Abstract
A method for feeding back information about a channel between antenna arrays is provided, which includes: receiving, by a first network device, channel information of N�M sub-channels that is sent by a second network device, where an antenna array of the first network device includes M subarrays, an antenna array of the second network device includes N subarrays, a channel between the antenna array of the first network device and the antenna array of the second network device includes the N�M sub-channels, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each include at least two antennas; and generating 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 channel information of the N�M sub-channels that is from the second network device.
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5G | 25/12/2017 | ISLD-201711-019 | HUAWEI |
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WO2016183803A1 | 5G | 25/12/2017 | ISLD-201711-019 | HUAWEI |
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WO2016183803A1 | 5G,4G,3G | 25/12/2017 | ISLD-201711-019 | HUAWEI | Yes | Basis Patent | ||||
CN107615677A | 5G | 25/12/2017 | ISLD-201711-019 | HUAWEI |
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KR20180005706A | 5G | 25/12/2017 | ISLD-201711-019 | HUAWEI |
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Claim
1. A method for feeding back information about a channel between antenna arrays, comprising:
receiving, by a first network device, channel information of a NxM sub-channels that is sent by a second network device, wherein an antenna array of the 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 NxM sub-channels, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each comprise at least two antennas; and generating 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 channel information of the NxM sub-channels that is from the second network device.
2. The method according to claim 1, wherein the method further comprises:
sending, by the first network device, subarray configuration information to the second 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.
3. The method according to claim 2, wherein the subarray configuration information comprises at least one pattern, and the M subarrays are determined according to the at least one pattern.
4. The method according to claim 2, wherein the subarray configuration information comprises a start port number of each subarray, and each of the M subarrays is determined according to the start port number.
5. A method for feeding back information about a channel between antenna arrays, comprising:
generating, by a second network device, channel information of NxM sub-channels of a 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, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each comprise at least two antennas; and sending the channel information of the NxM 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 channel information of the NxM sub-channels.
6. The method according to claim 5, wherein the channel information of the NxM sub-channels comprises a rank indicator RI and a precoding matrix indicator PMI, each of the NxM sub-channels corresponds to one sub-channel matrix, and the channel information of the NxM sub-channels is obtained according to the following steps:
obtaining autocorrelation matrices of channel matrices of the NxM sub-channels; and
obtaining the RI and the PMI of the NxM sub-channels according to the autocorrelation matrices of the channel matrices of the NxM sub-channels.
7. The method according to claim 5, wherein the channel information of the NxM sub-channels comprises precoding, each of the NxM sub-channels corresponds to one sub-channel matrix, and the generating, by a second network device, channel information of NxM sub-channels of a channel between an antenna array of a first network device and an antenna array of the second network device specifically comprises:
obtaining autocorrelation matrices of channel matrices of the NxM sub-channels; and
obtaining the precoding of the NxM sub-channels according to the autocorrelation matrices of the channel matrices of the NxM sub-channels.
8. The method according to claim 5, wherein the method further comprises:
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.
9. The method according to claim 8, wherein the subarray configuration information comprises at least one pattern, and the N subarrays are determined according to the at least one pattern.
10. The method according to claim 8, wherein the subarray configuration information comprises a start port number of each subarray, and the M subarrays are determined according to the start port number of each subarray.
11. An apparatus for feeding back information about a channel between antenna arrays, comprising:
a receiving module, configured to receive channel information of NxM 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 NxM sub-channels, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each comprise at least two antennas; and a processing module, configured to 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 channel information of the NxM sub-channels that is from the receiving module.
12. The apparatus according to claim 11, wherein a sending module is configured to 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.
13. The apparatus according to claim 12, wherein the subarray configuration information comprises at least one pattern, and the M subarrays are determined according to the at least one pattern.
14. The apparatus according to claim 12, wherein the subarray configuration information comprises a start port number of each subarray, and the M subarrays are determined according to the start port number of each subarray.
15. An apparatus for feeding back information about a channel between antenna arrays, comprising:
a processing module, configured to generate channel information of NxM sub-channels of a 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, M and N are positive integers and are not both 1, and the M subarrays and the N subarrays each comprise at least two antennas; and a sending module, configured to send the channel information of the NxM 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 channel information of the NxM sub-channels.
16. The apparatus according to claim 15, wherein the channel information of the NxM sub-channels comprises a rank indicator RI and a precoding matrix indicator PMI, each of the NxM sub-channels corresponds to one sub-channel matrix, and the processing module is specifically configured to:
obtain autocorrelation matrices of channel matrices of the NxM sub-channels; and
obtain the RI and the PMI of the NxM sub-channels according to the autocorrelation matrices of the channel matrices of the NxM sub-channels.
17. The apparatus according to claim 15, wherein the channel information comprises a precoding, each of the NxM sub-channels corresponds to one sub-channel matrix, and the processing module is specifically configured to:
obtain autocorrelation matrices of channel matrices of the NxM sub-channels; and
obtain the precoding of the NxM sub-channels according to the autocorrelation matrices of the channel matrices of the NxM sub-channels.
18. The apparatus according to claim 15, wherein the apparatus further comprises:
a receiving module, configured to 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.
19. The apparatus according to claim 18, wherein the subarray configuration information comprises at least one pattern, and the N subarrays are determined according to the at least one pattern.
20. The apparatus according to claim 18, wherein the subarray configuration information comprises a start port number of each subarray, and the M subarrays are determined according to the start port number of each subarray.
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