Digitally assisted equalization of third-order intermodulation products in wideband direct conversion receivers

Edward A. Keehr, Ali Hajimiri
2009 International journal of microwave and wireless technologies  
An effective linearization technique capable of equalizing IM3 products resulting from an arbitrary out-of-band blocking scenario in a wideband direct conversion receiver is presented. IM3 products are regenerated in the RF analog domain of a low-power mixed-signal feedforward path and are used to cancel analogous signal terms in the original receiver at digital baseband via adaptive equalization. The composite SAW-less receiver achieves an improvement in effective IIP3 from 27.1 to þ5.3 dBm
more » ... er worst-case UMTS Region 1 blocking when the feedforward path is active.
doi:10.1017/s1759078709990341 fatcat:rvuu4vpb2ffvvexiwzy4th7nfu