Multistage interference cancellation with frequency domain equalization for uplink transmission of single carrier cyclic prefix assisted CDMA system

In this paper we suggest a new single carrier cyclic prefix assisted multiple access scheme for the asynchronous broadband CDMA system in uplink. Frequency domain equalization is applied instead of conventional RAKE combining or time domain equalization. A new serial type multistage interference cancellation in frequency domain is proposed to cancel the multiple access interference while keeping low computational complexity. We also investigated the effects of interference rejection weight control for this multistage interference cancellation. Another hybrid system combining the successive interference cancellation and parallel interference cancellation is also proposed, which can reach the similar performance of the serial type while reducing the processing delay greatly.