Channel estimation method and related device

Abstract

The embodiment of the invention discloses a channel estimation method and a related device, which are used for improving the channel estimation precision. The method provided by the embodiment of theinvention comprises the following steps: carrying out channel estimation according to a received pilot signal to obtain a channel estimation initial value of a channel corresponding to the pilot signal; generating a beam convergence interval according to the target beam, wherein the target correlation value of the target wave beam and the channel estimation initial value meets a preset condition and belongs to a first set of beams, wherein the first wave beam set is a set which is generated in a preset space angle interval according to the array antenna and comprises a plurality of first wavebeams; wherein the preset condition is that the target correlation value is greater than a first preset value, or the target correlation value is the first M highest correlation values in the correlation values of each first wave beam and the channel estimation initial value; generating a second wave beam set comprising a plurality of second wave beams in the wave beam convergence interval, wherein the wave beam interval of the adjacent second wave beams in the second wave beam set is smaller than that of the adjacent first wave beams in the first wave beam set; and performing channel estimation on a channel corresponding to the pilot signal according to the second beam set.

Description

technical field [0001] The present application relates to wireless communication technologies, and in particular to a channel estimation method and related devices. Background technique [0002] With the continuous development of mobile communications, wireless spectrum resources are becoming increasingly scarce, and massive multiple-input multiple-output (Massive-MIMO) is widely used in the field of wireless communications. Massive-MIMO makes full use of space resources by setting multiple antennas at both the transmitting and receiving ends of the communication link. It can provide array gain to improve the power efficiency of the system, and provide multiplexing gain to increase the spectral efficiency of the system. If the channel information of the channel between the receiving end and the sending end is known information, the coverage and spectral efficiency of the data channel can be greatly improved, and the demodulation threshold of the data channel can be significa...

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Problems solved by technology

[0004] However, in the prior art, due to the deviation between the DFT fixed beam and the real channel of the SRS signal, the SRS signal after the DFT fixed beam transformation is dispersed to multiple beams with different intensities, so that the channel estimation error of the beam domain Es / NO is low Large, affecting the accuracy of DMRS channel estimation

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