Impact of spatial correlation in the fading channel on the performance of a multi-antenna system

2001 ◽  
Author(s):  
R.S. Roberts
Keyword(s):  
Spatial Correlation ◽  
Fading Channel ◽  
Antenna System

scholarly journals Joint parameter estimation of multiuser asynchronous DS CDMA signals in unknown fading channel in DS CDMA system with multiple antennas at the base-station and single antenna at the mobile

2003 ◽  
Vol 16 (3) ◽  
pp. 327-341
Author(s):  
Milojko Eric ◽  
Miroslav Dukic ◽  
Milorad Obradovic
Keyword(s):  
Parameter Estimation ◽  
Fading Channel ◽  
Antenna System ◽  
Base Station ◽  
Joint Estimation ◽  
Cdma System ◽  
Multiple Antenna ◽  
Single Antenna ◽  
Direction Of Departure ◽  
Mobile Receiver

We present MUSIC type algorithm for joint parameter estimation in asynchronous DS CDMA system with multiple antenna system at base station and single antenna system at the mobile users. The proposed algorithm is applied in downlink processing and it enables the joint estimation of time delay frequency shift as well as spatial parameters (direction of departure - DOD of transmitted signal) of asynchronous DS CDMA signals using single antenna system at the mobile. The proposed algorithm is well suited to unknown fading channel, frequency selective or dispersive, and it can be primarily used as a method of 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. The proposed algorithm is near-far resistant, requires no preamble, and can be applied when the user sequences are not perfectly orthogonal.

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