| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital transmission system that revises a display range showing a guard period by means of a positional relation corresponding to a ghost state visualized signal waveform even when a GI (guard interval) length is revised or switched depending on a transmission state so as to be accurately graspable the transmission state with high quality. SOLUTION: A receiver side of the digital transmission system employing the multicarrier modulation system includes a transmission state video conversion means that generates at least a ghost state signal among the ghost state signal representing an intruded state of a reflection wave from a received signal, a BER (bit error rate) state signal denoting a bit error rate, and an electric field strength state signal representing the electric field strength, converts the state signal into a visualized signal and generates the visualized signal, and a means for displaying the visualized signal as an image on the basis of a prescribed display criterion, and the transmission state video conversion means includes a means for integrating the visualized signals denoting a guard period corresponding to the visualized signal in a ghost state at a prescribed positional relation and revising a display range of the guard period in response to the number of FFT (fast Fourier transform) points detected from the received signal. COPYRIGHT: (C)2005,JPO&NCIPI
|
