Open AccessMechanism of interchange between the reflections in a channel of communications with the power spectral density
Author(s) -
José Roberto Cárdenas
Publication year - 2017
Publication title -
ingeniería e investigación/ingeniería e investigación
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.204
H-Index - 12
eISSN - 2248-8723
pISSN - 0120-5609
DOI - 10.15446/ing.investig.v37n2.58049
Subject(s) - channel (broadcasting) , bandwidth (computing) , channel capacity , reflection (computer programming) , telecommunications , spectral density , electric power transmission , electronic engineering , power (physics) , transmission (telecommunications) , computer science , electrical engineering , topology (electrical circuits) , physics , engineering , quantum mechanics , programming language
The theoretical limit given by the Shannon Capacity equation has been the origin of communications systems based on the interchange between bandwidth and power. This article explores the interchange between the power spectral density and the reflections that can be generated in a communications channel, with the ultimate aim of being able to decrease the power spectral density for the same capacity. The reflections can be expressed as a number of controlled reflections or by a reflection coefficient. The channels studied show that this exchange is possible. A new model based on feedback circuits was found to represent a transmission line, which was useful to study the MISO channel formed by several transmission lines of different length. A geometric elliptic dispersion model to represent a SISO channel was studied too.