Method and device for feeding back signal path information of subband

[0019] In the embodiment of the present invention, the channel information feedback method is pre-agreed when the service negotiation (including initial access and communication initiation) is performed between the transmitting end and the receiving end, so that there is no need to notify through signaling between the transmitting end and the receiving end , and there is no need to feedback the sequence numbers of the subbands.

[0020] First, the feedback method of channel information in the embodiment of the present invention is described, see figure 1 As shown in , it is a schematic diagram of a channel information feedback method in an embodiment of the present invention, specifically including:

[0021] Step 101. At at least one moment, determine the difference information between the current channel information of at least one subband and the channel information at the previous feedback moment;

[0022] Step 102, feeding back the difference information.

[0023] When feed