amplitude modulation lecture notes pdf

<< /ProcSet [ /PDF /Text ] /ColorSpace << /Cs1 7 0 R >> /Font << /F2.0 9 0 R C. HAPTER. }�g��i:W��9÷�Og�#��'�+x��R%#Գ�'�؈��x�h�?�Z�� <> <> The "percent modulation" is m x 100. 5��OlP��mi��k�N;��r�r��|�i��(|��X��ye�v�^��K��.N��_$? 5 0 obj • In modulation, one characteristic of a signal (generally a sinusoidal wave) known as the carrier is changed based on the information signal that we wish to transmit (modulating signal). Modulation: Process by which a property or a parameter of a signal is varied in proportion to a second signal. Amplitude modulation of signals 2. endobj and. 52 - A1 Amplitude modulation As an example of an AM signal derived from speech, Figure 5 shows a snap-shot of an AM signal, and separately the speech signal. Since c = 2 f c, frequency = f c Hz where f c = 1/T. 3 Carrier signals are used for two reasons: (1) To reduce the wavelength for efficient transmission and stream EC8491 Communication Theory Lecture Notes, Books, Study Materials, Question Papers, Syllabus Part-A 2 marks with answers EC8491 Communication Theory Subjects Important Part-B 16 marks Questions, PDF Books, Question Bank with answers Key And MCQ Question & Answer, Unit Wise Important Question And Answers, One Mark Question With Answers, Choose The Best Answer. View Lecture 3 - Amplitude modulation.pdf from ELEN 3024 at Witwatersrand. ... 8.5 M-ary Pulse Amplitude Modulation M-ary AMP is used to transmit bits per symbol. 4 0 obj Basic Concept of Modulation The information source Typically a low frequency signal Referred to as the “baseband signal” Carrier A higher frequency sinusoid Example: cos(2π10000t) Modulated Signal Some parameter of the carrier (amplitude, frequency, phase) is varied in accordance with the baseband signal "��7XO��'�JTW��G�R • Pulse amplitude modulation (PAM), pulse shaping, and the Nyquist criterion • Quadrature amplitude modulation (QAM), and the equivalent complex baseband representation • Symbol mapping and constellation set This lecture introduces the principle of digital modulation, which serves as the bridge between the cyber world and the physical world. )��i��E[9t{Xl�m�:�x7(��$�k�.�4�4��3o�R�G�H��Y�;��"uumׁvo�5��/��m#�>��\o�� V��͖��֑�� B��vE5U��{�"\�� T�d$�`�K�U�Zѯ��`)e�1e�i��6�,��c�S��K��k��6��8dBª��6�f�� 14. 16.002 Lecture (8) Communication Systems Amplitude Modulation (AM) April 9, 2008 Today’s Topics 1. The demonstration centers around a number of signals displayed in both the time domain and the frequency domain using a … We will consider each of these in turn. Application of Amplitude modulation… The three types of modulation we will focus on are: 2.1 Amplitude modulation (AM) Varying the amplitude V c of the carrier with the info signal. 6 0 obj {x�O��$��̥߬S]�%��֧��&7��g̞>r=��g8`候� For simplicity, consider a cosine wave information signal, v m (t) (a 440 Hz tuning fork) and a cosine carrier, v c (t) (frequency 5000 Hz (or 5 kHz)). • PAM- Pulse Amplitude Modulation: – The pulse may take any real voltage value that is proportional to the value of the original waveform. Noise in AM System 6. • That could be the amplitude, phase, or frequency, which result in Amplitude modulation (AM), Phase modulation (PM), or Frequency modulation (FM). Amplitude Modulation In this lecture, we demonstrate many of the concepts and properties dis-cussed and developed in several of the previous lectures. 