Errors Analysis of Spectrum Inversion Methods

Two kinds of spectrum inversion methods are investigated. One is analog mixing method; another is digital undersampling method, which is put forward in this paper. In order to prove the digital undersampling method is better than the analog mixing method. The error models of these two methods are set up. Based on the error models, simulation experiments are carried out. The results prove that the digital undersampling method is of much more precision than the analog mixing method.