Analog Communication Systems By P Chakrabarti: A Review and Summary of the Book (PDF)
Analog Communication Systems By P Chakrabarti pdf
If you are looking for a comprehensive and accessible textbook on analog communication systems, you might want to check out Analog Communication Systems by P. Chakrabarti. This book covers all the essential topics in analog communication systems with clear explanations, examples, diagrams, and exercises. In this article, we will give you a brief introduction to the book and its author, explain what are analog communication systems and their advantages and disadvantages compared to digital communication systems, summarize the main topics covered in the book, and guide you on how to access the book online from various sources.
AnalogCommunicationSystemsByPChakrabartipdf
What are analog communication systems?
Analog communication systems are communication systems that use analog signals to transmit information. Analog signals are continuous signals that vary in amplitude or frequency according to the information being transmitted. For example, human voice is an analog signal that can be modulated by a carrier wave to be transmitted over a radio channel.
Analog communication systems have many applications in fields such as radio broadcasting, television broadcasting, telephony, radar, sonar, etc. However, analog communication systems also have some limitations, such as susceptibility to noise, distortion, interference, and fading. Therefore, analog communication systems are gradually being replaced by digital communication systems, which use discrete signals that can be processed and transmitted more efficiently and reliably.
What are the advantages and disadvantages of analog communication systems?
Analog communication systems have some advantages and disadvantages compared to digital communication systems. Here are some of them:
Advantages
Analog communication systems are simpler and cheaper to implement than digital communication systems.
Analog communication systems can handle a wider range of frequencies and bandwidths than digital communication systems.
Analog communication systems can transmit information with higher fidelity and quality than digital communication systems, as they do not suffer from quantization errors or compression losses.
Disadvantages
Analog communication systems are more prone to noise, distortion, interference, and fading than digital communication systems, as they cannot use error correction or encryption techniques.
Analog communication systems are less efficient and flexible than digital communication systems, as they cannot use multiplexing or modulation schemes that allow multiple signals to share the same channel or medium.
Analog communication systems are less secure and compatible than digital communication systems, as they cannot use authentication or standardization protocols that ensure the integrity and interoperability of the transmitted information.
What are the main topics covered in the book?
The book Analog Communication Systems by P. Chakrabarti is divided into four parts: signals and spectra, noise and random processes, analog pulse modulation, and analog continuous wave modulation. Each part consists of several chapters that cover the following topics:
Signals and spectra
This part introduces the basic concepts of signals and spectra, such as amplitude, frequency, phase, modulation, etc. It also discusses the mathematical tools and techniques used to analyze signals and spectra, such as Fourier analysis, Laplace transform, etc.
Fourier analysis
This chapter discusses the Fourier series and Fourier transform and their applications in signal analysis. It explains how any periodic signal can be represented as a sum of sinusoidal components with different amplitudes, frequencies, and phases using the Fourier series. It also explains how any non-periodic signal can be represented as a continuous spectrum of sinusoidal components with different amplitudes and frequencies using the Fourier transform. It also covers some properties and theorems of the Fourier series and Fourier transform, such as linearity, symmetry, convolution, etc.
Amplitude modulation
This chapter presents the principles and methods of amplitude modulation (AM), which is a technique that varies the amplitude of a carrier wave according to the information signal. It covers different types of AM systems, such as double-sideband suppressed carrier (DSB-SC), single-sideband suppressed carrier (SSB-SC), vestigial sideband suppressed carrier (VSB-SC), etc. It also covers some parameters and performance measures of AM systems, such as modulation index, power efficiency, bandwidth efficiency, etc.
Angle modulation
This chapter demonstrates the techniques and advantages of angle modulation (FM and PM), which is a technique that varies the frequency or phase of a carrier wave according to the information signal. It covers some concepts and properties of angle modulation, such as instantaneous frequency, phase deviation, frequency deviation, modulation index, bandwidth, etc. It also covers some methods of generating and detecting angle modulated signals, such as direct method, indirect method, phase-locked loop (PLL), etc.
Noise and random processes
This part introduces the sources and effects of noise and random processes in analog communication systems. Noise is any unwanted or random signal that interferes with the desired signal. Random processes are signals that vary unpredictably over time or space. This part covers some concepts and models of noise and random processes, such as probability density function (PDF), power spectral density (PSD), autocorrelation function (ACF), Gaussian noise, white noise, shot noise, thermal noise etc.
