Title :
On combining schemes for W-CDMA RAKE reception in the presence of interpath interference
Author :
Tantikovit, S. ; Wang, M.Z. ; Sheikh, A.U.H.
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hung Hom, China
Abstract :
In Tantikovit et al., (2000), we presented a signal model for interpath interference (IPI) in low spreading factor long-code wideband-CDMA (W-CDMA) systems and showed that the impact of IPI can be decomposed into branch correlation and co-channel interference similar to those in an adaptive array system. We consequently derived optimum and suboptimum combining schemes for the RAKE receiver, which provide significant improvement over the conventional maximum-ratio combining. In this paper, we derive the theoretical probability density function (pdf) of the signal-to-interference-plus-noise ratio and outage probability of the optimum combining scheme in a semi-analytical fashion. The obtained analytical results closely agree with simulation results
Keywords :
adjacent channel interference; cochannel interference; code division multiple access; diversity reception; optimisation; probability; radio receivers; spread spectrum communication; IPI; RAKE receiver; W-CDMA; branch correlation; co-channel interference; interpath interference; long-code wideband-CDMA; optimum combining scheme; outage probability; pdf; probability density function; signal-to-interference-plus-noise ratio; spreading factor; Adaptive arrays; Adaptive systems; Analytical models; Computer simulation; Fading; Fingers; Interference; Multiaccess communication; Petroleum; Rayleigh channels;
Conference_Titel :
Wireless Communications, 2001. (SPAWC '01). 2001 IEEE Third Workshop on Signal Processing Advances in
Conference_Location :
Taiwan
Print_ISBN :
0-7803-6720-0
DOI :
10.1109/SPAWC.2001.923828
