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An optimum combining and concatenated-RAKE for dual-antenna mobile terminals in UMTS

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2 Author(s)
Tantikovit, S. ; Dept. of Electr. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China ; Wang, M.Z.

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.

Published in:

Communications Letters, IEEE  (Volume:6 ,  Issue: 6 )