| 摘要 |
PURPOSE:To suppress an error which exerts influence on a result of signal processing, with regard to the amplitude limit processing circuit for limiting the amplitude of an input signal by preceding a signal processing, in a signal processor for performing a prescribed signal processing to a complex signal given by the vector sum of two orthogonal input signals. CONSTITUTION:In the amplitude limit processing circuit for limiting the amplitude of two input signals by preceding a signal processing of a complex signal, this circuit is constituted by providing an orthogonal-polar coordinate converting means 11 for converting an orthogonal coordinate for showing the amplitude of two input signals on a signal space to a polar coordinate and deriving the amplitude of the complex signal and a phase angle, an amplitude limiting means 13 for limiting the amplitude of the derived complex signal to the prescribed upper limit value or below, and a pole-orthogonal coordinate converting means 15 for generating two orthogonal output signals by performing a coordinate conversion processing being opposite to the orthogonal-polar coordinate converting means 11 to the limited amplitude and phase angle, and also, setting these output signals as an object of the signal processing. |
