Principles Of Communications

Principles Of Communications

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IntroductionBlock diagram of electrical communication system, Radio communication, Types of communication, Analog, pulse and digital, Types of signals, Fourier Transform for various signals, Fourier spectrum, Power spectral density, Autocorrelation, Correlation, Convolution.Amplitude ModulationNeed for modulation, Types of amplitude modulation, AM, DSB SC, SSB SC, Power and BW requirements, Generation of AM, DSB SC, SSB SC, Demodulation of AM, Diode detector, Product demodulation for DSB SC and SSB SC.Angle ModulationFrequency and phase modulations, Advantages of FM over AM, Bandwidth consideration, Narrow band and wide band FM, Comparison of FM and PM.Pulse ModulationsSampling, Nyquist rate of sampling, Sampling theorem for band limited signals, PAM, regeneration of base band signal, PWM and PPM, Time division multiplexing, Frequency division multiplexing, Asynchronous multiplexing.Digital CommunicationAdvantages, Block diagram of PCM, Quantization, Effect of quantization, Quantization error, Base band digital signal, DM, ADM, ADPCM and comparison.Digital ModulationASK, FSK, PSK, DPSK, QPSK demodulation, Coherent and incoherent reception, Modems.Information TheoryConcept of information, Rate of information and entropy, Source coding for optimum rate of information, Coding efficiency, Shannon Fano and Huffman coding.Error Control CodingIntroduction, Error detection and correction codes, Block codes, Convolution codes.5.6.2 Principle of DPCM If this redundancy is reduced, then overall bit rate will decrease and number of bits required to transmit one sample will also be reduced. This type of digital pulse modulation scheme is called Differential Pulse Codeanbsp;...

Title:Principles Of Communications
Publisher:Technical Publications - 2008-01-01


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