| 摘要 |
<p>PURPOSE:To shorten the pull-in time by using an output of an intermediate frequency amplifier as a self-correlation function of a reception signal and allowing it to execute the same operation as a matched filter. CONSTITUTION:By using two kinds of artificial random signals scarcely having a mutual correlation to each other, a signal of a radio format generated by a double phase orthogonal modulation of '0' and pi, a balanced orthogonal modulation or a phase modulation of 4 phases is transmitted. In order to demodulate this transmitting signal 11, an artificial signal being orthogonal to two kinds of artificial random signals, respectively is used, and by performing a necessary processing, an error signal is obtained. By bringing this error signal to feedback to a demodulation signal generating part 70b, it is performed to shorten the pull-in time and to extend effectively the artificial random signal to a long period.</p> |
