Interference Cancellation Technology for LEO Satellite Navigation Transceiver Channels Based on Joint Amplitude-Phase Optimization

Low Earth Orbit (LEO) satellites providing navigation augmentation services need to receive navigation signals broadcast by high-orbit satellites while simultaneously transmitting navigation enhancement signals to the ground, resulting in co-frequency interference between transmitted and received signals. This paper proposes an interference cancellation technology for LEO satellite navigation transceiver channels based on joint amplitude-phase optimization. The method designs an RF link with fine amplitude and phase adjustment capabilities, employs adaptive algorithms to drive parameter optimization, and constructs a hardware test platform to verify the effectiveness of the approach. The results demonstrate that this technology achieves over 40 dB suppression for single-frequency interference signals and over 30 dB suppression for spread-spectrum interference signals.