1. Department of Electrical Engineering, Universidad de Chile, Santiago 8370451, Chile
2. Escuela de Informática y Telecomunicaciones, Universidad Diego Portales, Santiago 8370190, Chile
3. Department of Electrical Engineering, Universidad de Santiago de Chile, Santiago 9170124, Chile
4. School of Engineering, Manchester Metropolitan University, Manchester M15 6BH, UK
5. School of Technologies, Universidad Tecnológica Empresarial de Guayaquil, Guayaquil 090511, Ecuador