Blind Channel Estimation Based Approach for 5G Interference Canceling at Satellite Ground Stations

With the allocation of C-band frequencies for Fifth-Generation (5G) networks, in-band interference caused by 5G signals on satellite ground stations operating in the same band has become a serious concern. In the case of the interference caused by the Synchronization Signal Blocks (SSBs), the information carried in the SSBs can be used to improve the interference cancellation. Most importantly, the pilot symbols in the SSBs can be used to estimate the channel and initialize the interference cancellation filter. In the case of user signals, however, the pilot symbols are user specific and therefore they are unknown at the Satellite Ground Station (SGS). Due to this reason, the interference cancellation approach at the SGS needs to resort to blind channel estimation algorithms. In this paper, we present an interference cancellation method for the 5G user signals based on a blind channel estimation technique.