Delay profile analytical device and symbol synchronous manner

摘要

Abstract Topic Even with the OFDM transmission with segment mode, spiritWhen dense delay profile is calculated, simultaneously, huejinAccurate symbol synchronization is established even under environment of gu and the like. Solutions In 1st symbol synchronous circuit 16 windowu position to specify, in the FFT circuit 13 the OFDM signal Hurie after converting, frame synchronization is established. This time,At CP/DBPSK detection complex division circuit 19 frameThe CP signal and the DBPSK signal which is synchronous head symbolTo fetch the phase reference signal, in other carrier position zeroTo interpose, complex division doing making use of the known signal transmission path propertyIt seeks. This signal in IFFT circuit 18 converse fourier transformDelay profile is sought by doing. In addition, soOn the basis of delay profile, the 2nd symbol synchronous timeOn path 17 just the same or specified position as transmitting end FF which slipsThe T window is configurated.