Channel Estimation Method, Reference Signal Sending Method, Apparatus, and System
AssigneeHuawei Technologies Co., Ltd.
InventorsKunpeng LIU, Di ZHANG
Life of this patent
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Abstract
This application discloses a channel estimation method, a reference signal sending method, an apparatus, and a system, and belongs to the communications field. The method includes: when a first precoding weight of a first reference signal and a second precoding weight of a second reference signal are the same, receiving, by a first network device, the first reference signal in a first time unit according to a first pattern, and receiving the second reference signal in a second time unit according to a second pattern; and performing, by the first network device, channel estimation on a channel in the second time unit.
Claims18
A channel estimation method, wherein the method comprises:
- when a first precoding weight of a first reference signal and a second precoding weight of a second reference signal are the same,
- receiving, by a first network device, the first reference signal in a first time unit according to a first pattern;
- and
- receiving the second reference signal in a second time unit according to a second pattern, wherein the first reference signal is a reference signal for channel measurement, and the second reference signal is a reference signal for demodulation;
- and
- performing, by the first network device, channel estimation on a channel in the second time unit based on the first reference signal and the second reference signal, wherein a quantity of time-frequency resources occupied by the second reference signal in the second pattern is less than a quantity of time-frequency resources occupied by the second reference signal in a third pattern, and the third pattern is a time-frequency distribution pattern of the second reference signal in the second time unit, and the third pattern is used when the first precoding weight and the second precoding weight are different.
A channel estimation apparatus, wherein the apparatus comprises:
- a communications component;
- at least one processor;
- and
- a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the at least one processor to:
- when a first precoding weight of a first reference signal and a second precoding weight of a second reference signal are the same,
- receive the first reference signal in a first time unit according to a first pattern by using the communications component;
- and
- receive the second reference signal in a second time unit according to a second pattern by using the communications component, wherein the first reference signal is a reference signal for channel measurement, and the second reference signal is a reference signal for demodulation;
- and
- perform channel estimation on a channel in the second time unit based on the first reference signal and the second reference signal, wherein a quantity of time-frequency resources occupied by the second reference signal in the second pattern is less than a quantity of time-frequency resources occupied by the second reference signal in a third pattern, and the third pattern is a time-frequency distribution pattern of the second reference signal in the second time unit, and the third pattern is used when the first precoding weight and the second precoding weight are different.
Dependencies are inferred from the claim text.