Wireless Communications From the Ground Up


Volume 1 – Fundamentals of Digital Communication Systems

Wireless Communications - From the Ground Up - Fundamentals of Digital Communication Systems

The book starts with a completely fresh perspective on introduction to signals and continues to dealing with complex numbers without any complicated mathematics. The only skills you require are addition, multiplication and knowing what cos and sin are! The topics of discrete domains – both time and frequency – are explained in an intuitive manner such that traveling between the two through Discrete Fourier Transform (DFT) becomes quite natural.

Furthermore, the concepts needed to implement modern digital communication systems such as convolution, filters and multirate signal processing are illustrated through the help of beautiful figures. Next, the book demystifies modulation and demodulation in a way easy to grasp even for a non-technical reader. The focus is on linear modulations, particularly Pulse Amplitude Modulation (PAM), Quadrature Amplitude Modulation (QAM) and Phase Shift Keying (PSK). Matched filtering is clarified in time, frequency and mathematical details in a story-like development. In addition, the topic of pulse shape filtering is covered in a depth and from angles never described anywhere before. The book continues with stethoscopes of a communication system, namely eye diagrams and scatter plots and towards the error rates of various modulation schemes along with the energy scaling factors of respective blocks. Finally, their spectral efficiencies are described taking into account the bandwidth, signal-to-noise ratio and data rates.

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Product Details

eBook: 277 pages, Paperback 7″x10″: 246 pages
Publisher: CreateSpace Independent Publishing Platform; 1 edition (October 30, 2016)
Language: English
ISBN-10: 1539774589
ISBN-13: 978-1539774587

——–The mainstream textbooks on this topic are filled with heavy mathematical details. That makes the field of wireless communication an exclusive membership club for those who can understand

  • Several types of frequency variables and their corresponding Fourier transforms as well as different types of Fourier series, not to mention numerous connections among all of them
  • Probability and random processes
  • Detection and estimation theories

and so on.

In my opinion, understanding wireless systems can be made simpler than that. Here, you can bypass the mathematical rigor that creates difficulty for non-specialists. This text is a simple way for you to enter at the beginner level and make your way up to the wireless system design. Mathematics is included at a school level. I rely more on visualizing equations through beautiful figures. Therefore, you will encounter numerous figures throughout the text with logical and intuitive explanations. But you will NOT encounter any integrals, probability theory and detection/estimation theory. You will NOT even find any e or j of complex numbers either. The most complicated notation I have used is \sum _{n=N1} ^{N2} which basically means “sum everything from N1 to N2.

——–A methodology I have adopted to explain various concepts is what I call a “3D” approach — time, frequency and mathematics. Some people can visualize the concepts in time domain quite well, others can do the same in frequency domain, while many find the comfort in simple mathematical derivations. It is those who can do all three are the most successful ones!

In this book, most figures are marked with time and frequency domain markers. The same holds for a mathematical derivation. That helps in quickly connecting the concepts from multiple angles.


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