Author: behindthesciences

Before attempting to understand how 4G and 5G networks are made up, it is important to have a comprehensive understanding of GSM. GSM is an acronym that stands

1. Introduction Energy efficiency is one of the main goals for the next mobile network generation. As we mentioned in previous posts, theeNodeBs are the elements in the

If you want to do a full study of this technique, we would definitely suggest to download and “play” with our Matlab implementation: https://uk.mathworks.com/matlabcentral/fileexchange/55995-cyclic-prefix-in-16qam-system-with-single-path-rayleigh The Cyclic Prefix technique commonly

DSSS is one of the methods widely used in code division multiplexing access (CDMA) systems such as IS-95 standard, or the more recent ones: UMTS and EVDO, all

Nowadays is difficult to imagine our lives without mobile communications. We are replacing the use of desktop computers by mobile phones and tablets that perform the main applications

In previous posts we saw the properties of DSSS signals and the rake receiver implementation for a 16QAM system. We have upload the following files to Mathworks: http://www.mathworks.com/matlabcentral/fileexchange/55810-direct-sequence-spread-spectrum-dsss-for-bpsk-qpsk-and-16qam-modulations BPSK

The typical channels that model the multipath behaviour of the wireless link are either a combination of the exponential channel model, or the Rayleigh channel model, together with AWGN

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

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

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

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,

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

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

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,

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