1. Theory Laboratory, Central Research Institute, 2012 Labs, Huawei Technologies Company Ltd., Hong Kong, China
2. Information Coding and Transmission Key Laboratory of Sichuan Province, CSNMT Int. Coop. Res. Centre (MoST), Southwest Jiaotong University, Chengdu, China
3. Key Laboratory Information Coding and Transmission Key Laboratory of Sichuan Province, CSNMT Int. Coop. Res. Centre (MoST), Southwest Jiaotong University, Chengdu, China
4. Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China