System and method for downlink channel sounding in wireless communications systems
AssigneeHuawei Technologies Co., Ltd.
InventorsJianglei Ma, Peiying Zhu, Wen Tong, Ming Jia
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Abstract
In accordance with an embodiment, a method of operating a base station configured to communicate with at least one user device includes transmitting a reference signal to the at least one user device, receiving channel quality information from the at least one user device, and forming a beam based on the channel quality information received from the at least one user device.
Claims37
A method of operating a base station configured to communicate wirelessly in a wireless network, the method comprising:
- transmitting, by the base station to a user device, precoded reference signals over different beam directions;
- receiving, by the base station from the user device, an index that explicitly identifies one of the precoded reference signals transmitted to the user device;
- and
- transmitting, by the base station to the user device, a beam-formed data signal in accordance with the index received from the user device.
The method of claim ii, wherein performing the coarse tuning comprises:
- transmitting, to the user device, precoded reference sequences, wherein the precoded reference sequences are precoded with precoding matrices separating the precoded reference sequences;
- receiving, from the user device, channel information related to the;
- and
- computing a best rough tune precoding matrix for the user device based on the channel information.
A base station in a wireless network, the base station comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
- transmit, to a user device, precoded reference signals over different beam directions;
- receive, from the user device, an index that explicitly identifies one of the precoded reference signals transmitted to the user device;
- and
- transmit, from the user device, a beam-formed data signal in accordance with the index received from the user device.
A method of operating a user device configured to communicate wirelessly in a wireless network, the method comprising:
- receiving, by the user device from a base station, precoded reference signals;
- transmitting, by the user device to the base station, an index explicitly identifying one of the precoded reference signals received from the base station;
- and
- receiving, by the user device from the base station, a beam-formed data signal.
A user device in a wireless network, the user device comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
- receive, from a base station, precoded reference signals;
- transmit, to the base station, an index that explicitly identifies one of the precoded reference signals received from the base station;
- and
- receive, from the base station, a beam-formed data signal.
Dependencies are inferred from the claim text.