Pirouz Zarrinkhat Masoud Ardakani Raman Yazdani Channel Estimation Considerations for Iterative Decoding in Wireless Communications. 1006-1011 2007 ICC http://dx.doi.org/10.1109/ICC.2007.171 conf/icc/2007 db/conf/icc/icc2007.html#ZarrinkhatAY07