Interests in Time and Frequency Estimation

Alfred Hero has been interested in time and frequency estimation for over a decade; his 1984 Princeton PhD thesis was in the area of time delay estimation. These estimation problems are non-linear and arise in a very large number of applications including: active and passive radar and sonar, digital communications, array processing, direction finding, time-of-flight metrology, and MRFM.

Journal Articles

  • N. Antoniadis, and A.O. Hero
    "Time delay estimation for filtered Poisson processes using an EM-type algorithm,"
    IEEE Trans. on Signal Processing, Vol. 42, No. 8, pp 2112-2123, Aug. 1994. IEEE Explore reprint (.pdf) .

  • N. Petrick, A.O. Hero, N.H. Clinthorne, W.L. Rogers
    "A fast least squares estimator arrival time estimator for scintillation pulses,"
    IEEE Trans. on Nuclear Science , Vol. NS-41, No. 4, pp. 758-760, Aug. 1994. IEEE Explore reprint (.pdf) .

  • N. Petrick, A.O. Hero, N.H. Clinthorne, W.L. Rogers, and J.M. Slosar
    "Least squares arrival time estimators for single and piled up scintillation pulses,"
    IEEE Trans. on Nuclear Science , Vol. NS-40, No. 4, pp. 1026-1031, Aug. 1993. IEEE Explore reprint (.pdf) .

  • N. Petrick, A.O. Hero, N.H. Clinthorne, and W.L. Rogers
    "Least squares arrival time estimators for photons detected using a photomultiplier tube,"
    IEEE Trans. on Nuclear Science , Vol. NS-39, No. 4, pp. 738-743, Aug. 1992. IEEE Explore reprint (.pdf) .

  • A.O. Hero, N.H. Clinthorne and W.L. Rogers
    "A lower bound on PET timing estimation with pulse pileup,"
    IEEE Trans. Nuclear Science, Vol. NS-38, No. 2, pp. 709-712, April 1991.

  • A.O. Hero
    "Timing estimation for filtered Poisson processes in additive Gaussian noise,"
    IEEE Trans. on Information Theory, Vol. IT-37, pp. 92-106, Jan. 1991. Explore reprint (.pdf) .

  • N.A. Petrick, A.O. Hero, N.H. Clinthorne, and W.L. Rogers
    "First photoelectron timing error evaluation of a new scintillation detector model,"
    IEEE Trans. on Nuclear Science, Vol. NS-38, No. 2, pp. 174-177, April 1991. Explore reprint (.pdf) .

  • N.H. Clinthorne, N.A. Petrick, W.L. Rogers, A.O. Hero,
    "A fundamental limit on timing performance with scintillation detectors,"
    IEEE Trans. on Nuclear Science, Vol. NS-37, No. 2, pp. 658-663, April 1990. Explore reprint (.pdf) .

  • N.H. Clinthorne, A.O. Hero, and N. Petrick
    "Lower bounds on scintillation detector timing performance,"
    Nuclear Instrumentation and Methods in Phys. Res., Vol. A299, pp. 548-553, 1990.

  • N.H. Clinthorne, W.L. Rogers, L. Shao, A.O. Hero, K.F. Koral,
    "A new method for assessing position-sensitive detector performance,"
    IEEE Trans. on Nuclear Science, Vol. NS-36, No. 2, pp. 1127-1131, April 1989. Explore reprint (.pdf) .

  • A.O. Hero and S.C. Schwartz
    "Poisson models and mean square error for correlator estimators of time delay,"
    IEEE Trans. on Information Theory , Vol. IT-34, pp. 287-303, March 1988.

  • A.O. Hero and S.C. Schwartz
    "A new generalized cross-correlator,"
    IEEE Trans. on Acoustics, Speech and Signal Processing , Vol. ASSP-33, No. 1, pp. 38-45, Feb. 1985.
    Also appeared in the book Coherence and Time Delay Estimation: An Applied Tutorial for Research, Development, Test, and Evaluation Engineers, G.C. Carter, Ed., IEEE Press, 1993.

    Conference Proceedings

    C. Hory, M. Ting and A. O. Hero, "Frequency estimation derived from a dynamical system analysis," in Proceedings of IEEE Workshop Statistical Signal Processing (.pdf) , St. Louis, 2003.

  • J.K. Kim and A.O. Hero
    "Error intensity measures for multi-parameter tracking and passive bearing estimation,"
    Proceedings of the IEEE 1989 International Conference on Acoustics, Speech, and Signal Processing, pp. 2641-2644, Glasgow, UK, May 1989.

    Prof. Alfred Hero III
    Dept. of Electrical Engineering and Computer Science
    The University of Michigan
    1301 Beal Avenue
    Ann Arbor, MI 48109-2122
    Tel. (313) 763-0564
    FAX: (313) 763-8041
    WWW: http://www.eecs.umich.edu/~hero/hero.html
    email: