抄録
In this report, at first, an algorithm for CT based on the MAP (maximum a posteriori) estimation is derived for the systems, and a matched filter with complex absolute detection is introduced for the optimal signal processor to be free from non-linear phase shift. Then, to reduce the measuring time, the Gold sequence P.R.K. (Phase Reversal Keying) is proposed to the signal, since it provide sharp autocorrelations and low cross-correlations, being useful for simultaneous time-of-flight identifications on many acoustic paths. Finally, the total performance of the proposed methods is illustrated.
