| 摘要 |
PURPOSE:To shorten the time when a synchronizing burst is synchronized with a synchronizing window by limiting the weighting and threshold value decision processing of each symbol to a part corresponding to the rear area of a metatic pattern after the synchronizing burst enters a normal synchronism state. CONSTITUTION:Threshold value decision circuits 27-1-27-m2 corresponding to respective symbols output m2 ternary identification values to a symbol timing decision circuit 28; and the time position of the metric pattern is detected in the rear area and specific reference symbol length and time variation are extracted to output a corresponding error voltage as a phase error voltage. This voltage is sent to a metric pattern phase controller to control the phase of the synchronizing burst signal generated by a synchronizing burst generating circuit, thus making an adjustment so that the phase error voltage is zero. Consequently, a time-division multiaccess TDMA frame is generated and maintained. |
