| 摘要 |
<p>PROBLEM TO BE SOLVED: To generate a synchronization signal without using any matched filter or the like from a reception signal by receiving a packet signal where a plurality of known repetition signals is added to the top. SOLUTION: The I component of the reception signal is delayed by a delay 211 for the period (16T) of the repetition signal, the difference between the delayed signal and a signal that is not delayed is obtained by a subtraction part 212, and the absolute value of the difference is obtained by an absolute value 213. Similarly, the absolute value of the difference between two continuous repetition signals is obtained from a subtraction 215 and an absolute value 216. The output of both the absolute values 213 and 216 is added by an addition 217, integration is made for a correlation section (16T) by a correlation section integral part 218, and further integration is made for a preamble section (16&m10T) by a preamble section integral part 219. Timing when the integral value is minimized is detected by a minimum value detection 220 and is outputted as a synchronization signal.</p> |
