Estimate of the length of the channel impulse response

摘要

In the receiver for processing the OFDM coded signal is transmitted using the symbol at subcarrier frequency channels each contain user data symbols, OFDM encoded digital signal, the channel frequency response of the sub-carriers of at least some The initial estimate is formed from magnitudes of user data symbols received in those subcarriers. So, then, be estimated by performing an inverse Fourier transform on the initial estimate of the channel frequency response, the length of the channel impulse response, the peak of the correlation function of the estimated channel impulse response correlation function of the channel impulse response It is estimated by examining.