Data Demodulation Method, User Equipment, Base Station, and System

A data demodulation method, comprising:

• establishing, by a base station, a connection to user equipment (UE);
• sending, to the UE, notification information that the UE is in a high-speed moving state, so that the UE performs time-frequency synchronization processing on first downlink data according to the notification information to obtain second downlink data, wherein an adjustment frequency in the time-frequency synchronization processing is greater than an adjustment frequency that is at a time when the UE is in a non-high-speed moving state, and wherein an adjustment coefficient used for loop filtering in the time-frequency synchronization processing is greater than an adjustment coefficient that is at the time when the UE is in the non-high-speed moving state;
• and
• performing demodulation processing on the second downlink data to obtain third downlink data, wherein in the demodulation processing, inter-transmission time intervals (TTIs) filtering for a channel estimation is not performed, or a filtering coefficient as a weight of a current TTI for a channel estimation is greater than a filtering coefficient as a weight of a TTI that is at the time when the UE is in the non-high-speed moving state for a channel estimation.

User equipment (UE), comprising:

• a communications interface;
• and
• a processor coupled to the communications interface and configured to:
• obtain, through the communications interface, from a base station, notification information indicating that the UE is in a high-speed moving state;
• perform time-frequency synchronization processing on first downlink data according to the notification information to obtain second downlink data, wherein an adjustment frequency in the time-frequency synchronization processing is greater than an adjustment frequency that is at a time when the UE is in a non-high-speed moving state, and wherein an adjustment coefficient used for loop filtering in the time-frequency synchronization processing is greater than an adjustment coefficient that is at the time when the UE is in the non-high-speed moving state;
• and
• perform demodulation processing on the second downlink data to obtain third downlink data, wherein in the demodulation processing, inter-transmission time intervals (TTIs) filtering for a channel estimation is not performed, or a filtering coefficient as a weight of a current TTI for a channel estimation is greater than a filtering coefficient as a weight of a TTI that is at the time when the UE is in the non-high-speed moving state for a channel estimation.

A base station, comprising:

• a communications interface;
• and
• a processor coupled to the communications interface and configured to:
• establish, through the communications interface, a connection to user equipment (UE);
• send, through the communications interface, to the UE, notification information that the UE is in a high-speed moving state, so that the UE performs time-frequency synchronization processing on first downlink data according to the notification information to obtain second downlink data, wherein an adjustment frequency in the time-frequency synchronization processing is greater than an adjustment frequency that is at a time when the UE is in a non-high-speed moving state, and wherein an adjustment coefficient used for loop filtering in the time-frequency synchronization processing is greater than an adjustment coefficient that is at the time when the UE is in the non-high-speed moving state;
• and
• perform demodulation processing on the second downlink data to obtain third downlink data, wherein in the demodulation processing, inter-transmission time intervals (TTIs) filtering for channel estimation is not performed, or a filtering coefficient as a weight of a current TTI for a channel estimation is greater than a filtering coefficient as a weight of a TTI that is at the time when the UE is in the non-high-speed moving state for a channel estimation.