Patent ID: 7197287
Filing Date: 2007-03-27
Classification: H03F,H04B

Abstract:
1. A transmitter configured to compensate for non-linearities of a transmission chain, the transmitter comprising: a first forming unit configured to form at least one time-domain compensation parameter vector; a second forming unit configured to form at least one frequency-domain compensation parameter vector; a determining unit configured to determine at least one set of signal properties modeling non-linearities in a transmission chain; a third forming unit configured to form, based on the at least one set of signal properties, at least one state expansion vector comprising quantities characterizing a signal; a modifier configured to modify the signal characterizing quantities of at least one state expansion vector with the at least one time-domain compensation parameter vector and with the at least one frequency-domain compensation parameter vector to form a pre-distorted signal; a fourth forming unit configured to form a feedback signal from an output signal of a transmission chain; a first adapter configured to adapt the at least one time-domain compensation parameter vector based on a residual error between a transmit signal and the feedback signal; and a second adapter configured to adapt the at least one frequency-domain compensation parameter vector based on the residual error between the transmit and the feedback signal.