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New look

In coming to this new format, I had to leave behind the board which has over 2000 members. There were quite a lot of people on it and I am sorry that it will not be accessible any more. However,

Posted in DFT

Discrete-time Fourier Series and Fourier Transform

I have posted part 3 of the FFT tutorial at complextoreal.com.It starts with the development of discrete signals, their properties, periodicity of discrete signals, finding a set of basis harmonics and then finally the Discrete-time Fourier Transform. The tutorial also

Posted in Digital Communications

Fourier Made easy part 2 – new version uploaded

I have uploaded a new version of the Fourier Made Easy part 2 tutorial. In this version, I have included more examples as well as Matlab code to plot some of the key pictures.  I get requests to include code,

Posted in DFT, Digital Communications, Fourier Transform Tutorial

Video that explains the complex exponential

While writing the second part of the Fourier tutorial, I came across this video which does a great job of explaining the complex exponential, its relationship to sinusoids and hence to the reason why signal processing math is done with

Posted in DFT, Digital Communications, Fourier Transform Tutorial

Fourier tutorial part 1 – updated

I am going through my old material and am updating it. I have just uploaded FFT Part 1 after changing it in many places. http://complextoreal.com/chapters/fft1.pdf If you have comments on this tutorial (any including typos!), please post them here. Charan

Posted in DFT, Digital Communications, Fourier Transform Tutorial

Thanks to The Mathworks

The Mathworks company has just provided me a complementary copy of Matlab out of their “Author” program. So I want to take this space to thank them. For may of the demonstrations in my tutorials on complextoreal.com and where I

Posted in DFT, Digital Communications, Fourier Transform Tutorial

MIMO at last

I have posted the final (nearly so) version of my MIMO tutorial. www.complextoreal.com It took a while. In the writing of this paper, I relied heavily on a few books and papers. The three books I often found myself thumbing

Posted in MIMO tutorial

MIMO tutorial at last

I have post a completed version of the MIMO tutorial on complextoreal.com.

Posted in MIMO, MIMO tutorial, MIMO tutorial signal processing digital communications, Uncategorized

MIMO Tutorial – Part One

I have posted part one of the MIMO tutorial. The first part is mostly concentrated on the capacity issues. You may think why even worry about capacity; We don’t seem to worry about the capacity of the traditional SISO links.

Posted in MIMO tutorial signal processing digital communications

Writing a section on MIMO

MIMO I have been trying to write a section on MIMO for a while. Wow what a difficult subject this is to tackle. There are so many issues, despite having read nearly every book on the topic, I still can

Posted in fading channels, MIMO, Proakis
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