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AssigneeApple Inc.
InventorsHaitong SUN, Wei ZENG, Yushu ZHANG, Hong HE, Oghenekome OTERI, Sigen YE, Weidong YANG, Chunxuan YE, Chunhai YAO, Dawei ZHANG
Estimating the term…
Methods and apparatuses are disclosed for calculating and compensating for Doppler shift in a high-speed environment. When in a high-speed environment, Doppler shifts on a transmitted radio frequency signal can become extremely large, which may make it difficult or even impossible for a receiving device to accurately decipher the signal. Therefore, embodiments of the present disclosure describe how tracking reference signals can be transmitted from multiple transmission/reception points, and processed by the UE. For example, the TRS transmitted from the TRP can be enhanced to allow for TRS information from two different TRPs. Additionally, or alternatively, a flag can be set within TRS information that identifies it as having originated from either a first TRP or a second TRP. Additionally, the UE can calculate Doppler shift information and report that information back to the base station in a report message, such as an SRS message. In this manner, the base station can precompensate for the Doppler shift.
A user equipment comprising:
A user equipment for reporting Doppler shift to a transmission-reception point (TRP), the user equipment comprising:
A transmission reception point (TRP) for compensating for Doppler shift in a high-speed environment, the TRP comprising:
Dependencies are inferred from the claim text.