A Wideband Digital Compensation Model Based on Fast Bandwidth Sensing for Zero-IF Receiver

Zero-IF transceiver systems use digital compensation techniques to mitigate communication distortions and improve performance. However, receiver compensation models generally struggle to simultaneously handle both wideband and narrowband signals. This paper introduces a digital compensator model based on a sensing module to solve the aforementioned issues. The model quickly estimates the signal bandwidth at the receiver, allowing for the selection of precise compensation parameters. Simulation and experimental results conducted on a transceiver architecture with a sampling rate of 1.25 GSPS demonstrate that the proposed sensing model can rapidly estimate the approximate bandwidth of test signals, the normalized mean square error (NMSE) is optimized by approximately 3 dB on average across the 1 GHz frequency range.