Patent ID: 9312892
Filing Date: 2016-04-12
CPC Classification: H03F,H04B

Claim Text:
1. A digital pre-distortion circuit capable of compensating for a non-linear characteristic of an analog circuit, comprising: a pre-distortion training circuit operable to process a digital feedback signal according to a modified Cholesky Decomposition algorithm and thereby generate a plurality of coefficients in which the digital feedback signal is derived from an output signal of the analog circuit and the output signal of the analog circuit is derived from an original digital signal; and a pre-distortion circuit, including the pre-distortion training circuit or being independent of the pre-distortion training circuit, operable to process the original digital signal according to the plurality of coefficients under a compensation mode and thereby generate a digital pre-distortion signal, wherein the non-linear characteristic of the digital pre-distortion signal is operable to compensate for the non-linear characteristic of the analog circuit and thereby make the output signal of the analog circuit conform to a predetermined characteristic, and the pre-distortion training circuit is operable to generate the plurality of coefficients through carrying out at least the following steps: