Semantic communication method and system based on unified semantic transmission index feedback adjustment

The embodiment of the invention provides a semantic communication method and system based on unified semantic transmission index feedback adjustment. The method comprises the following steps: receiving a semantic symbol sent by a semantic transmitter; demodulating the semantic symbol to obtain a received characteristic value; determining a wireless semantic transmission performance index based on the received feature value and the feature value extracted from the source data; and sending a feedback message to the semantic transmitter based on the wireless semantic transmission performance index, and retransmitting data by the semantic transmitter according to the feedback message in a mode of combining high-level and low-order modulation. According to the semantic communication method and system based on unified semantic transmission index feedback adjustment provided by the embodiment of the invention, a unified wireless semantic transmission performance index is provided and is used for evaluating the trans