| 摘要 |
PURPOSE:To supply an accurate clock to a pseudo noise generator by using two series of modulation codes included in a received signal so as to execute a partial demodulation and mutually exchanging chip synchronizing signals included in the signal obtained by demodulating the obtained part between two series of routes. CONSTITUTION:The binarization data of outputs from binary quantizing means 20 and 22 is given to coherent integration means 24 and 26. Namely, by using the means of the coherent integration so as to successively monitor the code change of the data, the bit timing of a modulated code which remains after demodulating the part is detected. The chip synchronizing signals obtained in such a manner are mutually exchanged as the clock signals clk-2 and clk-1 and respectively given to faulse signal generators 14 and 12. Therefore, internally composite clocks given to the pseudo noise generator are given from the timing information of the modulation code bit included in the input signal, so that accurate synchronism can be attained. |
