Yohei Kojima Kazuaki Takeda 0001 Fumiyuki Adachi 2-Step Maximum Likelihood Channel Estimation for Multicode DS-CDMA with Frequency-Domain Equalization. 2065-2071 2009 92-B IEICE Trans. Commun. 6 https://doi.org/10.1587/transcom.E92.B.2065 http://search.ieice.org/bin/summary.php?id=e92-b_6_2065&category=B&year=2009&lang=E&abst= db/journals/ieicet/ieicet92b.html#KojimaTA09