| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably and accurately detect the moment of rising of a reception signal with a simple structure without depending on a change in environment. <P>SOLUTION: A communication device 1000 is comprised of a pseudo noise addition unit 40, an FM detection processing unit 50, an HPF unit 60, and a rising detection unit 90. The pseudo noise addition unit 40 adds pseudo noise to a complex envelope signal of a reception signal and outputs a complex envelope signal with pseudo noise. The FM detection processing unit 50 converts the complex envelope signal with pseudo noise output by the pseudo noise addition unit 40 into an FM signal and outputs the FM signal. The HPF unit 60 filters a high-frequency component of the FM signal output by the FM detection processing unit 50 and outputs a high-frequency signal. The reception signal detection processing unit 90 compares the amplitude of the high-frequency signal output by the HPF unit 60 with a preset prescribed threshold, and based on a result of this comparison, detects rising of the reception signal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
