| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately detect the peak phase of each transmitting station with a small arithmetic quantity. SOLUTION: A correlation calculation part 103 calculates a correlation value from the base band signal from a radio reception part 102. A delay profile generation part 105 generates a delay profile from the correlation value from a selection part 104. A peak detection part 106 detects a peak correlation value and a peak phase from the delay profile and outputs the peak correlation value to a weighting part 109 and also outputs the peak phase to a correlation phase adjustment part 107 and a demodulation control part 111. A correlation storage part 108 calculates the autocorrelation value of a known spread code and outputs it to the correlation phase adjustment part 107. The autocorrelation phase adjustment part 107 adjusts the phase of the autocorrelation value of the spread code according to the peak phase, and the weighting part 109 adjusts the amplitude of the spread code autocorrelation value after the phase adjustment according to the peak correlation value. A correlation removal part 110 removes the spread code autocorrelation value after the phase adjustment from the correlation value.</p> |
