A frequency offset processing method and system based on LTE

Abstract

The invention provides an LTE-based frequency offset processing method and system. The method includes setting the maximum time interval threshold for twice PUSCH scheduling for the user equipment on the base station side, and the threshold for the number of consecutive decoding errors, the user equipment side sends PUSCH data corresponding to the PUSCH scheduling on a predetermined resource, and the base station side uses the accumulated frequency offset The value performs frequency offset compensation on the received PUSCH data and calculates and updates the cumulative frequency offset value in real time. The updated cumulative frequency offset is used for subsequent TTI frequency offset compensation. The comparison between the count and the threshold of the number of consecutive decoding errors adjusts the maximum time interval threshold of two PUSCH scheduling in real time, and the base station side maintains the time interval count in real time, and judges whether to send to the user equipment according to the comparison between the time interval count and the threshold and whether there is PUSCH scheduling Forcibly send PUSCH scheduling to improve the frequency and accuracy of frequency offset estimation on the base station side.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a frequency offset processing method and system based on the third-generation mobile communication long-term evolution system (hereinafter referred to as LTE). Background technique [0002] The LTE system is very sensitive to carrier frequency offset, and it is necessary to achieve more accurate frequency offset estimation and timely frequency offset compensation in order to effectively eliminate the impact of frequency offset. Specifically for the LTE uplink, the base station needs to perform frequency offset estimation and timely compensation on the PUCCH (Physical Uplink Control Channel) and PUSCH (Physical Uplink Shared Channel) data sent by the user equipment. [0003] Since the amount of data contained in the PUCCH is small, the frequency offset value calculated by using the PUCCH may be inaccurate. The existing technology generally uses the PUSCH to ...

AI Technical Summary

Problems solved by technology

However, when there is only PUCCH scheduling but no PUSCH scheduling for a period of time after the last PUSCH scheduling, or when the interval between two PUSCH scheduling is large, the base station cannot estimate a more accurate frequency offset value to make the frequency offset compensate

Especially if the user equipment is in a high-speed mobile scene at this time, due to the large Doppler frequency shift and the inability to obtain a more accurate frequency offset value for frequency offset compensation, the processing performance of the base station side for PUCCH and PUSCH will be severely degraded, or even lead to uplink out of sync

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