Patent ID: 7903717
Filing Date: 2011-03-08
Classification: H04B

Abstract:
1. A receiver comprising: a receiving unit that receives a radio wave signal transmitted from a transmitter by modulating a transmission signal after changing the number of multiple levels at a time of multi-leveling of the transmission signal according to a communication environment; a primary demodulation unit that converts the received radio wave signal into a digital signal having two or more levels by analog-to-digital conversion before demodulation thereof; a secondary demodulation unit that converts the received radio wave signal into a two-level digital signal of positive and negative levels before demodulation thereof; a selection unit that selects whichever has a higher intensity from the signal demodulated by the primary demodulation unit and the signal demodulated by the secondary demodulation unit; and a decoding unit that decodes the selected signal to acquire the transmission signal.