公开(公告)号：US09705539B2

公开(公告)日：2017-07-11

申请号：US14156238

申请日：2014-01-15

Applicant: Texas Instruments Incorporated

Inventor： Fernando A Mujica ,  Lei Ding

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H04B1/04 ,  H03F1/32 ,  H03F3/195 ,  H03F3/24

CPC classification number: H04B1/0475 ,  H03F1/3247 ,  H03F3/195 ,  H03F3/24 ,  H03F2200/451 ,  H03F2201/3212

Abstract: Embodiments of the invention provide a DPD system where the transmit reference signal is transformed, including sub-sampling, frequency translation, and the like, to match the feedback signal, which goes thru a similar transformation process, to obtain an error signal. The same transformation is applied to a system model, which may be Jacobian, Hessian, Gradient, or the like, in an adaptation algorithm to minimize error.