METHOD AND DEVICE FOR MAPPING SPATIAL STREAM TO SPACE TIME STREAM, AND DATA TRANSMISSION METHOD AND DEVICE

摘要

A method and device for mapping a spatial stream to a space-time stream, and a method and device for transmitting data are provided in the present invention. The mapping method includes: determining, according to a space-time encoding indication bit in a network, whether to adopt space-time encoding (S102); if it is determined to adopt space-time encoding, mapping M OFDM symbols carried by the nth spatial stream to OFDM symbols carried by the (2n-1)th and 2nth space-time stream respectively, n = 1, 2, ..., N, N is the total number of spatial streams in the network, M is the number of OFDM symbols carried by each spatial stream, and M is an even greater than zero (S 104). Applying the present invention, the problem that there is no specific method for mapping spatial stream to space-time stream using space-time encoding in a typical 802.11ac ultrahigh throughput WLAN system can be solved.