Method for selecting cyclic shift diversity sequence, and related apparatus

A method for sending a frame by using a cyclic shift diversity (CSD) sequence, comprising:

• generating a frame, wherein the frame comprises a first data subframe conforming to a first communication mechanism and a second data subframe conforming to the first communication mechanism;
• and
• sending the frame, wherein the first data subframe and the second data subframe are sent by using a cyclic shift diversity sequence including a plurality of CSD values,
• wherein a quantity of the plurality of CSD values in the cyclic shift diversity sequence is equal to a quantity of target transmit antennas, the quantity of target transmit antennas is larger than 8, and the cyclic shift diversity sequence is one of [0, −187.5, −12.5, −1.75, −25, −162.5, −75, −112.5, −200], [0, −187.5, −12.5, −175, −25, −162.5, −37.5, −112.5, −75, −200], [0, −187.5, −12.5, −175, −25, −162.5, −50, −137.5, −87.5, −112.5, −200], [0, −187.5, −12.5, −175, −37.5, −150, −50, −125, −75, −112.5, −100, −200], [0, −187.5, −12.5, −175, −37.5, −162.5, −50, −137.5, −62.5, −125, −87.5, −12.5, −200], [0, −187.5, −12.5, −175, −25, −150, −37.5, −137.5, −50, −125, −62.5, −112.5, −87.5, −200], [0, −187.5, −12.5, −175, −25, −162.5, −50, −150, −62.5, −112.5, −75, −125, −87.5, −100, −200], or [0, −187.5, −12.5, −175, −25, −162.5, −37.5, −150, −50, −137.5, −62.5, −125, −75, 100, −87.5, −200)].