Implementación de un sistema basado en DS-CDMA utilizando usrps 2920 como transceiver.
The rise of mobile devices has created the need to implement in hardware new digital modulation techniques that allow not only increase the capacity of wireless systems, it also needs to make these more flexible. This paper aims to design and implementation of a DS-CDMA system with USRP 2920 as tran...
| Autor Principal: | Castillo Reimundo, Jenniffer Priscila |
|---|---|
| Formato: | bachelorThesis |
| Idioma: | spa |
| Publicado: |
2017
|
| Materias: | |
| Acceso en línea: |
http://dspace.ups.edu.ec/handle/123456789/13350 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: |
The rise of mobile devices has created the need to implement in hardware new digital modulation techniques that allow not only increase the capacity of wireless systems, it also needs to make these more flexible. This paper aims to design and implementation of a DS-CDMA system with USRP 2920 as transceiver using digital modulations PSK such as BPSK, QPSK, and 8-PSK, the digital communication system is designed for 16 users of which were implemented 4 comprises various transmitters and receivers that can be chosen depending on a pseudonoise sequence (pseudonoise PN), which is assigned according to the number of users, the number of users determines the number of USRPs to use , the proyect shows the characterization of the transmission power of USRP , the configuration of both transmitters and receivers, the system performance for different digital modulations is analyzed also the performance variation in channels with increased significant noise for different scenarios as modulation speed, distances, transmission power variation, chips pseudonoise sequence, varying number of users, finally to check the quality of the system it compares the DS-CDMA system vs a system without DS_CDMA . For each experimental configurations it is obtained as graphical results of constellation diagrams and the frequency spectrum in the transmitter and the receiver finally it shown graphs of BER. |
|---|