Abstract: A noise cancelling device includes an extracting unit configured to extract a first noise from a signal, the signal being based on an input audio signal, a storing unit configured to store noise characteristic information on a second noise, the second noise remaining after subtracting the extracted first noise from the signal based on the audio signal. And the device further includes a cancelling unit configured to perform cancelling processing for cancelling a noise on the input audio signal based on the first noise and the noise characteristic information on the second noise.

Abstract: The radio reception section 1102 receives a received signal whose band has been restricted using a filter. The delay profile creation section 1104 creates continuous delay profiles for every midamble shift. The distortion component creation section 1106 creates start path distortion components by multiplying the power value of the start sample of each midamble shift by a coefficient of the filter. The removing section 1107 removes the start path distortion components of the following midamble shift from predetermined samples behind the delay profile of each midamble shift. The path selection section 1108 selects samples whose power value is equal to or greater than a threshold as paths from the delay profile with the start path distortion components removed as paths.

Abstract: An SIR measuring apparatus capable of measuring an SIR after interference cancellation with a high degree of accuracy in a short time after its reception without performing JD demodulation. This apparatus creates a delay profile using midamble sections and measures the SIR using this delay profile and estimated path positions. That is, the signal power measuring section (142) measures signal power from the delay profile and the positions of the selected paths and the interference power measuring section (144) measures interference power from the delay profile and the positions of the selected paths. Then, the signal power correction section (146) and interference power correction section (148) perform necessary corrections and the SIR calculation section (150) calculates the SIR according to predetermined calculation formulas.