PURPOSE: To exactly demodulate received information data by outputting a correlation output signal in which a peak value is clear from two moving average parts.
CONSTITUTION: A correlation value between compensated data from a transmission function compensating part 9 and a first PN system PN0 is computed and outputted by a first correlator 1, and the correlation value between the pertinent compensated data and a second PN system PN1 is computed and outputted by a second correlator 2. The squared values of those output signals are obtained by first and second squaring circuits 4 and 5, and inputted to first and second moving average parts 6 and 7. The total sum by each 5 bit is searched and outputted by the first and second moving average parts 6 and 7, so that the correlation output signal in which the peak value is clear can be outputted even when the correlation output signal in which several peak points are present and their positions are shifted is inputted. Those signals are compared by a comparator 3, and received data are demodulated by a flop flop 12 based on the compared result and a synchronizing point signal from a synchronizing point detecting part 10.
UMEDA TAKASHI
WAKIMOTO OSAMU
TERAOKA TOMOZOU
MATSUNO TATSUJI
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