messages are converted into analog signals that can be sent through the channel. Section 1.1 introduces both encoding and modulation to characterize such conversion of messages into analog signals by a transmitter. Encoding is the process of converting the messages from their innate form (typically bits) into vectors of real numbers that represent the messages. Modulation is a procedure for converting the encoder-output real-number vectors into analog signals for transmission through a physical
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Vaal University of Technology Faculty of Engineering and Technology Department Electronic Engineering Study / Lecturer guide Digital Communication II EADOM2B index 1 Word of welcome 1 2 Qualification information 2 3 Subject / Module information 3 4 Learning material / Textbook 3 5 Assessment 4 6 How to study 4 7 Time schedule 4 8 Syllabus - Chapter outline‚ Chapter outcomes & due/completion dates 5 1 Word of Welcome The Department of Electronic Engineering welcomes
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MODULATION TECHNIQUES 1.4.1 FREQUENCY SHIFT KEYING (FSK) Frequency shift keying is a frequency modulation in which the digital information is transmitted by discrete changes in frequency of the carrier signal. This technology is used for the communication system such as caller ID and emergency broadcasts [19]. The binary FSK is the simplest FSK. BFSK uses a pair of discrete frequencies to transmit binary information. The 1 and 0 is mentioned as mark frequency and space frequency. The other forms
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additional encoding and decoding circuitry. 3. Define data Signalling Rate. Data signalling rate is defined as the rate measured in terms bits per second(b/s) at which data are transmitted. Data signaling rate Rb=I/Tb Where Tb=bit duration. 4. Define modulation rate. It is defined as the rate at which signal level is changed depending On the nature of the format used to represent the digital data.It is measured in Bauds or symbols per second. 5.Why do we go for Gram-Schmidt Orthogonalization procedure
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AN EFFICIENT ICI CANCELLATION TECHNIQUE FOR OFDM COMMUNICATION SYSTEMS A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Master of Technology In Electronics System and Communication By BRAHMAJI T.A.R.K. Department of Electrical Engineering National Institute of Technology Rourkela 2009 AN EFFICIENT ICI CANCELLATION TECHNIQUE FOR OFDM COMMUNICATION SYSTEMS A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Master of Technology
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time and amplitude which is generally carried by use of modulation. 2. History of Analog Communication – 3. Amplitude Modulation - Amplitude modulation (AM) is a modulation technique used in electronic communication‚ most commonly for transmitting information via a radio carrier wave. AM works by varying the strength (amplitude) of the carrier in proportion to the waveform being sent. 4. Angle Modulation - is a class of analog modulation. These techniques are based on altering the angle (or phase)
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SUBMITTED BY: Nadeem Raza 09-ECT-05 Amir Mehmood 09-ECT-22 Mohammad Shoaib 09-ECT-29 Saad Najaf Khan 09-ECT-38 Date: 15th June‚ 2012 UNIVERSITY OF ENGINEERING AND TECHNOLOGY TAXILA SUB CAMPUS CHAKWAL Introduction: CDMA is modulation technique to transmit data over a whole frequency spectrum. It was developed by Qualcomm as a better technology to TDMA based 2nd Generation GSM. In many aspects‚ such as power‚ security‚ number of users‚ and efficiency‚ it achieved success in displacing
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effects of 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
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Each user having different PN sequences. The User data is scrambled with PN sequences and given as input for Modulator. The 16-PSK (M-ary PSK) Modulation technique is implemented in Modulator. In 16-PSK Modulation‚ only 16 sub carriers are enough to modulate the encrypted data for all users. The Band width efficiency is achieved through 16-PSK Modulation. The data is transmitted through DSSS concept. In receiver module‚ the data is received through demodulator and decoder. BLOCK DIAGRAM: TRANSMITTER
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| | IntroductionThe term “computer network’’ means a collection of autonomous computers interconnected by a single technology. Two computers are said to be interconnected if they are able to exchange information. The connection need not be via a copper wire; fiber optics‚ microwaves‚ infrared‚ and communication satellites can also be used. Networks come in many sizes‚ shapes and forms. Uses of Computer Networks 1. Business Applications 2. Home Applications 3. Mobile Users 4. Social Issues
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