Modified Uplink Adaptive Algorithm for PRACH on 5G-NR Systems
Seungmo Hong, Chonghoon Kim, Bobae Kim, Beomhee Jang, Donggeon Lee, Sungbin Im · 2020 International Conference on Electronics, Information, and Communication (ICEIC) · 2020
In a 3GPP-based system such as 4G-LTE and 5G-NR, a UE transmits a PRACH (Preamble Random Access Channel) signal in the initial connection with a base station. As a result, the interference canceling repeater suddenly receives a high-power narrow-band signal continuously in a no user signal state, so that the interference cancellation algorithm may malfunction and the system is likely to cause oscillation. In this paper, we propose an adaptive algorithm that can maintain the interference cancellation function without oscillation even for narrow band input with an abrupt change of the spectrum and power.