Title :
Uplink channel estimation in DS/CDMA mobile radio systems with antenna arrays using subspace identification methods
Author :
Martone, Massimiliano
Author_Institution :
Telecommun. Group, Watson Johnson Co., Gaithersburg, MD, USA
fDate :
29 Sep-2 Oct 1996
Abstract :
The application of array processing methods in a code division multiple access system with antenna arrays is proposed as a method to improve system performance. Subspaces opthogonality is exploited to estimate the channels with a method similar to the one recently proposed by Moulines et al. (see IEEE Trans. Signal Processing, vo1.43, no.2, 1995). The knowledge of the baseband channels is used in the design of a receiving multi-channel filter that can be seen also as a spatial-temporal combining scheme. The approach is effective also in presence of severe interference among users caused by very short codes or worst case delays and frequency selective multipath propagation
Keywords :
FIR filters; antenna arrays; array signal processing; code division multiple access; direction-of-arrival estimation; diversity reception; filtering theory; interference suppression; land mobile radio; multipath channels; pseudonoise codes; radio links; radiofrequency filters; radiofrequency interference; spread spectrum communication; DS/CDMA mobile radio systems; FIR filters; antenna arrays; antenna diversity; array processing methods; baseband channels; frequency selective multipath propagation; interference; receiving multichannel filter; spatial-temporal combining scheme; subspace identification methods; subspaces opthogonality; system performance; uplink channel estimation; very short codes; worst case delays; Antenna arrays; Array signal processing; Baseband; Channel estimation; Delay effects; Filters; Interference; Land mobile radio; Multiaccess communication; System performance;
Conference_Titel :
Universal Personal Communications, 1996. Record., 1996 5th IEEE International Conference on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-3300-4
DOI :
10.1109/ICUPC.1996.562729
