| 摘要 |
PURPOSE:To detect position of code error noise in block, by converting the signals of a block which consists of receiving signal system input a short time frequency spectrum and setting this spectrum as a specified value, debunchingly and inversely Fourier converting. CONSTITUTION:The receiving signal of several receiving signal systems is fed to a time window setter 1 and short time frequency spectrum for a block is calculated by debunching Fourier converter 2. Next, an amplitude spectrum is converted into a small constant value by a constant amplitude setter 3 and a frequency spectrum having the amplitude spectrum and a phase spectrum is converted into time waveform by a debunching inverse Fourier converter 4. The absolute value of time waveform is obtained by an absolute value device 5. This absolute value waveform is fed to a detector of position 6 of code error noise and the maximum amplitude value of a block is detected. Then, the position is outputted as a position of code error noise. |
