| 摘要 |
PURPOSE:To obtain a clock signal with superior C/N with a comparatively simple configuration. CONSTITUTION:A transmission part side is equipped with a means 20 which performs the angle modulation of a signal of information, etc., a frequency division means 25 which generates the cock signal by performing 1/N1-frequency division on an angle modulation wave, a means 48 which generates a spread code based on the clock signal, and a means 10 which outputs the angle modulation wave in the spread code by applying spread modulation, and a reception part side is equipped with means 3, 2, and 1 which obtain the angle modulation wave converted to an intermediate frequency by applying reverses spread by the multiplication output of the spread code and local oscillation output, means 6, 24, and 22 which obtain demodulation information by PLL-demodulating the angle modulation wave, a means 9 that beats up by the multiplication of the output of a VCO 22 in a PLL demodulation means and the local oscillation output, a frequency dividing means 26 which outputs beat-up output by applying frequency division by the numbers 1/N1 and 1/N2 of frequency division, respectively, a means 28 which generates a control signal for synchronous capture from the output of a phase comparator 6 in the PLL demodulation means, and a means Sw which selects the output of the frequency dividing means 26 by the control signal and supplies it to a spread code generator 4 for demodulation as the clock signal. |
