Pre-requisites Sampling theorem – baseband sampling How to Interpret FFT results – complex DFT, frequency bins and FFTShift Analytic signal, Hilbert Transform and FFT Introduction The concept of instantaneous amplitude/phase/frequency…

# Category: Signal Processing

Pre-requisites Sampling theorem – baseband sampling How to Interpret FFT results – complex DFT, frequency bins and FFTShift Introduction Fourier Transform of a real-valued signal is complex-symmetric. It implies that…

“What is the best filter that I should use?” is often the question asked by many. There exists two different types of Linear Time Invariant (LTI) filters from transfer function standpoint…

Read More Choosing a filter – FIR or IIR – Understanding the design perspective

Tapped-delay line filters (basically FIR filters) are best to simulate multiple echoes originating from same source. Hence they can be used to model multipath scenarios. Choose frequency-flat or frequency selective: If the…

Read More Modeling a Frequency Selective Multipath Fading channel using TDL filters

This tutorial is a part of the website http://www.gaussianwaves.com and created under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. You must credit the author in your work if you remix, tweak,…

Read More OFDM and Cyclic Prefix – a handson demonstration using Matlab

In the previous post, Interpretation of frequency bins, frequency axis arrangement (fftshift/ifftshift) for complex DFT were discussed. In this post, I intend to show you how to obtain magnitude and…

Read More How to interpret FFT results – obtaining magnitude and phase information

Four types of Fourier Transforms: Often, one is confronted with the problem of converting a time domain signal to frequency domain and vice-versa. Fourier Transform is an excellent tool to…

Read More How to Interpret FFT results – complex DFT, frequency bins and FFTShift

Root Mean Square (RMS) value is the most important parameter that signifies the \(size \; of \; a \;signal\). Defining the term “size”: In signal processing, a signal is viewed…

We live in the age of smart phones that can be loaded with numerous applications to communicate with each other. What’s next ? Where do we go from here ?…

This article is also available in PDF format – Free Download here. Looking for the proper way to generate AWGN noise in Matlab/Octave ? Here you go… AWGN – the…

Read More How to generate AWGN noise in Matlab/Octave (without using in-built awgn function)

Leave a Comment