The signal processing apparatus, signal processing method and a receiving apparatus

The present invention relates to a signal processing apparatus, signal processing method and a receiving apparatus, which can use the response information detected with high accuracy from the carrier signal in accordance with information in response to load modulation. Positive DC generation section (61) generates a positive threshold value of the load modulated carrier signal. Positive selection portion (62) obtained by the large value of the output voltage of the positive threshold value to the addition of the carrier signal portion (65). Negative DC generation section (63) generates a negative threshold based on the load modulation of the carrier signal. Small value of the output voltage obtained by the comparison with a negative threshold signal carrier negative selection portion (64) to the addition portion (65). And a negative output selection portion (64) of the addition section (65) the positive selection portion (62) are added, and outputs the added result to the IQ detection section (53). As a result of the addition is obtained less than the original carrier signal and maintains Vpp voltage fluctuation signal portion. The present invention may be applied to non-contact communication system.