To understand what this course is about, please first have a look at my book.

While the mathematics in the text is simple, I was looking for a way to explain the fundamental concepts of DSP and Software Defined Radio (SDR) without using any mathematics. Consequently, this course is a summary of main ideas in relation to wireless communication systems from an SDR perspective.

Emphasizing on the most valuable stuff is crucial to learning any field. This is the key to rapid skill acquisition where we can go from 0.00 to 0.75 in a reasonably quick time. To understand this further, consider the following series.

\frac{1}{2} + \frac{1}{4} + \frac{1}{8} + \frac{1}{16} + \cdots = 1
Now let us draw this series in a diagram.

An infinite series converting to 1

I want to bring your attention to the following points.

  1. The same concept is much easier to understand from the above diagram as compared to the equation. While a mathematician would rightly argue that this is not a rigorous proof, it serves our purpose well.
  2. Even though 1/2 + 1/4, the shaded part in the diagram, does not become 1, it covers a substantial part of the whole. Similarly, from watching these videos and doing the exercises, you will gain an expert working knowledge of the subject that can be acquired in a reasonable time.
Where exactly do I help the viewer?

In old days, the information was scarce and we needed to learn everything, regardless of where it was coming from. In the past few decades, particularly with the rise of wireless connectivity and Internet, we have far more information than we can handle and the target should be to save our time and energy by separating the important from the unimportant. This is where I help the viewer.

In the light of the above, this course is more suited to the following audiences.

  • Professionals working in telecommunication industry who want to understand what exactly goes on in the physical (PHY) layer of a wireless network. More importantly, you will become able to visualize the world of signals that lies underneath the seemingly simple process of bits sent and bits received.
  • Any radio hobbyists or general technical persons who want to expand their knowledge outside their areas of specialities.

10-Chapter eBook (PDF, 828 pages)
Video Lessons (4+ hours) Video Lessons (4+ hours)
Original Slides Original Slides



Frequently Asked Questions


Q. Is it a guide to build an SDR?

A. Yes and no. The focus is not on RF electronics but instead on the DSP part. Using concepts from time and frequency domains as well as mathematics, you will come to know how to produce IQ samples on the Tx side that are fed into the SDR hardware. On the Rx side, once the RF signal is converted into IQ samples through SDR hardware, you will understand the physical layer (PHY) algorithms leading to the detection of bits.

Q. Are there any free videos to watch?

A. Yes. Have a look at the course contents and you will find some videos accessible for a preview.

There are 26 letters in English language and countless rules. The language of signal processing is simpler.
- It has only 1 letter: a sample at time 0. From there, we can build any discrete-time signal on which our 1s and 0s can be mapped.
- It has one major rule which is repeatedly employed for demapping the received signal to bits.

Wireless Communications from the Ground Up - An SDR Perspective