Uplink precoding method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsYan Sun, Xiaomeng Chai, Yiqun Wu
Life of this patent
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Abstract
Example uplink precoding methods and apparatuses are provided. One example method includes receiving a first reference signal from a terminal device. A first codebook is determined based on the received first reference signal, wherein the first codebook is used to precode an uplink signal. The first codebook is then sent to the terminal device. In a second example, a first reference signal is sent to an access network device. A first codebook is then received from the access network device and an uplink signal is precoded using the first codebook.
Claims15
An uplink precoding method, comprising:
- receiving a first reference signal from a terminal device;
- measuring the first reference signal on Z resources to obtain Z pieces of uplink channel information, wherein Z is an integer greater than or equal to 1;
- determining Z precoding matrices based on the Z pieces of uplink channel information;
- determining M precoding matrices based on the Z precoding matrices, wherein M is less than or equal to Z;
- determining a first codebook that comprises the M precoding matrices, wherein the first codebook is used to precode an uplink signal;
- and
- sending the first codebook to the terminal device.
An apparatus, comprising:
- at least one processor coupled to one or more memories storing programming instructions that are executable by the at least one processor to perform operations comprising:
- receiving a first reference signal from a terminal device;
- measuring the first reference signal on Z resources to obtain Z pieces of uplink channel information, wherein Z is an integer greater than or equal to 1;
- determining Z precoding matrices based on the Z pieces of uplink channel information;
- determining M precoding matrices based on the Z precoding matrices, wherein M is less than or equal to Z;
- determining a first codebook that comprises the M precoding matrices, wherein the first codebook is used to precode an uplink signal;
- and
- sending the first codebook to the terminal device.
An apparatus, comprising:
- at least one processor coupled to one or more memories storing programming instructions that are executable by the at least one processor to perform operations comprising:
- sending a first reference signal to an access network device;
- receiving a first codebook from the access network device;
- receiving an indication rule of a sub-band precoding matrix from the access network device, wherein the indication rule of the sub-band precoding matrix comprises an uplink channel bandwidth, where the uplink channel bandwidth comprises at least a first sub-band and a second sub-band;
- and
- precoding an uplink signal on the first sub-band by using the first codebook.
Dependencies are inferred from the claim text.