Author Affiliations

C. L. Xu,^1,* W. P. Huang,^1,* C. Barnard,¹ J. Chrostowski,¹ and S. T. Chu^1,**

¹National Research Council of Canada, Institute for Information Technology, Ottawa, Ontario, Canada K1A 0R6

^*On leave from University of Waterloo, Department of Electrical and Computer Engineering, Waterloo, Ontario, Canada N2L 3G1

^**Yokohama National University, Division of Electrical and Computer Engineering, Yokohama, Knagawa 240, Japan