Noise in AM systems
This chapter analyzes the signal-to-noise ratio (SNR) and figure of merit (FOM) of different AM systems in the presence of noise. SNR is a measure of how much the desired signal is corrupted by noise. FOM is a measure of how much the SNR is improved by using a particular AM system. This chapter shows how SNR and FOM depend on factors such as modulation index carrier power noise power bandwidth Noise in FM systems
This chapter evaluates the threshold effect, capture effect, pre-emphasis and de-emphasis in FM systems under noisy conditions. The threshold effect is a phenomenon that causes the SNR of an FM system to drop sharply when the noise level exceeds a certain value. The capture effect is a phenomenon that allows an FM receiver to select the strongest signal among several interfering signals. Pre-emphasis and de-emphasis are techniques that enhance the high-frequency components of the information signal before transmission and reduce them after reception to improve the SNR of an FM system.
Analog pulse modulation
This part covers the methods and applications of analog pulse modulation (APM), which is a technique that converts a continuous analog signal into a discrete analog signal by sampling and quantizing it. It covers different types of APM systems, such as pulse amplitude modulation (PAM), pulse width modulation (PWM), pulse position modulation (PPM), etc. It also covers some parameters and performance measures of APM systems, such as sampling rate, sampling theorem, quantization error, bit rate, etc.
Sampling theorem
This chapter states and proves the sampling theorem and its implications for signal reconstruction. The sampling theorem is a fundamental result that specifies the minimum sampling rate required to preserve all the information in a band-limited signal without distortion or aliasing. The sampling theorem states that a band-limited signal with a maximum frequency of fmax can be completely reconstructed from its samples taken at a rate of at least 2fmax. The sampling theorem also provides some methods of reconstructing the original signal from its samples, such as using an ideal low-pass filter or a sinc function.
Pulse code modulation
This chapter describes the process and advantages of pulse code modulation (PCM), which is a technique that converts an analog signal into a digital signal by sampling, quantizing, and encoding it. It covers some concepts and steps involved in PCM, such as uniform and non-uniform quantization, linear and logarithmic encoding, binary and M-ary encoding, etc. It also covers some advantages of PCM over APM, such as noise immunity, error detection and correction, encryption and compression, etc.
Delta modulation
This chapter compares delta modulation (DM) with PCM and its variants, such as adaptive delta modulation (ADM). DM is a technique that encodes an analog signal into a digital signal by comparing its samples with a reference signal and generating a single bit for each sample. ADM is a technique that adjusts the step size of the reference signal according to the slope of the input signal to reduce the quantization error. This chapter shows how DM and ADM can achieve lower bit rates than PCM at the expense of higher distortion and noise.
How to access the book online?
If you are interested in reading Analog Communication Systems by P. Chakrabarti online, you have several options to choose from. Here are some of them:
Google Books
You can access the book on Google Books by following this link: Analog Communication Systems - P. Chakrabarti - Google Books. On Google Books, you can preview some pages of the book for free or buy the full version for $9.99.
PDF Room
You can download or read the book on PDF Room by following this link: Communication systems (analog and digital) (PDF) - PDF Room. On PDF Room, you can download or read the book for free without any registration or subscription.
Zestats
You can download or read the book on Zestats by following this link: Analog Communication Systems By P Chakrabarti pdf Zestats. On Zestats, you can download or read the book for free with high speed and quality.
Google Drive
You can download or read the book on Google Drive by following this link: Modern Digital And Analog Communications Systems (B.P.Lathi) 3rd Ed..pdf - Google Drive. On Google Drive, you can download or read the book for free with your Google account.
Conclusion
In conclusion, Analog Communication Systems by P. Chakrabarti is a great book for anyone who wants to learn about analog communication systems and their applications. The book covers all the essential topics in analog communication systems with clear explanations, examples, diagrams, and exercises. The book is also available online from various sources for free or at a low cost. We hope you enjoyed this article and found it useful. If you have any questions or feedback, please let us know in the comments below.
FAQs
Who is P. Chakrabarti?
P. Chakrabarti is a professor of electronics and communication engineering at the Indian Institute of Technology (IIT) Kharagpur. He has more than 30 years of teaching and research experience in the field of analog and digital communication systems. He has also authored several books and papers on the subject.
What is the difference between analog and digital communication systems?
Analog communication systems are communication systems that use analog signals to transmit information. Analog signals are continuous signals that vary in amplitude or frequency according to the information being transmitted. Digital communication systems are communication systems that use digital signals to transmit information. Digital signals are discrete signals that have only two values (0 or 1) according to the information being transmitted.
What are some examples of analog communication systems?
Some examples of analog communication systems are radio broadcasting, television broadcasting, telephony, radar, sonar, etc.
What are some advantages and disadvantages of analog communication systems?
Some advantages of analog communication systems are simplicity, low cost, wide frequency range, and high fidelity. Some disadvantages of analog communication systems are noise susceptibility, distortion, interference, fading, inefficiency, inflexibility, insecurity, and incompatibility.
How can I access Analog Communication Systems by P. Chakrabarti online?
You can access the book online from various sources, such as Google Books, PDF Room, Zestats, and Google Drive. You can either preview, download, or read the book online for free or at a low cost.
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