Method of removing DC offset for a ZIF-based GSM radio receiver with digital frequency offset correction

摘要

Disclosed is a method and apparatus for removing DC offsets in a ZIF radio device, the method including the steps of converting an analog signal to digital samples, calculating a DC offset by capturing at least an entire burst of the digital samples removing the DC offset from the captured digital samples, rotating out frequency error from the captured digital samples, and performing channel filtering of the rotated digital samples.