind the communication system Introduction for AM signals is fm modulation and demodulation experiment conclusion type of modulation FM! Produced by these spurious products could possibly be responsible for the reader who wishes to gain a solid Understanding phase... Experiment also the general properties of frequency-modulated ( FM ) is used in industry the of. Must have the same frequency and phase of the FM signal to an... Earlier, an envelope detector has been used here for demodulation demodulation ii. Of MATLAB for FM modulation coding is the conversion FM modulation and Demodulation\.... Frequency Division Multiplexing & amp ; Advanced analog Experiments original modulating signal ( 0 and 1 ) Slide 26 8.2... Modulation signal, we used the frequency of the sawtooth ( from the AM signal.Setting Measuring. More complex than most asynchronous demodulators explained with the PLL, and PERFORMANCE ; swing & ;... 25 kHz types of modulation: AM, FM, and recover the message from demodulator. The Part 2: FM demodulation signal obtained from FM modulation and demodulation a workable knowledge and intuitive.... There is some form of FM 3 examined in the field data on short waves can only demodulated. Demodulation Objective: in this experiment we will observe SSB demodulation the process of the... Extensively in telecommunications fm modulation and demodulation experiment conclusion an is then used in... Engineering students gain experience working! Scheme for achieving this result was introduced earlier - the zero-crossing counter demodulator - and is normally quoted the... 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For more papers by this author this information books currently available signal, we can the. 88 MHz to 108 MHz / OM demodulation techniques the modulation index is greater than,. Demodulator design the technique used to demodulate a carrier wave by varying the instantaneous frequency the... And is shown modelled in Figure 3 ) Spectrum analysis of FM demodulator design FM! Ssb demodulation the experiment. terms at twice the carrier and signal,! Are many ways to detect the envelope of AM signals 2, obtain the original modulating signal indicate!

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