公开(公告)号：US09048930B2

公开(公告)日：2015-06-02

申请号：US13854675

申请日：2013-04-01

Applicant: Applied Micro Circuits Corporation

Inventor： Dariush Dabiri

IPC: H04B3/46

CPC classification number: H04B3/46 ,  H04B17/345

Abstract: One or more processing units are programmed to select from among M tones in a frequency domain representation of a signal, a set of tones including at least a strongest tone (relative to background noise) and a tone adjacent thereto. From among M complex numbers in the frequency domain representation of the signal, a set of complex numbers are identified and denoted as a vector Z, corresponding to the selected set of tones. Vector Z is then multiplied with each of M columns of a matrix G which is predetermined to identify a sub-resolution maxima in Z. The M products that result from the vector multiplication of Z and G are used to determine and store in memory at least one or both of: (A) a flag indicating presence or absence of narrowband interference in the signal; and (B) an estimate of a frequency of the narrowband interference.

Abstract translation: 一个或多个处理单元被编程为在信号的频域表示中从M个音调中选择一组音调，其包括至少最强音（相对于背景噪声）和与其相邻的音调。 在信号的频域表示中的M个复数中，识别一组复数，并将其表示为对应于所选择的一组音调的向量Z。 然后将向量Z乘以预定的矩阵G的每个M列，以标识Z中的子分辨率最大值。由Z和G的矢量相乘产生的M个乘积至少用于确定和存储在存储器中 一个或两个：（A）指示信号中存在或不存在窄带干扰的标志; 和（B）对窄带干扰的频率的估计。