Performance and complexity of CDMA iterative multiuser detection
Christian B. Schlegel, Z. Shi · 2004
Low complexity multistage filters are inserted into the soft-information exchange paths of an iterative joint detector for error control coded CDMA signals. It is shown that these filters approach the performance of the optimal, but complex, per-user minimum-mean square error filter with a few stages. A variance transfer analysis is presented to quantify the performance of this method and to study the case of unequal received power distributions.