Abstract
| Original language | Unknown |
|---|---|
| Title of host publication | PIERS Proceedings |
| Pages | 2132-2138 |
| Publication status | Published - 1 Jan 2014 |
| Event | PIERS - Duration: 1 Jan 2014 → … |
Conference
| Conference | PIERS |
|---|---|
| Period | 1/01/14 → … |
Cite this
}
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 proceeding › Conference contribution
TY - GEN
T1 - Multiple Input Multiple Output System with Multi User Support Based on Directive Information Transmission
AU - Montezuma de Carvalho, Paulo Miguel de Araújo Borges
AU - Dinis, Rui Miguel Henriques Dias Morgado
AU - DEE Group Author
PY - 2014/1/1
Y1 - 2014/1/1
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
SN - 978-1-934142-28-8
SP - 2132
EP - 2138
BT - PIERS Proceedings
ER -