Interference resistant blind acquisition and channel estimation for CDMA communication systems

The time scale over which a channel is observed determines whether a deterministic or statistical characterization is appropriate. We show that the channel estimation algorithm of Tsatsanis and Xu (see Proc. 31st Conf. Inform. Sci. Systems (CISS) John Hopkins Univ., Baltitmore, MD, p.724-29, 1997) and the acquisition algorithm of Sayeed and Aazhang (see Proc. 91st Conf. Inform. Sci. Systems (CISS) Princeton, NJ, 1998) share a common MMSE formulation. They differ only in the assumption of the channel characterization. From this observation we develop a new blind MMSE interference resistant algorithm for both timing acquisition and channel estimation that is applicable to both deterministic and statistical channel models. Simulations illustrate the effectiveness of the new method