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rfsystem said:That is an outdate method!
If the offset appears early in the gain path (natural with a ZeroIF mixer) the digital offset correction should have a dynamic range of the signal + offset*gain. More bad news are that the offset could clip some amplifiers in between. Some guys think about feeding back a DAC to the mixer output. It helps a little bit but there are more clever solutions by building mixed gain/offset correction blocks.
rfsystem said:Either
1. Use frequency domain filtering if the signal has zero DC like OFDM or Wideband FSK.
2. Disable your signal for the correction
Easy?