About the Authors

Graciano Dieck Kattas

† Deceased.

Affiliation Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

Xiao-Ke Xu

xiaokeeie@gmail.com (XKX); michael.small@uwa.edu.au (MS)

Affiliations Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, School of Communication and Electronic Engineering, Qingdao Technological University, Qingdao, China

Michael Small

xiaokeeie@gmail.com (XKX); michael.small@uwa.edu.au (MS)

Affiliations Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, School of Mathematics and Statistics, University of Western Australia, Crawley, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GDK XKX MS. Performed the experiments: GDK. Analyzed the data: GDK XKX MS. Contributed reagents/materials/analysis tools: GDK XKX MS. Wrote the paper: GDK MS.