Method and base station for ensuring channel phase continuity between rb groups after precoding

Abstract

The present invention discloses a method and a base station for ensuring channel phase continuity between precoded resource block (RB) groups. The reciprocity of the corresponding downlink channel is obtained; the base station calculates the weight phase correction factor based on the obtained downlink channel, and uses the weight phase correction factor to correct the precoding weight; the base station according to the corrected precoding The weights are used to pre-encode the data and send it. Through the present invention, the channel phase continuity between RB groups after precoding can be guaranteed, and system performance and spectrum efficiency can be improved.

Description

technical field [0001] The invention relates to precoding technology in the field of wireless communication, in particular to a method and base station for ensuring channel phase continuity between RB groups after precoding. Background technique [0002] The Beamforming (BF, Beamforming) technology is a key Multiple Input Multiple Output (MIMO, Multiple Input Multiple Output) technology supported by the Time Division Duplex Long Term Evolution (TDD-LTE, Time Division Dulpexing Long Term Evolution) system. However, since the frequency-domain resource blocks (RB, Resource Blocks) of the channel phase are originally continuous, however, considering the complexity and realizability of the actual system and equipment, the BF weights are based on the RB group as the granularity, so Different RB groups adopt their own independent BF weight vectors, so that the channel phases between the RB groups are no longer continuous, and there is a separation. Due to the phenomenon of phase d...

AI Technical Summary

Problems solved by technology

However, since the frequency-domain resource blocks (RB, Resource Blocks) of the channel phase are originally continuous, however, considering the complexity and realizability of the actual system and equipment, the BF weights are based on the RB group as the granularity, so Different RB groups use their own independent BF weight vectors, so that the channel phases between RB groups are no longer continuous, and there is a split

Due to the phenomenon of phase discontinuity, the channel estimation of the downlink demodulation reference signal / pilot (DMRS, Demodulation Reference Signal) is not suitable for the following operations: based on the least squares (LS, Least Square) time domain / frequency domain noise reduction processing after channel estimation will increase the channel estimation error and affect the performance of the BF system

Images