Analysis of interference cancellation under limited frequency band resources for B5G communication system application scenarios

In a bandwidth-constrained setting, precise self-interference cancellation in communication systems poses challenges. This research extends optical self-interference cancellation to propose an adaptive interference mitigation strategy tailored for advanced mobile communication systems beyond the fifth generation. By considering delay gains in reference and self-interference channels, along with multipath temporal aspects, an unconstrained optimisation algorithm is introduced. Additionally, an adaptive mitigation strategy for multipath channels is devised using orthogonal frequency-division multiplexing technology. Simulation experiments demonstrate the optimised algorithm's 29.82-38.15% reduced sampling energy consumption compared to alternatives. The self-interference cancellation strategy saves energy, achieving -30.02 dB detection depth. Post-cancellation, the signal spectrum's error vector magnitude is only 6.71%, a 71.72% decrease. The results highlight the effectiveness of this adaptive interference mitigation strategy in self-interference and multipath signal elimination in communication systems.