| 摘要 |
PURPOSE:To attain the stable synchronizing holding in a spectrum communicating system with a good frequency using efficiency by detecting the maximum value of a matching filter output and using the time position to detect it as a transmitting signal system and a code word. CONSTITUTION:Only one period out of receiving signals composed of a continuous spread code is serially and parallelly converted, removed and held for one period. A matching film 5 with the held signal as an input changes hourly the coefficient so as to realize all patterns of a transmittable spread code, and counts the correlation concerning all assemblings of the receiving signal and the spread code. By detecting the time position in which the maximum value appears at the output of the matching filter 5, the transmitted information and the pattern of the diffusion code can be decided. A delaying locking loop 9, with the pattern of the decided spread code as a reference code, detects the correlation of the receiving signal to execute the one-code word period delaying and holds the period with the peak position. |
