1. Department of Electronics and Information EngineeringHarbin Institute of TechnologyHarbinPeople's Republic of China
2. Key Laboratory of Marine Environmental Monitoring and Information ProcessingMinistry of Industry and Information TechnologyHarbinPeople's Republic of China
3. DIEIUniversitá di Cassino e del Lazio MeridionaleVia Di Biasio and ELEDIA@UniCASCassinoItaly