Massimiliano Siti Michael P. Fitz On Layer Ordering Techniques for Near-optimal MIMO Detectors. 1199-1204 2007 WCNC http://doi.ieeecomputersociety.org/10.1109/WCNC.2007.227 conf/wcnc/2007 db/conf/wcnc/wcnc2007.html#SitiF07