SOFT INFORMATION TRANSMISSION-BASED UNDERWATER ACOUSTIC COMMUNICATION DATA REUSE METHOD

摘要

Disclosed is a soft information transmission-based underwater acoustic communication data reuse method, applicable to the field of underwater acoustic communication algorithm verification and data processing. According to the present invention, a probability likelihood function mapping approach is used to map any information bit to the existing data by means of a modulation constellation point. The existing data is equalized and decoded to obtain likelihood ratio information of the existing data bit. The likelihood ratio, i.e., soft information, of the existing data is mapped to the newly designed information bit by designing a mapping form so as to decode the new information bit by means of a decoding algorithm. According to the method of the present invention, on the basis of the existing real underwater acoustic data, the performance of any coding scheme applied to an underwater acoustic communication physical layer can be verified in a soft information mapping mode without making a secondary experiment, and theoretical innovation is achieved. The method of the present invention can also save huge consumption of manpower and material resources brought by underwater acoustic communication sea test experiments.