Method and apparatus for obtaining reference signal
AssigneeHuawei Technologies Co., Ltd.
InventorsLixia Xue, XU ZHANG, Yongxing Zhou
Life of this patent
Estimating the term…
Abstract
This application relates to the mobile communications field, and in particular, to a technology for obtaining a reference signal in a wireless communications system. In a method for obtaining a reference signal, a terminal device obtains position offset information; the terminal device obtains a first sequence based on the position offset information; and the terminal device demodulates, by using the first sequence, a control channel signal carried in a control channel resource set, to obtain downlink control information. In this way, MU-MIMO transmission performance is improved.
Claims15
A method, comprising:
- sending, by a network device, a first position and a first offset, wherein the first position is a quantity of physical resource blocks by which a smallest subcarrier within a bandwidth comprising a control channel resource set is offset from a frequency domain reference point, and wherein the first offset is a quantity of physical resource blocks by which a smallest subcarrier in the control channel resource set is offset from the smallest subcarrier within the bandwidth comprising the control channel resource set;
- and
- mapping, by the network device, a demodulation reference signal sequence to a resource element carrying the demodulation reference signal sequence in a control channel resource set, based on the first position and the first offset, wherein the demodulation reference signal sequence is used for demodulating a control channel signal carried in the control channel resource set, to obtain downlink control information.
A communication apparatus, comprising:
- one or more processors;
- and
- at least one memory, wherein the at least one memory stores instructions, and when executing the instructions stored in the memory, the one or more processors executes operations comprising:
- sending a first position and a first offset, wherein the first position is a quantity of physical resource blocks by which a smallest subcarrier within a bandwidth comprising a control channel resource set is offset from a frequency domain reference point, and wherein the first offset is a quantity of physical resource blocks by which a smallest subcarrier in the control channel resource set is offset from the smallest subcarrier within the bandwidth comprising the control channel resource set;
- and
- mapping a demodulation reference signal sequence to a resource element carrying the demodulation reference signal sequence in a control channel resource set, based on the first position and the first offset, wherein the demodulation reference signal sequence is used for demodulating a control channel signal carried in the control channel resource set, to obtain downlink control information.
One or more non-transitory computer-readable media storing computer instructions, that when executed by one or more processors, cause a computing device to perform operations comprising:
- sending a first position and a first offset, wherein the first position is a quantity of physical resource blocks by which a smallest subcarrier within a bandwidth comprising a control channel resource set is offset from a frequency domain reference point, and wherein the first offset is a quantity of physical resource blocks by which a smallest subcarrier in the control channel resource set is offset from the smallest subcarrier within the bandwidth comprising the control channel resource set;
- and
- mapping a demodulation reference signal sequence to a resource element carrying the demodulation reference signal sequence in a control channel resource set, based on the first position and the first offset, wherein the demodulation reference signal sequence is used for demodulating a control channel signal carried in the control channel resource set, to obtain downlink control information.
Dependencies are inferred from the claim text.