Title :
Subspace based detection in MC-CDMA over dispersive channel
Author :
Li, Chengyang ; Roy, Sumit
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
A new blind MMSE detection for multi-carrier CDMA (MC-CDMA) over intersymbol interference (ISI) channels is proposed. The presence of virtual carriers is exploited to give a subspace based blind channel estimator followed by a linear MMSE equalizer. The proposed detector is attractive for its higher spectral efficiency, which is achieved by the elimination of cyclic prefix and training sequences. The complexity of the full dimension subspace detection can be reduced at the cost of some performance degradation. Representative results are provided to show the performance-complexity tradeoffs
Keywords :
code division multiple access; computational complexity; dispersive channels; equalisers; intersymbol interference; least mean squares methods; parameter estimation; signal detection; ISI channels; MC-CDMA; blind MMSE detection; blind channel estimator; cyclic prefix elimination; dispersive channel; intersymbol interference; linear MMSE equalizer; multicarrier CDMA; performance-complexity tradeoff; spectral efficiency; subspace based detection; training sequence elimination; virtual carriers; Bandwidth; Costs; Detectors; Dispersion; Ear; Equalizers; Intersymbol interference; Multiaccess communication; Multicarrier code division multiple access; OFDM;
Conference_Titel :
Personal Wireless Communications, 2000 IEEE International Conference on
Conference_Location :
Hyderabad
Print_ISBN :
0-7803-5893-7
DOI :
10.1109/ICPWC.2000.905781
