Method and apparatus for reference signal configuration of a wireless communication system
AssigneeHon Hai Precision Industry Co., Ltd.
InventorMitsuo Sakamoto
Life of this patent
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Abstract
A method for reference signal configuration of a wireless communication system is provided. The method includes the following actions. An uplink channel is received by a base station from a user equipment (UE). A frequency offset and a coherence time effected by a phase noise and a Doppler shift are estimated by the base station in response to the uplink channel. A reference signal format is configured by the base station in response to the frequency offset and the coherence time effected by the phase noise and the Doppler shift. A physical uplink shared channel is configured by the UE in response to the reference signal format.
Claims18
A method for reference signal configuration of a wireless communication system, comprising:
- receiving, by a base station, an uplink channel from a user equipment (UE);
- estimating, by the base station, a frequency offset, and a coherence time effected by a phase noise and a Doppler shift in response to the uplink channel, wherein the step of estimating the frequency offset in response to the uplink channel comprises:
- estimating a channel impulse response in a first band edge and generating a first frequency offset;
- estimating the channel impulse response in a second band edge and generating a second frequency offset, wherein a frequency of the first band edge is higher than a frequency of the second band edge;
- and
- performing a maximum ratio combining and averaging on the first frequency offset and the second frequency offset;
- and
- configuring, by the base station, a reference signal format in response to the estimated frequency offset, and the estimated coherence time effected by the phase noise and the Doppler shift.
A base station, comprising:
- a processor configured to perform instruction for:
- receiving an uplink channel from a user equipment (UE);
- estimating, by the base station, a frequency offset, and a coherence time effected by a phase noise and a Doppler shift in response to the uplink channel;
- and
- configuring, by the base station, a reference signal format in response to the estimated frequency offset and the estimated coherence time effected by the phase noise and the Doppler shift, wherein when the frequency offset is estimated, the processor is further configured to perform instruction for:
- estimating a channel impulse response in a first band edge and generating a first frequency offset;
- estimating the channel impulse response in a second band edge and generating a second frequency offset, wherein a frequency of the first band edge is higher than a frequency of the second band edge;
- and
- performing a maximum ratio combining and averaging on the first frequency offset and the second frequency offset and estimating the frequency offset.
Dependencies are inferred from the claim text.