A power control scheme using turbo partial parallel interference cancellation for DS-CDMA wireless communications

A low-complexity power control scheme for direct-sequence code-division multiple access systems is presented. In the proposed structure, we exploit the interference cancellation capability of the turbo partial parallel interference cancellation (TPPIC) algorithm presented by Wu and Wang (see Proc. 2001 IEEE Global Telecommun. Conf (Globecom 2001), San Antonio, TX, Nov. 2001, p.244-248). A new method for parameter estimation is also presented and is integrated with the powerful TPPIC in power control algorithm design. Computer simulation results show that this new approach significantly outperforms the previous scheme using conventional parallel interference cancellation, where both involve the same order of complexity. As compared to the more complicated power control methods using minimum mean-squared error (MMSE) filtering, the proposed approach still provides better performance but involves much less complexity.