Title :
MUSIC based joint parameter estimation of multiuser asynchronous DS CDMA signals in unknown fading channel in SIMO antenna system
Author :
Eric, Miljko ; Dukic, Miroslav L.
Author_Institution :
Inst. of Electr. Lnginecrinng, VTI, Belgrade, Serbia
Abstract :
A MUSIC type algorithm for joint parameter estimation in an asynchronous DS CDMA system with a multiple output (MO) antenna system at the base station and a single input (SI) system at the mobile users is proposed. It is applied in downlink processing and it enables the joint estimation of time delay, frequency shift and direction of departure (DOD) of transmitted asynchronous DS CDMA signals using a single antenna system at the mobile. The proposed algorithm is well suited to an unknown fading channel, frequency selective or dispersive, and it can be primary used as a method for multipath channel identification. It seems to the authors that it can be used as a basis for the further improvement of process of detection at the mobile receiver.
Keywords :
antenna arrays; array signal processing; code division multiple access; delay estimation; dispersive channels; fading channels; frequency estimation; land mobile radio; mobile antennas; multipath channels; multiuser channels; radio links; radio receivers; signal classification; spread spectrum communication; MUSIC based joint parameter estimation; MUSIC type algorithm; SIMO antenna system; antenna array; asynchronous DS CDMA signals; base station; direction of departure estimation; dispersive channel; downlink processing; fading channel; frequency selective channel; frequency shift estimation; joint time delay estimation; mobile receiver detection; multipath channel; multiple output antenna system; multiuser asynchronous DS CDMA signals; single antenna system; single input system; Base stations; Delay effects; Delay estimation; Downlink; Fading; Frequency estimation; Mobile antennas; Multiaccess communication; Multiple signal classification; Parameter estimation;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on
Print_ISBN :
0-7803-7627-7
DOI :
10.1109/ISSSTA.2002.1048591
