Full-rate and full-diversity space-time coding/decoding method

The invention discloses a full-rate and full-diversity space-time coding/decoding method. In the method, a receiving end determines a precoding parameter of an emission end according to channel information, quantizes the parameter to obtain a quantized value of the parameter and feeds serial number of the quantized value in a quantization codebook back to the emission end; and the emission end carries out precoding on a full-rate and full-diversity space-time code according to the received feedback information. When in decoding, the receiving end respectively decodes a real component and a virtual component of a modulation signal. Compared with a traditional full-rate and full-diversity space-time coding/decoding scheme, by virtue of the method disclosed by the invention, lower decoding complexity is achieved while the same reliability is kept.