US 2008/0304553 A1 · Method and Device for Removing Narrow Band Interference in Spreading Frequency System

Abstract

A method and device for eliminating narrow-band interference in spread spectrum system, wherein the method comprises the steps of: extracting N sampling points of the data to perform frequency spectrum transform each time and obtaining N points of data; getting the energy sum of individual data after M times of transform, obtaining N energy values, in which M≧1; removing partial excessive large values from N energy values and averaging the rest, then calculating the threshold value for interference determination based on the average value; obtaining the identification information of the points that have energy values exceeding the threshold value from N energy values and performing interference suppression for the data of corresponding points after frequency spectrum transform and finally outputting the data after frequency spectrum inverse transform. The device comprises a frequency spectrum transform unit, an interference elimination unit, an interference elimination control unit and a frequency spectrum inverse transform unit. The present invention could exactly distinguish interference data from non-interference data and effectively suppress narrow-band interference.

Claims19

Dependent claims

A method for eliminating narrow-band interference in a spread spectrum system, comprising the following steps of:

(A) extracting data of N sampling points to perform frequency spectrum transform each time and obtaining transformed data of N points;
(B) for the N sampling points, getting an energy accumulation of individual data after transform for M times and obtaining N energy values, wherein M is an integer greater than or equal to 1;
(C) removing partial excessive large values from said N energy values and averaging remaining energy values to get an average value, calculating a threshold value for interference determination based on the average value;
(D) comparing said N energy values with the threshold value, and obtaining identification information of all points that have energy values exceeding the threshold value;
(E) based on the identification information of said points, performing interference suppression for the data of corresponding points after frequency spectrum transform, performing frequency spectrum inverse transform for processed data and then outputting.

2 more elements

A device for eliminating narrow-band interference in a spread spectrum system, characterized in that it comprises a frequency spectrum transform unit, an interference elimination unit, an interference elimination control unit and a frequency spectrum inverse transform unit, wherein:

said frequency spectrum transform unit is used to perform frequency spectrum transform for one-time-extracted N sampling points of data and output transformed data to the interference elimination unit and the interference elimination control unit;
said interference elimination unit is used to perform interference elimination processing on data of points based on identification information of these points output from the interference elimination control unit and then send processed data to the frequency spectrum inverse transform unit;
said frequency spectrum inverse transform unit is used to perform frequency spectrum inverse transform for the data output from the interference elimination unit and then output them;
said interference elimination control unit is used to get an energy accumulation of individual data after transform for M times for the N sampling points to obtain N energy values (M≧1), remove partial excessive large values and average remaining energy values to get an average value, compute a threshold value based on the average value and compare the threshold value with the N energy values, and then output the identification information of the points that have energy values exceeding the threshold value to the interference elimination unit.

1 more element

Dependencies are inferred from the claim text.

Method and Device for Removing Narrow Band Interference in Spreading Frequency System

Life of this patent

Method and Device for Removing Narrow Band Interference in Spreading Frequency System

Life of this patent

Abstract

Claims19