| 摘要 |
<p>PURPOSE:To enable a demodulating side to obtain original information data even if the existence of the correlation peak of the output waveform of a correlator is not clear by determining the correlation value of a spreaded spectrum signal and each PN system, and simultaneously, comparing them with each other, and outputting a state value corresponding to the PN system to make a maximum value. CONSTITUTION:Correlating means H0, H1 to determine the correlation values between the spreaded spectrum signal and each of two PN systems, means B0, B1 to generate the absolute value signal of the correlation value for every correlating means, the means 9 to generate the signal of the sum of all the generated absolute value signals for every correlating means, and the means 11 to extract the signal velocity period signal of the information data from said summed signal are provided. Besides, the means 14 to output the difference of the levels of the absolute value signals generated for every correlating means at timing based on the period signal is provided. Thus, even if the existence of the correlation peak can not be detected clearly from the output signal of the correlator, the original information data can be obtained.</p> |
