## 6 Future Works  
There are many interesting factors that still remain and should be examined further in FD short-packet transmission and channel coding schemes, especially in the physical layer security area. The impacts of a higher order of modulation in FD short-packet transmissions need to be considered. Therefore, it is possible to expand this work to the non-binary LDPC codes, which are used to overcome the weakness of the binary codes in short code lengths and higher orders of modulation such as 16-QAM or 64-QAM [60]. In the near future, a Software-Defined Radio (SDR) implementation of the proposed algorithm will be developed in realistic transmission scenarios in order to evaluate its performance on real signals, especially for IoT applications and green communications. Furthermore, we would like also to evaluate the proposed algorithm combined with self-jamming techniques in the physical layer security area for FD short-packet transmissions with the presence of an eavesdropper. Last but not least, the theoretical and analytical approach for both the Cramer-Rao Lower Bounds (CRLBs) for channel estimation and also the lower bound of the BER will be considered in the near future.  
**Author Contributions:** Conceptualisation, B.Q.V., H.Q.T. and R.G.; methodology, B.Q.V., H.Q.T. and R.G.; software, B.Q.V.; validation, H.Q.T., A.F. and R.G.; formal analysis, B.Q.V., H.Q.T. and R.G.; investigation, B.Q.V., R.G. and H.Q.T.; resources, B.Q.V.; data curation, B.Q.V. and A.F.; writing--original draft preparation, B.Q.V. and H.Q.T.; writing--review and editing, B.Q.V., R.G., H.Q.T., L.L.N., A.F. and M.M.; visualisation, B.Q.V., H.Q.T. and L.L.N.; supervision, R.G. and M.M.; project administration, R.G.; funding acquisition, R.G., A.F. and M.M. All authors have read and agreed to the published version of the manuscript.  
**Funding:** This research was jointly supported by the Brest Institute of Computer Science and Mathematics (IBNM) CyberIoT Chair of Excellence at the University of Brest (UBO), and the Brittany region-Pole d'Excellence Cyber. It was also supported by the UBO grant \"Ph.D. Student International Mobility\" of Direction Europe and International (DEI) for three months mobility at the International University, Ho Chi Minh City, Vietnam.  
**Institutional Review Board Statement:** Not applicable.  
**Informed Consent Statement:** Not applicable.  
**Data Availability Statement:** The data presented in this study are available upon request from the corresponding author.  
**Acknowledgments:** The authors would like to thank the University of Brest (UBO), the Direction Europe and International (DEI), the Brest Institute of Computer Science and Mathematics (IBNM) CyberIoT Chair of Excellence, and the Brittany region-Pole d'Excellence Cyber for their funding. We also want to give a warm thank you to all staff and faculties at the School of Electrical Engineering in International University, Vietnam National University (HCMIU), Ho Chi Minh City, Vietnam, for their support regarding the documents and facilities during the Ph.D. Student International Mobility for three months. We also thank the Consulate of Vietnam in France and the Vietnam Airlines Joint Stock Company for their support regarding the airline ticket and entering process for Vietnam.  
**Conflicts of Interest:** The authors declare no conflict of interest.