Communication method based on circular distribution, first communication device, second communication device, communication system, and computer-readable recording material

Abstract

The invention addresses communication methods based on cyclical diversity, equipment, and systems to improve system capacity and spectral performance, and also reduce the error in AUC gain setting. The method includes: The first communication device creates a physical layer protocol data unit (PPDU), where the PPDU includes a short training field (STF), a long training field (LTF), and a data field: cyclic shift performed on at least one of the STF, LTF, and cyclic shift diversity (CSD); The CSD consists of L elements, and L is the maximum number of spatial streams supported by the first communication device; and the maximum number of spatial streams is greater than 8. The first communication device sends PPDU to the second communication device.