Title :
Reconfigurable adaptive RAKE receiver for wideband CDMA systems
Author :
Latva-aho, Matti ; Juntti, Markku ; Oppermann, Ian
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
Conventional RAKE receiver is near-far limited in code-division multiple-access (CDMA) systems. Linear minimum mean squared error (LMMSE) criterion can be used to obtain near-far resistant single-user receivers. Depending on the optimization criterion different adaptive receivers are obtained. A novel adaptive LMMSE-RAKE receiver based on two different LMMSE criteria is presented. The receiver combines the conventional RAKE receiver and single-user LMMSE receivers. Depending on a quality indicator the receiver switches itself to different modes depending on the radio channel conditions. According to the simulation results the novel receiver concept remarkably improves the performance of the conventional RAKE receivers under various channel conditions and data rates
Keywords :
adaptive signal detection; broadband networks; code division multiple access; fading channels; least mean squares methods; multiuser channels; optimisation; radio receivers; LMMSE detection; adaptive LMMSE-RAKE receiver; code-division multiple-access; data rates; fading channels; linear minimum mean squared error; near-far resistant single-user receivers; optimization criterion; quality indicator; radio channel conditions; reconfigurable adaptive RAKE receiver; simulation results; wideband CDMA systems; Convergence; Delay estimation; Ear; Fading; Multiaccess communication; Multipath channels; RAKE receivers; Switches; Wideband; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 1998. VTC 98. 48th IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-4320-4
DOI :
10.1109/VETEC.1998.686054
