%0 Journal Article %T Karhunen-Lo¨¨ve-Based Reduced-Complexity Representation of the Mixed-Density Messages in SPA on Factor Graph and Its Impact on BER %A Pavel Prochazka %A Jan Sykora %J EURASIP Journal on Wireless Communications and Networking %D 2010 %I Springer %R 10.1155/2010/574607 %U http://dx.doi.org/10.1155/2010/574607