Adaptive-rank receiver for space-time DS-CDMA systems

Author

Nicoli, Monica ; Spagnolini, Umberto

Author_Institution

Dipt. di Elettronica e Inf., Politecnico di Milano, Italy

Volume

1

fYear

2001

fDate

2001

Firstpage

78

Abstract

We propose a reduced rank space-time receiver for multi-user time slotted CDMA systems. The channel estimation is based on an under-parameterization of the space-time channel model. The channels for all users are estimated jointly by constraining the channel matrix of each user to be low-rank. As the rank depends on the interference level and the characteristics of the propagation environment (delay and angle spreads), the rank-order is estimated adaptively for each user according to the MDL criterion (minimum description length)

Keywords

adaptive systems; cellular radio; code division multiple access; delays; matrix algebra; multiuser channels; parameter estimation; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; MDL criterion; adaptive-rank receiver; angle spread; channel estimation; delay spread; interference level; low-rank channel matrix; minimum description length; multi-user detection; multi-user time slotted CDMA systems; propagation environment; rank-order estimation; reduced space-time receiver; space-time DS-CDMA systems; space-time channel model; third generation cellular systems; under-parameterization; Channel estimation; Character generation; Delay estimation; Detectors; Mobile antennas; Multiaccess communication; Multiuser detection; Propagation delay; Radio transmitters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944807

Filename

944807