DELAY ESTIMATION IN CDMA COMMUNICATIONS USING A FAST ICA ALGORITHM
R–azvan Cristescu 1 , Tapani Ristaniemi 2 , Jyrki Joutsensalo 3 , and Juha Karhunen 1
firstname.lastname@example.org, email@example.com, firstname.lastname@example.org, Juha.Karhunen@hut.fi
In this paper, we propose a method for timing acqui
sition in a code division multiple access (CDMA) com
munications system. The assumptions made are that
the data signals corresponding to different users are sta
tistically independent, and that a minor pilot sequence
corresponding to the desired user is available. An in
dependent component analysis (ICA) approach based
on a fast fixedpoint algorithm is used for simultaneous
demodulation of the symbol sequence and finding of
synchronization information of the user of interest. No
additional pilot signal is used for the timing acquisition.
Our semiblind method performs better than conven
tional matched filter detector and CMOE receiver.