| Title |
Design and Characteristic Evaluation of Extended BFN for Improvement of Self-interference Cancellation Performance |
| Authors |
김명기(Myunggi Kim) ; 안창영(Changyoung An) ; 유흥균(Heung-Gyoon Ryu) |
| DOI |
https://doi.org/10.5573/ieie.2019.56.4.13 |
| Keywords |
IBFD ; In-band full duplex ; Balanced feed network ; Self-interference cancellation ; Spectral efficiency |
| Abstract |
5G mobile communication technology requires three times higher spectral efficiency than existing technologies. So research is being actively conducted to improve spectral efficiency to meet spectral requirements. Using In-Band Full Duplex (IBFD) can theoretically improve spectral efficiency by a factor of two. However, since Self-Interference (SI) occurs in IBFD, the performance of Self-Interference Cancellation (SIC) is very important. In this paper, we design and evaluate the extended Balanced Feed Network (BFN) for improving the performance of SIC. In this paper, the performance is evaluated based on the center frequency of 2.45GHz to evaluate the SIC performance. Simulation results show that the SIC performance is ?77dB, which is about 3dB better than the conventional Double-BFN. However, it was confirmed that the transmission power was reduced by 3dB compared with the conventional system. |