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US 12,009,898 B2Granted
Channel state information (CSI) with spatial and time domain compression
AssigneeQUALCOMM Incorporated
InventorsLiangming Wu, Chenxi Hao, Qiaoyu Li, Chao Wei, Wanshi Chen, Joseph Binamira Soriaga, Yu Zhang
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Abstract
Certain aspects of the present disclosure provide techniques for reporting channel state information (CSI) with spatial and time domain compression.
Claims27
A method of wireless communications by a first wireless communications device, the method comprising:
- receiving one or more signals from a second wireless communications device;
- determining a precoder matrix index (PMI) based on the signals;
- determining one or more parameters for performing a frequency domain compression of the PMI to select a first subset of a plurality of taps corresponding to a plurality of beams based on a time domain representation of the PMI in a first stage and to select a second subset of the first subset for each beam of the plurality of beams in a second stage;
- performing the frequency domain compression of the PMI according to the parameters;
- and
- transmitting information regarding the frequency domain compressed PMI to the second wireless communications device.
3 more elements
A method of wireless communications by a second wireless communications device, the method comprising:
- transmitting one or more signals to a first wireless communications device;
- receiving information regarding a frequency domain compressed precoder matrix index (PMI) from the first wireless communications device;
- determining one or more parameters used by the first wireless communications device for performing the frequency domain compression of a base PMI to select a first subset of a plurality of taps corresponding to a plurality of beams based on a time domain representation of the PMI in a first stage and to select a second subset of the first subset for each beam of the plurality of beams in a second stage;
- decompressing the frequency domain compressed PMI, based on the information and the determined parameters, to derive a decompressed PMI;
- and
- adjusting a configuration of one or more antennas of the BS based on the decompressed PMI.
3 more elements
An apparatus of wireless communications, the apparatus comprising:
- memory storing computer executable code thereon;
- and
- one or more processors coupled with the memory and configured to, individually or collectively, execute the computer executable code and cause the apparatus to:
- receive one or more signals from a second wireless communications device;
- determine a precoder matrix index (PMI) based on the signals;
- determine one or more parameters for performing a frequency domain compression of the PMI to select a first subset of a plurality of taps corresponding to a plurality of beams based on a time domain representation of the PMI in a first stage and to select a second subset of the first subset for each beam of the plurality of beams in a second stage;
- perform the frequency domain compression of the PMI according to the parameters;
- and
- transmit information regarding the frequency domain compressed PMI to the second wireless communications device.
6 more elements
An apparatus of wireless communications, the apparatus comprising:
- memory storing computer executable code thereon;
- and
- one or more processors coupled with the memory and configured to, individually or collectively, execute the computer executable code and cause the apparatus to:
- transmit one or more signals to a first wireless communications device;
- receive information regarding a frequency domain compressed precoder matrix index (PMI) from the first wireless communications device;
- determine one or more parameters used by the first wireless communications device for performing the frequency domain compression of a base PMI to select a first subset of a plurality of taps corresponding to a plurality of beams based on a time domain representation of the PMI in a first stage and to select a second subset of the first for each beam of the plurality of beams in a second stage;
- decompress the frequency domain compressed PMI, based on the information and the determined parameters, to derive a decompressed PMI;
- and
- adjust a configuration of one or more antennas of the BS based on the decompressed PMI.
6 more elements
Dependencies are inferred from the claim text.