Alfred Hero - Interests in Communications and Networking

We have activites in a broad scope of communications and networking including: Shannon theory, capacity limits for space-time coding, network measurements and inference, Internet tomography, sensor networks, channel equalization, information theoretic applications of random graphs, modulation classification, and maximum likelihood sequence estimation. Some publications are included below (linked files are *.ps.Z or .pdf files unless otherwise noted.)

Journal Publications

  • N. Patwari, A. O. Hero, J. Ash, R. L. Moses, S. Kyperountas, N. S. Correal, "It takes a network: cooperative geolocation of wireless sensors", (.pdf) , submitted to IEEE Signal Processing Magazine. Link to data presented in this article on Wireless Sensor Network Localization Measurement Repository (.html)

  • J. Costa, N. Patwari and A. O. Hero, "Distributed multidimensional scaling with adaptive weighting for node localization in sensor networks", (.pdf) , submitted to ACM Journal on Networking, June 2004.

  • "Multiple antenna capacity in a deterministic Rician fading channel," (.ps) or (.pdf) , M. Godavarti and A. O. Hero , submitted to IEEE Trans. on Info Theory , Sept. 2001.

  • "Partial update LMS algorithms," (.pdf) , M. Godavarti and A. O. Hero, to appear in IEEE Trans. on SP. This is a condensation of material in the original two papers (containing many more details) submitted to the IEEE SP Trans. in Oct. 2001: Paper 1 (.pdf) , Paper 2 (.pdf) ,

  • "Min-Capacity of a Multiple-Antenna Wireless Channel in a Static Rician Fading Environment," M. Godavarti, A. O. Hero, and T. Marzetta, to appear in IEEE Trans. on Wireless Communications . (.pdf) .

  • "Convergence of differential entropies," M. Godavarti and A. O. Hero , IEEE Trans. on Info Theory , Vol 50, No. 1, pp. 171-176, Jan. 2004. (.pdf) . IEEE Explore reprint (.pdf)

  • "Secure Space-Time Communication," A. O. Hero , IEEE Trans. on Info Theory , Vol. 49, No. 12, pp. 1-16, Dec. 2003. (.pdf) . IEEE Explore reprint (.pdf)

  • "Relative location estimation in sensor networks," (.pdf) , N. Patwari, A. O. Hero, M. Perkins, N. S. Correal and R. J. O'Dea , IEEE Trans. on Signal Processing, Special Issue on Signal Processing in Networking , vol. 51, No. 9, pp. 2137-2148, Aug. 2003. Longer web version with color photos (.pdf) . IEEE Explore reprint (.pdf)

  • "Unicast-based inference of network link delay distributions using mixed finite mixture models," (.pdf) , M.F. Shih and A. O. Hero , IEEE Trans. on Signal Processing, Special Issue on Signal Processing in Networking , vol. 51, No. 9, pp. 2219-2228, Aug. 2003. IEEE Explore reprint (.pdf)

  • "High Rate Vector Quantization for Detection," (.pdf), R. Gupta and A.O. Hero, IEEE Trans. on Info Theory , vol. 49, No. 8, pp. 1951-1969, Aug. 2003. IEEE Explore reprint (.pdf)

  • "Environmental Issues for MIMO capacity", (.pdf), Dan Bliss, K. Forsythe, A. Hero and A. F. Yugulalp, IEEE Trans on Signal Processing, Vol. 50, No. 9, pp. 2128-2142, Sept. 2002. IEEE Explore reprint (.pdf)

  • "Internet Tomography", (.pdf), Mark Coates, Alfred Hero, Robert Nowak, Bin Yu, IEEE Signal Processing Magazine, Vol. 19, No. 3, pp. 47-65, May 2002. IEEE Explore reprint (.pdf)

  • "Cut-off Rate and Signal Design for the Quasi-Static Rayleigh Fading Space-Time Channel," (.pdf) , A. O. Hero and T. L. Marzetta , IEEE Trans. on Info Theory , Vol 27, No 6, pp 2400-2416, July 2001. IEEE Explore reprint (.pdf)

  • "Power vs. Performance Tradeoffs for Reduced Resolution Adaptive Filters", (.ps.Z) , (.ps) , R. Gupta and A. O. Hero,IEEE Transactions on Signal Processing, Vol. SP-48, No. 10, pp. 2772-2784, Sept. 2000. IEEE Explore reprint (.pdf) .

  • "A maximum likelihood digital receiver using coordinate ascent and the discrete wavelet transform", (.pdf) , I. Sharfer and A. O. Hero , in IEEE Transactions on Signal Processing, Vol. 47, No. 3, pp. 813-825, Mar. 1999. IEEE Explore reprint (.pdf) .

  • "Data-recursive algorithms for blind channel identification in direct-sequence systems", (.ps.Z) , D. Goeckel, A. O. Hero, and W. E. Stark, IEEE Transactions on Signal Processing, Vol. 46, No. 8, pp. 2217-2220, Aug. 1998. IEEE Explore reprint (.pdf) .

    • Technical reports

  • "Generalized Proximal Point Algorithms and Bundle Implementations," S. Chretien and A. O. Hero CSPL Technical Report CSPL-313, Aug. 1998.

    Conference Proceedings

  • "Distributed maximum likelihood estimation in sensor networks," (.pdf), D. Blatt and A. O. Hero, Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc, Montreal, May, 2004.

