Title :
An optimum combining and concatenated-RAKE for dual-antenna mobile terminals in UMTS
Author :
Tantikovit, S. ; Wang, M.Z.
Author_Institution :
Dept. of Electr. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China
fDate :
6/1/2002 12:00:00 AM
Abstract :
The downlink of UMTS employs variable spreading factor and multicode to support variable data rate transmissions. In multicode and low spreading factor scenarios, interpath interference (IPI) among code channels is a principle factor that needs to be taken into consideration in system design. For example, the RAKE receiver with conventional maximum-ratio-combining suffers greatly from the presence of IPI. We present a new receiver structure that effectively incorporates an optimum combining scheme and dual-antenna diversity to enhance system performance.
Keywords :
Rayleigh channels; adaptive antenna arrays; cellular radio; diversity reception; interference suppression; multipath channels; radio links; radio receivers; radiofrequency interference; spread spectrum communication; telecommunication terminals; RAKE receiver; UMTS downlink; adaptive antenna array; code channels; concatenated-RAKE; dual-antenna diversity; dual-antenna mobile terminals; four-path Rayleigh fading channel; interference suppression; interpath interference; low spreading factor; maximum ratio combining; multicode; optimum combining; system performance; variable data rate transmission; variable spreading factor; 3G mobile communication; Antenna arrays; Degradation; Diversity reception; Downlink; Fading; Fingers; Multipath channels; RAKE receivers; Radiofrequency interference;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2002.1010864
