Devices, methods and computer programs for two-part feedback information transmission
AssigneeHuawei Technologies Co., Ltd.
InventorsMajid Nasiri Khormuji, Yi Qin, Kunpeng Liu, Branislav M. Popovic
Life of this patent
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Abstract
Devices, methods and computer readable medium for two-part feedback information transmission in wireless communications are provided. The two-part feedback information transmission is adopted, e.g., for improved downlink multiple-input and multiple-output (MIMO) precoding in time-division duplex (TDD)-based communication systems. The feedback information transmission allows compensating for adverse effects of incomplete UL-DL reciprocity for DL MIMO precoding caused by mismatched DL and UL channel measurements. The feedback information transmission being two-part allows low overhead for the feedback information.
Claims20
A client device comprising multiple receiving antennas, a processor and a memory having computer-executable instructions stored thereon which upon execution by the processor cause the client device to:
- receive a downlink (DL) pilot signal from a network node device via the multiple receiving antennas;
- determine feedback information based on DL channel power for each receiving antenna of the multiple receiving antennas from the received DL pilot signal;
- transmit a first part of the feedback information to the network node device via a non-physical layer transmission or a physical layer transmission;
- and
- transmit a second part of the feedback information to the network node device via the physical layer transmission.
A method, comprising:
- receiving, at a client device comprising multiple receiving antennas, a downlink (DL) pilot signal from a network node device via the multiple receiving antennas;
- determining, by the client device, feedback information based on DL channel power for each receiving antenna of the multiple receiving antennas from the received DL pilot signal;
- transmitting, by the client device, a first part of the feedback information to the network node device via a non-physical layer transmission or a physical layer transmission;
- and
- transmitting, by the client device, a second part of the feedback information to the network node device via the physical layer transmission.
A network node device, comprising:
- a processor and a memory having computer-executable instructions stored thereon which upon execution by the processor cause the network node device to:
- receive a first part of feedback information from a client device via a non-physical layer transmission or a physical layer transmission, the feedback information determined by the client device based on downlink (DL) channel power for each receiving antenna of multiple receiving antennas of the client device from a DL pilot signal received by the client device;
- receive a second part of the feedback information from the client device via the physical layer transmission;
- and
- determine a correlation matrix for DL precoding at least partly based on the received first part of the feedback information and the received second part of the feedback information.
Dependencies are inferred from the claim text.