TY - GEN
T1 - Adaptive bit loading with multi-user diversity in MC-CDMA
AU - Gutiérrez, I.
AU - Bader, F.
AU - Pijoan, J. L.
AU - Deumal, M.
PY - 2006
Y1 - 2006
N2 - During the last years it has been shown that Multi-Carrier Spread Spectrum (MC-SS) systems offers great spectral efficiency, robustness and flexibility. For high data rate in multi-user environments large bandwidth is necessary and dynamic resource allocation (DRA) becomes essential. When coming to adaptive systems many techniques have been proposed for OFDM systems that implement bit loading, sub-carrier and user allocation, power loading, adaptive coding, etc. For MS-SS these techniques must be adapted in order to achieve the optimum performance. In this work, a new scheduling algorithm exploiting multi-user diversity and adaptive bit loading for MC-CDMA is proposed. This system performs better than other adaptive OFDM systems when non-perfect channel estimation is considered since frequency spreading smoothes the estimation errors.
AB - During the last years it has been shown that Multi-Carrier Spread Spectrum (MC-SS) systems offers great spectral efficiency, robustness and flexibility. For high data rate in multi-user environments large bandwidth is necessary and dynamic resource allocation (DRA) becomes essential. When coming to adaptive systems many techniques have been proposed for OFDM systems that implement bit loading, sub-carrier and user allocation, power loading, adaptive coding, etc. For MS-SS these techniques must be adapted in order to achieve the optimum performance. In this work, a new scheduling algorithm exploiting multi-user diversity and adaptive bit loading for MC-CDMA is proposed. This system performs better than other adaptive OFDM systems when non-perfect channel estimation is considered since frequency spreading smoothes the estimation errors.
UR - http://www.scopus.com/inward/record.url?scp=84946238509&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84946238509
T3 - 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications, European Wireless 2006
BT - 12th European Wireless Conference 2006 - Enabling Technologies for Wireless Multimedia Communications, European Wireless 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th European Wireless Conference on Enabling Technologies for Wireless Multimedia Communications, European Wireless 2006
Y2 - 2 April 2006 through 5 April 2006
ER -