An ASIC implementation of a WCDMA mobile terminal with 2-dimensional adaptive antenna-rake combining is presented in this paper. System analysis shows that adaptive antenna-rake combining techniques can significantly enhance the performance and capacity of cellular systems compared to conventional CDMA systems. A hardware efficient receiver architecture is implemented supporting both maximal ratio combing (MRC) and least mean squares (LMS) algorithm. Moreover, the proposed architectures allows for a dynamic and flexible allocation of available processing resources (total of 20 fingers) to different antennas and multipaths based on the instantaneous channel profile. The presented receiver can operate in both normal and space time transmit diversity (STTD) modes. The system was implemented in a 0.18μm CMOS process and the improvement was validated through real-time field trials. © 2005 IEEE.
|Original language||English (US)|
|Title of host publication||Proceedings of the Custom Integrated Circuits Conference|
|State||Published - Dec 1 2005|