| 摘要 |
<p>PURPOSE: A channel estimation method for using FFT is provided to reduce the influence of the noise by applying the channel deduction technique of the FFT based. CONSTITUTION: A first N-pint FFT(110) changes a radio frequency signal received through antenna into the frequency area by performing FFT. A Pilot/Data subcarrier discriminator(120) discriminates the pilot subcarrier and data subcarrier in the transformed signal to the frequency area. A LS channel estimator(130) estimates the channel value of the corresponding pilot subcarrier as a LS mode. A N-point IFFT(140) changes the outputted result into the time area by being proceed IFFT. A N-point FFT(150) changes the outputted result into the frequency area by being proceed FFT. A channel compensator(160) compensates the data subcarrier by selecting the value with in the location of the Used subcarrier of outputs of the N-point FFT the virtual subcarrier.</p> |
