Patent ID: 9660673
Date: 2017-05-23
CPC Classifications: H03D,H04B,H04L

Claim:
1. An apparatus for canceling inter-modulation (IM) products in a transceiver, comprising: a pre-distortion circuit configured to estimate a first IM product caused by a transmission signal and pre-distort the transmission signal to cancel the first IM product, wherein the first IM product is produced in a transmission signal path; an IM product calculator configured to calculate a second IM product caused by the transmission signal in a first received signal based on the first IM product, wherein the second IM product is produced in an antenna front end and a reception signal path; and a subtractor configured to subtract the second IM product from the first received signal, wherein the pre-distortion circuit is configured to estimate, during a training period, a reference IM product caused by a reference transmission signal, and the IM product calculator is further configured to: