| 摘要 |
<p>PROBLEM TO BE SOLVED: To carry out high performance computing for input signal frequency modulation determination, a chirp inclination (frequency fluctuation ratio), the number of encoding phase modulation bits and the like without causing any frequency error due to temperature fluctuation. SOLUTION: This frequency modulation data determination device is provided with a DRFM circuit sampling an input signal and storing a digital amplitude value measured by this sampling, a reading circuit sequentially reading the digital amplitude values stored in the DRFM circuit and outputting them in time sequence, an amplitude memory circuit storing the digital amplitude values outputted from the reading circuit in time sequence, and a frequency modulation data computing circuit determining frequency modulation data of the input signal on the basis of the digital amplitude values stored in the amplitude memory circuit.</p> |
