Title :
Spreading Sequence Assignment in WCDMA for Distributed Antenna Arrays Based on Interference Model
Author :
Botella, C. ; Pinero, G. ; Gonzalez, A. ; de Diego, M.
Author_Institution :
Inst. of Telecommun. & Multimedia Applications, Univ. Politecnica de Valencia
Abstract :
A new spreading sequence assignment scheme for WCDMA is proposed in this paper. It is based on a simple but exhaustive model of the interferences involved: multiple access (MAI) and inter-finger interferences (IFI) at a mobile RAKE receiver output. These interferences are mainly determined in this work by the correlation properties of the spreading sequences. The new approach assigns spreading sequences in a way that minimum interference power between active users can be achieved. Simulation results show that the new scheme outperforms natural (consecutive ordering) scheme for the typical central situation of antenna arrays in a cell, but these benefits are even higher for a configuration of distributed antenna arrays around the cell
Keywords :
antenna arrays; code division multiple access; interference (signal); mobile radio; radio receivers; WCDMA; consecutive ordering scheme; correlation properties; distributed antenna arrays; inter-finger interferences; interference model; mobile RAKE receiver output; multiple access interferences; spreading sequence assignment scheme; Analytical models; Antenna arrays; Diversity reception; Downlink; Fading; Multiaccess communication; Multipath channels; Multiple access interference; Power control; Power system modeling;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2006. SPAWC '06. IEEE 7th Workshop on
Conference_Location :
Cannes
Print_ISBN :
0-7803-9710-X
Electronic_ISBN :
0-7803-9711-8
DOI :
10.1109/SPAWC.2006.346438
