Brian Chen.Also issued as Thesis (M. S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.Includes bibliographical references (p. 103).Supported in part by the Dept. of the Navy, Office of the Chief Naval Research. N0014-93-1-0686 Supported in part by the Advanced Research Projects Agency's RASSP program. N00014-95-1-0834 Supported in part by a National Defence Science and Engineering Graduate Fellowship.