Signal design to transmit binary information of unequal importance

摘要: A method to construct and detect a binary transmit signal is disclosed. The based on the assumption that certain decision errors are less severe than other errors, as e.g. in transmission schemes employing ARQ. To this purpose, important information (e.g. acknowledgement ACK) transmitted with high power, whereas non-acknowledgement NACK) reduced power. An asymmetric modulation scheme obtained. detection threshold decide at receiver which of two signals was chosen such reliability detected ACK higher NACK signal. has advantage average power consumption decreases further multi-user CDMA systems interference reduced.