Optimizing the Performance of Wideband Zero-IF Receivers

November 01, 2012 // By Electronics EETimes

The zero-IF receiver architecture gains popularity in wireless applications because of its suitability to demodulate very wideband RF signals. This capability is important in digital pre-distortion (DPD) transmitters. Realization of sufficient dynamic range is commonly known to be a major issue of zero-IF architectures. DC offsets and second-order intermodulation products are both co-located in frequency with the signal of interest and therewith reduce the receiver sensitivity.