Data detection techniques for DS/CDMA mobile systems: a review

As system requirements in terms of the BER performance and capacity increase, so will the need for more advanced detection techniques. The application of advanced receiver structures is optional for phase 2 of the UMTS FDD mode, while it is mandatory for the time-division duplex mode. Layer 1 of both modes is based on wideband direct sequence code-division multiple access technology, where a physical channel is characterized by the code, frequency, and, in the uplink, the relative phase (I/Q). Furthermore, in the TDD mode the physical channel is also characterized by the time slot (TDMA component).