Data demodulation method, user equipment, base station and system

Abstract

Embodiments of the present invention relate to a data demodulation method, device, and system. The method includes: obtaining notification information indicating that the UE is in a high-speed mobile state; according to the notification information, performing time-frequency synchronization processing on the first downlink data to obtain second downlink data, Wherein, the adjustment frequency during the time-frequency synchronization processing is greater than the adjustment frequency when the UE is in a non-high-speed mobile state, and the adjustment coefficient adopted by the loop filter is greater than the adjustment coefficient when the UE is in a non-high-speed mobile state; the second downlink data is demodulated The third downlink data is obtained, wherein no filtering is performed between channel estimation TTIs during demodulation processing, or the weighted filter coefficient of the current TTI channel estimation is greater than the weighted filter coefficient when the UE is in a non-high-speed mobile state. It can be seen from the above that in the embodiment of the present invention, after obtaining notification information to know that the UE is in a high-speed mobile state, the demodulation method applicable to high-speed scenarios can enable the UE to obtain good downlink demodulation performance and improve the UE's downlink data throughput. .

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a data demodulation method, user equipment, base station and system. Background technique [0002] With the development of science and technology, users' demands for communication in high-speed scenarios are also increasing. For example, users communicate on a moving high-speed train. When a user equipment (User Equipment, UE) is in a high-speed moving state, the received downlink data will generate a large Doppler frequency offset, resulting in low throughput of UE downlink data. [0003] In the prior art, in order to improve the downlink data throughput of the UE in the high-speed mobile state, when demodulating the downlink data received by the UE, the Doppler frequency is usually firstly performed according to the common reference signal (Common Reference Signal, CRS). Offset estimation, when performing demodulation reference signal (DeModulation Reference Signal, DMRS) d...

AI Technical Summary

Problems solved by technology

[0004] Due to the large Doppler frequency offset in high-speed scenarios, the traditional frequency offset estimation method is not ideal and the accuracy is low. Therefore, the data demodulation method in the prior art cannot effectively improve the downlink performance of the UE in the high-speed mobile state. Data throughput, the downlink data throughput of the UE in the high-speed mobile state is still low

Images