Patent ID: 8655297
Filing Date: 2014-02-18
Classification: H04B,H04L

Abstract:
1. A nonlinear distortion compensation receiver comprising: a sampling mixer that samples an input signal by frequency-converting and band-limiting the input signal; a correction filter that has an inverse characteristic of a frequency characteristic of the sampling mixer, corrects the frequency characteristic of a signal that is sampled by the sampling mixer, and outputs the corrected signal as a correction signal; a main signal extracting section that extracts a main path signal including a frequency band component of a desired wave from the correction signal; a replica signal generation section that extracts a frequency band component of an interfering wave from the correction signal as a replica path signal, and generates a replica signal of a nonlinear distortion component generated in the sampling mixer by using the frequency band component of the extracted interfering wave; an adaptive filter that performs adaptive filter processing to the replica signal with updating a filter coefficient; and a subtraction section that subtracts an output signal of the adaptive filter from the main path signal extracted by the main signal extracting section and outputs a subtracted result as a desired wave signal, wherein the adaptive filter updates the filter coefficient based on an output signal of the subtraction section.