István Z. Kovács Klaus I. Pedersen Troels E. Kolding Akhilesh Pokhariyal Markku Kuusela Effects of Non-Ideal Channel Feedback on Dual-Stream MIMO-OFDMA System Performance. 1852-1856 2007 conf/vtc/2007f VTC Fall http://dx.doi.org/10.1109/VETECF.2007.390 db/conf/vtc/vtc2007f.html#KovacsPKPK07