Method and apparatus for feeding back information about channel between antenna arrays

A method for feeding back information about a channel between antenna arrays, comprising:

• generating, by a second network device, sub-channel channel information of N×M sub-channels of the channel between an antenna array of a first network device and an antenna array of the second network device, wherein the antenna array of the first network device comprises M subarrays, the antenna array of the second network device comprises N subarrays, and M and N are positive integers and M and N are not to be 1 at the same time;
• sending the sub-channel channel information of the N×M sub-channels to the first network device, so that the first network device generates channel information of the channel between the antenna array of the first network device and the antenna array of the second network device according to the sub-channel channel information of the N×M sub-channels;
• and
• receiving, by the second network device, subarray configuration information sent by the first network device, wherein the subarray configuration information is used to divide the antenna array of the first network device into the M subarrays, and M is a positive integer greater than or equal to 2 and the M subarrays and the N subarrays each comprise at least two antennas.

An apparatus for feeding back information about a channel between antenna arrays, comprising:

• a processor and a non-transitory computer-readable medium storing instructions that are executable by the processor, wherein the processor is configured to:
• receive sub-channel channel information of N×M sub-channels that is sent by a second network device, wherein an antenna array of a first network device comprises M subarrays, an antenna array of the second network device comprises N subarrays, a channel between the antenna array of the first network device and the antenna array of the second network device comprises the N×M sub-channels, M and N are positive integers and M and N are not to be 1 at the same time;
• generate channel information of the channel between the antenna array of the first network device and the antenna array of the second network device according to the received sub-channel channel information of the N×M sub-channels;
• and
• send subarray configuration information to the second network device, the subarray configuration information is used to divide the antenna array of the first network device into the M subarrays, and M is a positive integer greater than or equal to 2 and the M subarrays and the N subarrays each comprise at least two antennas.

An apparatus for feeding back information about a channel between antenna arrays, comprising:

• a processor and a non-transitory computer-readable medium storing instructions that are executable by the processor, wherein the processor is configured to:
• generate sub-channel channel information of N×M sub-channels of the channel between an antenna array of a first network device and an antenna array of a second network device, wherein the antenna array of the first network device comprises M subarrays, the antenna array of the second network device comprises N subarrays, and M and N are positive integers and M and N are not to be 1 at the same time;
• send the sub-channel channel information of the N×M sub-channels to the first network device, so that the first network device generates channel information of the channel between the antenna array of the first network device and the antenna array of the second network device according to the sub-channel channel information of the N×M sub-channels;
• and
• receive subarray configuration information sent by the first network device, wherein the subarray configuration information is used to divide the antenna array of the first network device into the M subarrays, and M is a positive integer greater than or equal to 2 and the M subarrays and the N subarrays each comprise at least two antennas.