1. School of Information Science and Engineering, Yunnan University, Kunming 650091, People’s Republic of China
2. Wireless Innovation Lab, Yunnan University, Kunming 650091, People’s Republic of China
3. Technology Center of China Tobacco Yunnan Industrial Co. Ltd. Kunming 65023, People’s Republic of China
4. Institute of Criminal Investigation, Yunnan Police College, Kunming, Yunnan 650223, People's Republic of China