Title :
Interference resistant receivers for WCDMA MIMO downlink
Author :
Kiiskilä, Kai ; Hooli, Kari ; Ylioinas, Jari ; Juntti, Markku
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
fDate :
30 May-1 June 2005
Abstract :
Optimal and suboptimal spatial maximum a posteriori (MAP) receivers in a concatenation of linear minimum mean square error (LMMSE) equalizer structure are presented for multiple-input-multiple-output (MIMO) wideband code division multiple access (WCDMA) systems. The performance of a list sphere detector is compared to that of the spatial MAP and LMMSE-MAP receivers. The complexity of the receivers is also discussed. Finally, the LMMSE-MAP based receivers are proposed for the frequency selective fading channels where LMMSE part mitigates the multiple access interference (MAI) and inter-antenna interference (IAI) is mitigated by the spatial MAP or its approximation. Remarkable performance gains compared to the conventional rake receiver are observed in computer simulations with realistic WCDMA system parameters.
Keywords :
3G mobile communication; MIMO systems; broadband networks; code division multiple access; equalisers; fading channels; least mean squares methods; maximum likelihood estimation; radio links; radio receivers; radiofrequency interference; MAP receivers; MIMO; WCDMA; downlink; frequency selective fading channels; interantenna interference; interference resistant receivers; linear minimum mean square error equalizer; maximum a posteriori receivers; multiple access interference; multiple-input-multiple-output systems; sphere detector; wideband code division multiple access systems; Detectors; Downlink; Equalizers; Fading; MIMO; Mean square error methods; Multiaccess communication; Multiple access interference; RAKE receivers; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543422
