| 摘要 |
PURPOSE:To allow one correlation device to attain similar correlation processing to that when two correlation devices or over are in use by dividing a correlation processing enable band of the correlation device into two or over, applying different correlation of the signal to each band and separating correlation signals. CONSTITUTION:A reception signal is inputted to a reception side of a correlation device (convolver) 14 via a band pass filter 10 and an amplifier 15 and the correlation device 14 takes correlation between the reception signal and a modulated signal. A correlation processing band (signal input band) is divided on a frequency axis and the divided bands are used to take correlation of a correlation signal of independent spread signals and the correlation output signal is extracted separately at a frequency set to each band. Thus, the similar correlation processing is implemented to the case with two correlation devices or over by having only to use one correlation device 14 and occurrence of an error of a demodulation data due to noise or disturbance or the like is suppressed. |
