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Error probabilities of CDMA systems with beamforming under different power control schemes

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2 Author(s)
Jin Yu ; Dept. of Electr. & Comput. Eng., Stevens Inst. of Technol., Hoboken, NJ, USA ; Yu-Dong Yao

The reverse link error probability of multicell direct-sequence code-division multiple-access (DS-CDMA) systems with beamforming and Rake receivers is evaluated in this paper. The impact of power control schemes on the error probability is examined, considering power-based power control (PW-PC) and signal-to-interference ratio (SIR) based power control (SIR-PC). Expressions for the error probability as a function of the number of users per cell, the number of antenna elements, the number of Rake receiver fingers, and the CDMA processing gain are derived and both multipath interference and interference due to other users (own and other cells) are taken into consideration in the evaluation. Numeric results indicate that CDMA systems with different power control schemes have the same reverse link user capacity for a given target bit-error rate. However, the SIR-PC approach consumes less power than PW-PC when the number of users is smaller than the user capacity.

Published in:

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th  (Volume:7 )

Date of Conference:

26-29 Sept. 2004