Improvement for Channels With Multipath Fading (MF) Through the Methodology CBEDE

Improvement for Channels With Multipath Fading (MF) Through the Methodology CBEDE

Reinaldo Padilha França (State University of Campinas (UNICAMP), Brazil), Yuzo Iano (State University of Campinas (UNICAMP), Brazil), Ana Carolina Borges Monteiro (State University of Campinas (UNICAMP), Brazil) and Rangel Arthur (State University of Campinas (UNICAMP), Brazil)
Copyright: © 2020 |Pages: 19
DOI: 10.4018/978-1-7998-1152-7.ch002
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Abstract

The present study aims to implement a discrete event simulation (DES)-based model. This model is called coding of bits for entities by means of discrete events (CBEDE) and aims to improve the transmission of content in wireless telecommunication systems. This is done by applying advanced modulation format DQPSK in a simulation environment, the Simulink of the MATLAB software, through a pre-coding process of bits applying discrete events in the signal before of the modulation process, occurring in the discrete domain with the implementation of discrete entities in the process of bit generation applied at a low level of abstraction in a wireless telecommunication system. The results show improvements of 89.08% in memory utilization, related to information compression, in the context of the research. Therefore, the presented results of the proposed methodology show an enormous potential for the non-orthogonal multiple access (NOMA) contexts, credited as the future 5G, and can compensate for the additional complexity brought by the techniques to the telecommunications channel.
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Mobile Technology

The second generation of telephone technologies is called 2G (Second Generation) and this methodology was based on GSM technology. It is coming into operation around the 90s and allowed, mainly, the exchange of text messages and photos via SMS. Their focus was on voice connection, talk and be heard on the phone without the need to exist an internet connection. Subsequently, around the year 2006, the term 3G was created; and was responsible by the first cell phone technology that was born to bring fast internet to mobile phones. In its first wide-band code-division multiple access (WCDMA) standards, the maximum theoretical speed was 384 Kbits per second. In recent years, very little, but its first network appeared in 2002, where fixed broadband barely reached megabits. Another great bet of the 3G was the video calls through the cellular network, however, the service was not popularized due to the technology of the time (Curwen & Whalley, 2016; Yadav & Singh, 2018).

Technically, 3G works with the transmission of voice data (audios exchanged for mobile apps, for example) and internet services (website navigation, downloads, use of online applications, among others). This methodology was (and still is) very important to democratize Internet access in Brazil. If it is a mobile network, a 3G modem was the salvation for people who lived where there is no fixed broadband presence. It is responsible for popularizing mobile internet access in Brazil. With their development, companies began to commercialize modems that made fixed broadband access feasible for many Brazilians (Campante et al., 2016; Yadav & Singh, 2018).

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