Título: Space Diversity for OFDM-CDMA Systems over Fading Radio Channels

Autores: Roberto Uribeetxeberria and Rolando A. Carrasco

Fecha: April 2000

Area: Redes

Tema:

Abstract: The application of adaptive space diversity combining algorithms in a Multicarrier Code Division Multiple Access (CDMA) system is presented in this paper. This novel approach enables space and time diversity combining of the signals, and is evaluated over multipath fading channels. Third generation mobile communication systems are expected to provide high quality voice, data and image transmission. Such high quality multimedia services can only be achieved with a reliable transmission and Multicarrier CDMA is a suitable multiple access technique. In CDMA many subscribers can be accessed by allocating a unique, orthogonal spreading code but CDMA is subject to severe intersymbol interference due to the ultra-high speed requirement in the demodulation. On the other hand Multicarrier Modulation enables high data rate transmissions and the modulation and demodulation is based on Inverse Fast Fourier Transform and Fast Fourier Transform respectively which could be easily implemented with actual VLSI technology. However, there are several problems in the mobile radio channel including co-channel interference, multipath fading and high Doppler rates. These limitations can be reduced using signal processing techniques with antenna arrays.

[pdf]

Referencia: In Proceedings of the 2nd Conference on Postgraduate Research in Electronics, Photonics and Related Fiels, PREP2000
ISBN: 0-86341-321-8. Nottingham, UK

bibtex:
@INPROCEEDINGS{uri00,
  author = {Roberto Uribeetxeberria and R. A. Carrasco},
  title = {Space Diversity for {OFDM-CDMA} Systems over Fading Radio Channels},
  booktitle = {In Proceedings of the 2nd Conference on Postgraduate Research in
    Electronics, Photonics and Related Fiels, {PREP2000}},
  year = {2000},
  address = {Nottingham, UK}
}