Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Fine FFT window position recovery apparatus of an OFDM system receiver
 A fine fast Fourier transform window position recovering apparatus of an OFDM system receiver for recovering the phase error of an FFT window by using the number of zero-crossings of the phase variation value calculated between transmitted and received complex values is provided. The fine FFT window position recovering apparatus includes: an analog to digital converter, a symbol start detector, an FFT means, a phase calculator, a zero-crossing counter and an FFT window controller. The apparatus makes it possible to guarantee the reliability of a system by adjusting the phase error of the FFT window by using the number of zero-crossings of the phase variation calculated between the transmitted and received complex values and the number of the zero-crossings of the amplitude of the real part or the imaginary part of the received complex value. 
Samsung Electronics Co., Ltd.
H H
H04L H04L
inventional inventional
Sang-hyun Hyung-jin Dong-kyu Myeong-hwan
Do Choi Kim Lee