Patent ID: 6445713
Filing Date: 2002-09-03
Classification: H04B

Abstract:
A method for measuring a CDMA signal comprising:an orthogonal converting step for converting a digital signal to be measured into a first complex base band signal; a time base/frequency error estimating step for estimating a first signal delay value from said first complex base band signal and a diffusion code series and for estimating a first frequency error utilizing said estimated first signal delay value; a frequency error correcting step for correcting said first complex base band signal by said first frequency error and for shifting said first complex base band signal by said first signal delay value to obtain a second complex base band signal; a reference signal creating step for creating a reference signal from said second complex base band signal and a diffusion code series; a parameter estimating/correcting step for estimating and correcting a parameter from said second complex base band signal and said reference signal to obtain a third complex base band signal; and a measurement item calculating step for calculating a measurement item from said third complex base band signal and said reference signal.