Title :
Constrained MMSE-RAKE receivers for DS/CDMA systems in multipath fading channels
Author :
Hong, Seung-Chul ; Choi, Jinho ; Kim, Seong Rag ; Lee, Yong H.
Author_Institution :
Div. of EECS, Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
6/24/1905 12:00:00 AM
Abstract :
The constrained minimum mean square error (CMMSE)-RAKE receivers for multipath fading channels are analyzed. In particular, it is shown that for known channels the output signal-to-interference and noise ratio (SINR) of the CMMSE-RAKE receiver with a single constraint (Type 1) is greater than or equal to that of the CMMSE-RAKE with multiple constraints (Type 2). For Type 1 CMMSE-RAKE receiver, a maximum likelihood (ML) channel estimate is derived. Computer simulation results indicate that CMMSE receivers improve the bit error rate (BER) as compared with the conventional RAKE and currently available adaptive MMSE receivers, and that Type 1 performs the best.
Keywords :
code division multiple access; error statistics; fading channels; least mean squares methods; maximum likelihood estimation; mobile radio; multipath channels; radio receivers; spread spectrum communication; BER; CMMSE RAKE receivers; DS-CDMA; ML channel estimate; Type 1 receiver; Type 2 receiver; bit error rate; constrained minimum mean square error; maximum likelihood estimate; multipath fading channels; multiple constraints; output SINR; signal-to-interference and noise ratio; single constraint; Attenuation; Broadcast technology; Fading; Filters; Gaussian noise; Multiaccess communication; Pulse shaping methods; RAKE receivers; Shape; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference, 2002. VTC Spring 2002. IEEE 55th
Print_ISBN :
0-7803-7484-3
DOI :
10.1109/VTC.2002.1002537
