| 摘要 |
<p>PROBLEM TO BE SOLVED: To separately detect a reception pulse signal for each radio wave transmission source effectively even if a pulse signal is received from a plurality of radio wave transmission sources simultaneously or even if a pulse train with an irregular interval of arrival of the pulse signal is received. SOLUTION: A pulse signal being received via an input antenna 1 is converted to a specific IF frequency by a frequency conversion circuit 2, and the amplitude value of a reception pulse signal being converted to the specific IF frequency is converted from analog to digital in time series at a frequency that is at least five times faster than the IF frequency by a high-speed A/D conversion circuit 3. Time-series envelope curve data are detected for each reception pulse signal based on the amplitude value of the reception pulse signal being converted from analog to digital via a DRFM(digital RF memory) by an envelope data detection circuit 6, and the time-series envelope data are correlated via an envelope data storage memory 8 by a cross-correlation circuit 9, thus judging that the signals are transmitted from a same source when the degree of correlation is equal to or more than a specific value and storing the data in a pulse data memory 10 for each transmission source.</p> |