10 0 obj 8rʶ��d�WT'��eL�~.u"A��=9�뗚]��>31�3��X3��-$e�}��u,��gm�g�6�64$ы��EzL*LZ�_�j��_��]�X��y�[�?�Xs ��N��/��]��|m��sϚƫk_Wf��ȸA�2��)�o��z-di��2�|m٣��j|5ԥej�8�ɮe�E��7��[��Q�|�IM%ײ�xf)�|6\ k��`Ҳ��䍐. Winter 2003 UW, ECE 318 Lecture Notes 7 Amplitude Modulation (AM) (Ch. Lecture Notes Chapter 3 Amplitude Modulation Speech, music, some images and video are examples of analog signals Analog source: Intensit,y bandwidth, dynamic range and nature of the signal Black and white TV: Intensity Color TV: Intensit,y Red, Green, Blue (and also the audio component) Bandwidth: elTephone signal: 4kHz, Music: 20kHz, TV: 6MHz *B7_��̜`�cT��b��;^i弉��Zi>B�^��Z�ޖ��>�}��U^�m�~qd Up�ô� D�]�0��/͖_=��O=i��b}�[!��ѹX��B��WE �{�NԑBw��FYל��E�4� %hu�\ٽY_��AY�7�x��l�q�G�sg��$Q��ɟ��x{�?��1��d�>/k��H�,��,v&Y��tV!�hbT0��AM�#�E~��9S䳍��m�;��X?뤗u�P!��L ��ǡ�$(c�-:�C#�\(vY9� X]4��G�E��9L��2��I灣v�WVEk��y��D6v�� Ϧ3�3� �e� G]JG1��`V(��/ߴ��3ZS��$�e�ʓ�~��C ��.d��}Z3��M=ވ��X�4��ip�xG��$�+�:z��m��&��==�v�s*!m�ZG�/g(�b]�E�MB~&_��U6Ys ��py��'�c��I��TW��j�� 8��P�~n%$c㪱\�s�Mbټ��v ��F��Z&�X��RB�#C�} �SvXe8�ug8��Zr:6�=��h-6��b#gۜ7�xl��G�"�a�s��\��5��rǱ�'��W��??��V�cJ�qʷ! The ﬁrst modulation considered is binary phase shift keying. LECTURE NOTES ON ANALOG COMMUNICATIONS (17CA04402) IV Semester Dr. P. Krishna Murthy Assistant Professor ELECTRONICS & COMMUNICATION ENGINEERING CHADALAWADA RAMANAMMA ENGINEERING COLLEGE (Autonomous) Tirupati – 517 502, Andhra Pradesh. 32. Fd�F%f�Ԍ�� y��&I�%��;��%�6M�͐j��E�I�J �>�Ǧ��p��/*��jX^W�9Mo��}?� ��>��B��m��N��!H��a��;�� I�cm2w��*ϣ}u�egZ. << /Length 5 0 R /Filter /FlateDecode >> Apr 24, 2021 - Chapter - Amplitude Modulation and Demodulation, PPT, ADC, Semester, Engineering Computer Science Engineering (CSE) Notes | EduRev is made by best teachers of Computer Science Engineering (CSE). Chapter 5 Amplitude Modulation AM was the ﬁrst widespread technique used in commercial radio broadcasting. 5) Add all the symbols together (number of symbols depends on M which depends on group of bits). >> of a high-frequency sine wave (called a . Double Sideband Suppressed Carrier Modulation. MIT 6.02 DRAFT Lecture Notes Last update: November 3, 2012. modulation. Amplitude Modulation Techniques 3. 6 0 obj Amplitude Modulation: The amplitude of a sinusoidal signal with ﬁxed frequency and phase is varied in proportion to a given signal. amplitude. 2.2 Frequency modulation (FM) Varying the frequency f c of the carrier with the info signal. Notes of Principles of Communication Systems | lecture notes, notes, PDF free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material ... Introduction To Amplitude Modulation. Single Sideband And Vestigial Sideband Method Of Modulation. Used to transmit data over a commu nication link, which we achieve by mapping the transmit per. Signal is used to transmit data over a commu nication link, we! 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