Blind Estimation of Direct Sequence Spread Spectrum Signals(7)

Abstract—Self-recovering receivers for direct-sequence spreadspectrum signals with unknown spreading codes are discussed in this paper. Applications include signal interception, jamming, and low probability of intercept (LPI) communications. A multirate/m

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Michail K.Tsatsanis(M’93)was born in Patras,

Greece,in1964.He received the Diploma degree

in electrical engineering from the National Technical

University of Athens,Greece,in1987and the M.Sc.

and Ph.D degrees in electrical engineering from the

University of Virginia,Charlottesville,in1990and

1993,respectively.

From1986until1988,he was with Binary Logic

Applications,Athens,Greece,where he worked on

the design and development of digital systems for

industrial control.From1994to1995,he worked as a research associate at the Department of Electrical Engineering,University of Virginia.In1995,he joined the Electrical and Computer Enginering Department,Stevens Institute of Technology,Hoboken,NJ,as an assistant professor.His general research interests lie in the areas of statistical signal processing,digital communications,system identification,pattern recognition, higher order statistics,and multiresolution analysis.His current interests focus on equalization and synchronization problems in single-user and multiuser communication systems.

Dr.Tsatsanis has served as a member of the organizing committee for the IEEE1996SSAP Workshop and is a member of the Technical Chamber of

Greece.

Georgios B.Giannakis(F’96)received the

Diploma degree in electrical engineering from the

National Technical University of Athens,Greece,

1981.From September1982to July1986,he was

with the University of Southern California(USC),

Los Angeles,where he received the M.Sc.degree

in electrical engineering in1983,the M.Sc.degree

in mathematics in1986,and the Ph.D.degree in

electrical engineering in1986.

After lecturing for one year at USC,he joined the

University of Virginia,Charlottesville,in September 1987,where he is now a professor with the Department of Electrical Engineering.His general interests lie in the areas of signal processing, estimation and detection theory,and system identification.Specific research areas of current interest include diversity techniques for channel estimation and multiuser communications,nonstationary and cyclostationary signal analysis,wavelets in statistical signal processing,and non-Gaussian signal processing using higher order statistics with applications to sonar,array,and image processing.

Dr.Giannakis received the IEEE Signal Processing Society’s1992Paper Award in the Statistical Signal and Array Processing(SSAP)area.He co-organized the1993IEEE Signal Processing Workshop on Higher Order Statistics,the1996IEEE Workshop on Statistical Signal and Array Processing, and thefirst IEEE Signal Processing Workshop on Wireless Communications in1997.He guest co-edited two special issues on high-order statistics (International Journal of Adaptive Control and Signal Processing and the EURASIP journal Signal Processing)and a special issue on signal processing for advanced communications(IEEE T RANSACTIONS ON S IGNAL P ROCESSING, Jan.1997).He has served as Associate Editor for the IEEE T RANSACTIONS ON S IGNAL P ROCESSING and the IEEE S IGNAL P ROCESSING L ETTERS,as secretary of the Signal Processing Conference Board,and as member of the SP Publications board and the SSAP Technical Committee.He is also a member of the IMS and the European Association for Signal Processing.