| 摘要 |
PURPOSE:To perform accurate estimation, by measuring the repeated cycle and pulse width of a noise pulse when the noise pulse is detected in a noise monitor section to store the same in a memory circuit and using the measured results in the determination of the detection processing point of time. CONSTITUTION:The output of a receiving circuit 3 is inputted to a noise detec tion circuit 7 which in turn detects said output as noise when a signal is re ceived in a noise monitor section T2. When two noise pulses N1, N2 are detected in the section T2, the repeated cycle tau1 of the noise and the continuing time, that is, the pulse width tau2 thereof are measured. On the basis of the measured values, the next detection processable point A1 of time is determined and a transmitting circuit 2 is controlled on the basis of the result thereof. When the third noise pulse N3 is detected in the section T2, the previously measured results stored in a memory circuit 9 are used as the values of the repeated cycle tau1 and the pulse width tau2. By this method, so far as even one noise pulse is detected, accurate estimation is performed.
|
