1. Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong, SAR
2. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, SAR
3. Theory Laboratory, Central Research Institute, 2012 Labs, Huawei Technology Company Ltd.,, Hong Kong, China
4. Theory Laboratory, Central Research Institute, 2012 Labs, Huawei Technology Company Ltd.,, Shanghai, China
5. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR