17441962. SYSTEM AND METHOD FOR HIGH SPEED DOPPLER COMPENSATION IN A CELLULAR ENVIRONMENT simplified abstract (Apple Inc.)

SYSTEM AND METHOD FOR HIGH SPEED DOPPLER COMPENSATION IN A CELLULAR ENVIRONMENT

Organization Name

Apple Inc.

Inventor(s)

Haitong Sun of Cupertino CA (US)

Wei Zeng of Saratoga CA (US)

Yushu Zhang of Beijing (CN)

Hong He of San Jose CA (US)

Oghenekome Oteri of San Diego CA (US)

Sigen Ye of Whitehouse Station NJ (US)

Weidong Yang of San Diego CA (US)

Chunxuan Ye of San Diego CA (US)

Chunhai Yao of Bejing (CN)

Dawei Zhang of Saratoga CA (US)

SYSTEM AND METHOD FOR HIGH SPEED DOPPLER COMPENSATION IN A CELLULAR ENVIRONMENT - A simplified explanation of the abstract

This abstract first appeared for US patent application 17441962 titled 'SYSTEM AND METHOD FOR HIGH SPEED DOPPLER COMPENSATION IN A CELLULAR ENVIRONMENT

Simplified Explanation

Methods and apparatuses are disclosed for calculating and compensating for Doppler shift in a high-speed environment. This technology addresses the issue of Doppler shifts on transmitted radio frequency signals becoming extremely large in high-speed environments, making it difficult for receiving devices to accurately decipher the signals.

• Tracking reference signals (TRS) are transmitted from multiple transmission/reception points (TRPs) and processed by the user equipment (UE).
• The TRS transmitted from a TRP can be enhanced to include TRS information from two different TRPs.
• A flag can be set within the TRS information to identify its origin from either the first or second TRP.
• The UE can calculate Doppler shift information and report it back to the base station in a report message, such as a sounding reference signal (SRS) message.
• The base station can then precompensate for the Doppler shift based on the reported information.

Potential Applications

• Wireless communication systems in high-speed environments, such as high-speed trains or vehicles.
• Mobile communication networks in areas with fast-moving users, such as sports events or crowded public transportation.

Problems Solved

• Large Doppler shifts in high-speed environments can cause difficulties in accurately decoding radio frequency signals.
• Traditional methods may not be sufficient to compensate for these large Doppler shifts.

Benefits

• Improved accuracy in decoding radio frequency signals in high-speed environments.
• Enhanced communication reliability in fast-moving scenarios.
• Efficient precompensation for Doppler shift, leading to better overall system performance.

Original Abstract Submitted

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.