Multiple Input Multiple Output System with Multi User Support Based on Directive Information Transmission

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Low interference and privacy are crucial requirements for system reliability and se- curity. Present and further mobile communication systems must support multiple users achieving at same time low interference levels. Several solutions can be adopted to reduce interference be- tween users, such as spreading codes or beam forming. For very high bit rates first solution must be discarded. On the other hand, in environments with a very high number of users beamforming can impose demanding hardware requirements in mobile devices, which is undesirable. Transmit- ters with directivity introduced at information level where the transmitted constellation is only optimized in the desired direction can also be used to assure low interference. Under this ap- proach, power efficiency on amplification can be also improved, due to the fact that constellations are decomposed into several BPSK (Bi Phase Shift Keying) or QPSK components (Quadri-Phase Shift Keying), being each one separately amplified and transmitted independently by an antenna. Therefore, several users can coexist since each user must know the configuration parameters asso- ciated to the constellation configuration, i.e., the direction in which the constellation is optimized, otherwise receives a degenerated constellation with useless data. The simulation results show the effectiveness in user data stream separation of the proposed approach.
Original languageUnknown
Title of host publicationPIERS Proceedings
Pages2132-2138
Publication statusPublished - 1 Jan 2014
EventPIERS -
Duration: 1 Jan 2014 → …

Conference

ConferencePIERS
Period1/01/14 → …

Cite this

@inproceedings{231c388b3bf74d49a8c3fafafc71b611,
title = "Multiple Input Multiple Output System with Multi User Support Based on Directive Information Transmission",
abstract = "Low interference and privacy are crucial requirements for system reliability and se- curity. Present and further mobile communication systems must support multiple users achieving at same time low interference levels. Several solutions can be adopted to reduce interference be- tween users, such as spreading codes or beam forming. For very high bit rates first solution must be discarded. On the other hand, in environments with a very high number of users beamforming can impose demanding hardware requirements in mobile devices, which is undesirable. Transmit- ters with directivity introduced at information level where the transmitted constellation is only optimized in the desired direction can also be used to assure low interference. Under this ap- proach, power efficiency on amplification can be also improved, due to the fact that constellations are decomposed into several BPSK (Bi Phase Shift Keying) or QPSK components (Quadri-Phase Shift Keying), being each one separately amplified and transmitted independently by an antenna. Therefore, several users can coexist since each user must know the configuration parameters asso- ciated to the constellation configuration, i.e., the direction in which the constellation is optimized, otherwise receives a degenerated constellation with useless data. The simulation results show the effectiveness in user data stream separation of the proposed approach.",
author = "{Montezuma de Carvalho}, {Paulo Miguel de Ara{\'u}jo Borges} and Dinis, {Rui Miguel Henriques Dias Morgado} and {DEE Group Author}",
year = "2014",
month = "1",
day = "1",
language = "Unknown",
isbn = "978-1-934142-28-8",
pages = "2132--2138",
booktitle = "PIERS Proceedings",

}

Multiple Input Multiple Output System with Multi User Support Based on Directive Information Transmission. / Montezuma de Carvalho, Paulo Miguel de Araújo Borges; Dinis, Rui Miguel Henriques Dias Morgado; DEE Group Author.

PIERS Proceedings. 2014. p. 2132-2138.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Low interference and privacy are crucial requirements for system reliability and se- curity. Present and further mobile communication systems must support multiple users achieving at same time low interference levels. Several solutions can be adopted to reduce interference be- tween users, such as spreading codes or beam forming. For very high bit rates first solution must be discarded. On the other hand, in environments with a very high number of users beamforming can impose demanding hardware requirements in mobile devices, which is undesirable. Transmit- ters with directivity introduced at information level where the transmitted constellation is only optimized in the desired direction can also be used to assure low interference. Under this ap- proach, power efficiency on amplification can be also improved, due to the fact that constellations are decomposed into several BPSK (Bi Phase Shift Keying) or QPSK components (Quadri-Phase Shift Keying), being each one separately amplified and transmitted independently by an antenna. Therefore, several users can coexist since each user must know the configuration parameters asso- ciated to the constellation configuration, i.e., the direction in which the constellation is optimized, otherwise receives a degenerated constellation with useless data. The simulation results show the effectiveness in user data stream separation of the proposed approach.

AB - Low interference and privacy are crucial requirements for system reliability and se- curity. Present and further mobile communication systems must support multiple users achieving at same time low interference levels. Several solutions can be adopted to reduce interference be- tween users, such as spreading codes or beam forming. For very high bit rates first solution must be discarded. On the other hand, in environments with a very high number of users beamforming can impose demanding hardware requirements in mobile devices, which is undesirable. Transmit- ters with directivity introduced at information level where the transmitted constellation is only optimized in the desired direction can also be used to assure low interference. Under this ap- proach, power efficiency on amplification can be also improved, due to the fact that constellations are decomposed into several BPSK (Bi Phase Shift Keying) or QPSK components (Quadri-Phase Shift Keying), being each one separately amplified and transmitted independently by an antenna. Therefore, several users can coexist since each user must know the configuration parameters asso- ciated to the constellation configuration, i.e., the direction in which the constellation is optimized, otherwise receives a degenerated constellation with useless data. The simulation results show the effectiveness in user data stream separation of the proposed approach.

M3 - Conference contribution

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