  • "Manifold learning algorithms for localization in wireless sensor networks," (.pdf), N. Patwari and A. O. Hero, Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc, Montreal, May, 2004.

  • "Network Topology Discovery using Finite Mixture Models," (.pdf), M.-F. Shih and A. O. Hero, Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Montreal, May, 2004.

  • " Using Proximity and Quantized RSS for Sensor Localization in Wireless Networks," (.pdf), N. Patwari and A. O. Hero, Proc. of 2nd International ACM Workshop on Wireless Sensor Networks and Applications (WSNA),, San Diego, CA, Sept, 2003.

  • "Reducing transmissions from wireless sensors in distributed detection networks using hierarchical censoring," (.pdf), N. Patwari and A. O. Hero, Proc. of IEEE Workshop on Statistical Signal Processing, St. Louis, 2003.

  • "Hierarchical censoring for distributed detection in wireless sensor networks," (.pdf), N. Patwari and A. O. Hero, Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Hong Kong, May 2003.

  • "Location estimation accuracy in wireless sensor networks," (.pdf), N. Patwari and A. O. Hero, Proc. of IEEE Asilomar Conference on Signals, Systems and Computers,, Pacific Grove, CA, Nov. 2002.

  • "Unicast-based inference of network link delay distributions using finite-mixture models" (.pdf), M.-F. Shih and A. O. Hero Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Orlando FL May 2002.

  • "Diversity and degrees of freedom in wireless communications" (.pdf) , M. Godavarti and A. O. Hero Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Orlando FL, May 2001.

  • "Stability anlaysis of the sequential partial update LMS algorithm" .ps.Z , or (.ps) , M. Godavarti and A. O. Hero Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Salt Lake City UT May 2001.

  • "Estimation of network link loss rates via chaining in multicast trees," (.ps.Z) or (.ps) , A.-G. Ziotopoulos, A. O. Hero, and K. M. Wasserman Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc., Salt Lake City UT May 2001.

  • "Unicast inference of network link delay distributions from edge measurements" (.ps.Z) or (.ps), M.-F. Shih and A. O. Hero Proc. of IEEE Int. Conf. on Acoust. Speech and Sig. Proc. (invited), Salt Lake City UT May 2001.

  • "MIMO Environmental Capacity Sensitivity", (.pdf) D. W. Bliss K. W. Forsythe, A. O. Hero, and A. L. Swindlehurst, Proc. of IEEE Asilomar Conference on Sig, Syst., and Comm.,, Pacific Grove CA, Oct. 2000.

  • "Space-time cut-off rate for the flat Rayleigh fading channel," (.ps.Z) A. O. Hero and T. L. Marzetta, Proceedings of the IEEE 2000 International Symposium on Information Theory , Sorrento, Italy.

  • " Transient behavior of fixed point LMS adaptation", R. Gupta, A. O. Hero Proceedings of IEEE ICASSP 2000 , Istanbul, June 2000.

  • " Performance and complexity analysis of VLSI multi-carrier receivers for low-energy wireless communications", S. Hong, R. Gupta, W. E. Stark, A. O. Hero Proceedings of the IEEE 2000 Vehicular Technology Conference, May 2000.

  • " Optimal signal constellations for space-time Rayleigh channels A. O. Hero and T. L. Marzetta, Proceedings of the 2000 Workshop on Sensors, Arrays and Multichannel Signal Processing, MIT Mar. 2000.

  • M. Godavarti and A. O. Hero
    "Stability bounds on step size for the partial update LMS algorithm,"
    Proceedings of the IEEE 1999 Conf. Acoust., Speech, and Sig. Proc. (ICASSP) , Phoenix, March 1999.

  • A. O. Hero and R. Gupta
    "Power vs. Performance Tradeoffs for Reduced Resolution Adaptive Equalizers,"
    Proceedings of the IEEE 1998 Conf. on Miltary Communications , San Diego, Sept. 1998.

  • A. O. Hero and H. Hadinejad-Marham
    "Digital Modulation Classification Using Power Moment Matrices,"
    Proceedings of the IEEE 1998 Conf. on Acoustics, Speech and Signal Processing , Seattle, May 1998.

  • I. Sharfer and A. O. Hero
    " Optimal CDMA multiuser decoder using grouped coordinate ascent and the DWT,"
    Proceedings of the IEEE 1997 Workshop in Signal Processing Advances in Wireless Communications, Paris, April 1997.

  • I. Sharfer and A. O. Hero
    "A maximum likelihood CDMA receiver using the EM algorithm and the discrete wavelet transform,"
    Proceedings of the IEEE 1996 International Conference on Acoustics, Speech and Signal Processing , Atlanta, pp. 1602-1605, May 1996.

  • D. L. Goeckel, A. O. Hero, and W. E. Stark
    "Blind channel identification for direct sequence spread spectrum systems,"
    Proceedings of 1995 IEEE Conference on Military Communications , Los Angeles, Nov. 1995.

  • I. Sharfer and A. O. Hero
    "Spread spectrum sequence estimation and bit synchronization using an EM-type algorithm,"
    Proceedings of the IEEE 1995 International Conference on Acoustics, Speech and Signal Processing , Detroit, pp. 1864-1867, May 1995.

  • A.O. Hero
    "A rate distortion lower bound on phase errors for optical receivers,"
    Proceedings of Twentieth Conference on Information and Systems Science, pp. 140-145, Princeton, NJ, March 1988.

    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: