Signal Processing Archives - Behind The Sciences

How to record the garage door openers signal

behindthesciences | September 5, 2017

If you want to record your garage door opener signal in order to, for example, see the coded pulses you can do it with a RTL-SDR dongle. If

Signal Processing

How to find the frequency of a signal using the FFT: Matlab Tutorial

behindthesciences | May 14, 2017

In signal processing, most of time we acquire a signal which frequency is unknown. For example, if we are taking EEG from an Emotiv headset, we can be

Signal Processing

FMCW Radar, Backscattering Analysis

behindthesciences | November 22, 2016

Importance FMCW radars main applications are as altimeters, placed in aircraft, but also in the investigation of atmosphere, thanks to the sensitivity and spatial resolution that

Signal Processing

LTI Systems Tutorial

behindthesciences | September 14, 2016

As we did in our previous post, we are going to share with you a tutorial to learn about LTI Systems in the time domain and filtering. Therefore,

Signal Processing

Tutorial: How to create a waveform (.wv) file with Matlab

behindthesciences | September 12, 2016

In this tutorial we are going to see how to create a waveform file by using Matlab and a free software from Rohde & Schwarz. First, have a look

Signal Processing

Doppler radar pulsed signal: Matlab analysis

behindthesciences | August 11, 2016

Doppler Radar System Description The Doppler radar performance makes an optimum use of the transmitted power and its weight is appropriate to be used in aircrafts. In addition,

Signal Processing

Radar Signals: Matlab Tutorial

behindthesciences | July 5, 2016

Comments added thanks to William Buller, from Michigan Technological University In this post we are going to review the main characteristics of radar signals and we are going

Signal Processing

Fourier Transform Matlab Tutorial

behindthesciences | July 5, 2016

Following our last post about the FT Theory, now we will practice in Matlab with code exercises and solutions. The first thing you need to do is to

Signal Processing

Fourier Transform Theory

behindthesciences | July 5, 2016

In this post we are going to see the theory behind the Fourier Transform in an understandable way so you can be ready to practice with our next

Signal Processing

Frequency Modulation (FM) Matlab Tutorial.- Part 1

behindthesciences | July 5, 2016

In this post we are going to review some basic concepts about Frequency Modulation (FM) to set the basis for our next post, which will be a Matlab tutorial,

Signal Processing

Frequency Modulation (FM) Matlab Tutorial.- Part 2

behindthesciences | July 5, 2016

In this post we are going to apply what we learnt about the FM signal’s properties in our last post. We will do some exercises in Matlab by

Signal Processing

Periodic Signals Tutorial

behindthesciences | July 5, 2016

In this post, we are going to see a practical study of periodic signals in Matlab. We are going to post the code and the results here so

Signal Processing

Pulse Amplitude Modulation (PAM) MATLAB Tutorial

behindthesciences | July 5, 2016

If you read our last post then you are ready to easily follow this tutorial in which we are going to study the PAM signals generation and their spectra. Now,

Signal Processing

Analog Pulse Modulations: PAM AND PWM

behindthesciences | July 5, 2016

Communication systems play an important role in all the information transmission systems. Generally, in all the communication systems, the information in the source is processed through a modulator

Signal Processing

ASK and FSK: digital modulations

behindthesciences | July 5, 2016

In our previous posts, we have studied analog modulations such as AM and FM and we introduced PAM and PWM as an intermediate step to achieve digital modulations.