| 摘要 |
PURPOSE:To prevent performance in the detection of an identification point when a radio wave state in the neighborhood of a synchronous word from being deteriorated in the transmission of data provided with well-know synchronous word and pilot symbol. CONSTITUTION:The estimation value 24 of the pilot symbol and a frequency offset estimation value 25, a square sum 26 of error of one symbol in the neighborhood of the minimum point are found from the minimum point of a square sum of error by a minimum point detector 23. The reception phase 30 of a signal in the neighborhood of the pilot symbol is found by a reception phase calculator 29, and the frequency offset of the pilot symbol is found by a method of least squares by a error calculator 31, and a square sum 33 of error of a value in which a reception phase is corrected and the well-know pilot symbol is found, and a square sum 35 of error of one symbol in the neighborhood of the minimum point is found by a minimum point detector 34. An identification point can be detected from the square sum 26 of error of the synchronous word and the square sum 35 of error of the pilot symbol by an identification point detector 36. |
