METHOD AND APPARATUS FOR ELIMINATING NARROW BAND INTERFERENCE BY MEANS OF WINDOWING PROCESSING IN SPREAD SPECTRUM SYSTEM

摘要

A method and apparatus for eliminating narrow band interference by means of windowing processing in spread spectrum system, said apparatus comprises spectrum transformation unit, interference elimination unit, interference elimination controlling unit and spectrum inverse transformation unit. Said method comprises steps: taking out N sample point data each time to perform spectrum transformation, and achieving N point data; then updating the control information, comparing energy value with threshold value of N point in given period of time, and determining the number of narrow band interference as well as width and position of each narrow band interference; determining corresponding frequency domain adjusting window according to width and position of each narrow band interference, achieving point included in window and adjusting value of each point; when performing interference elimination processing, with regard to N point data which has been transformed, setting energy value of point included in each window of the period of time or the former period of time as corresponding adjusting value, then performing inverse spectrum transformation and being outputted. The method of the present invention can reduce the adverse effect of spectrum leakage to narrow band interference restraining ability.