Patent ID: 8824528
Filing Date: 2014-09-02
Classification: H04B,H04L

Abstract:
1. An apparatus for detecting spectrum inversion, comprising: a differential correlation value computing portion, after a present time axial symbol having a plurality of carriers is input, utilized to use the present time axial symbol and a previous time axial symbol to compute a plurality of differential correlation values individually corresponding to the carriers; and a controlling portion, utilized to use the differential correlation values computed by the differential correlation value computing portion, when a spectrum inversion status flag is not at a spectrum inversion state, to compute a sum of the differential correlation values of all pilot signals of the present time axial symbol through each integer frequency displacement within an integer frequency offset variation region, and to compute a correlativity value of the each integer frequency displacement thereby, and when spectrum inversion status flag is at the spectrum inversion state, after computing the sum of the differential correlation values of the all pilot signals of the present time axial symbol through the each integer frequency displacement within the integer frequency offset variation region, and after computing the correlativity value of the each integer frequency displacement thereby, to determine a maximal correlativity value among all the computed correlativity values, and to decide a value of the spectrum inversion status flag of the computed correlativity value which is determined as the maximal correlativity value thereby utilizing as a detection result signal, which is utilized to determine whether it is spectrum inversion or not, to output.