A channel estimation method and related device

Abstract

The embodiment of the present application discloses a channel estimation method and a related device, which are used to improve the accuracy of channel estimation. The method in the embodiment of the present application includes: performing channel estimation according to the received pilot signal, and obtaining an initial channel estimation value of the channel corresponding to the pilot signal; forming a beam convergence interval according to the target beam, the target beam and the initial channel estimation value The target correlation value of the value satisfies a preset condition and belongs to a first beam set, the first beam set is a set including a plurality of first beams generated in a preset space angle interval according to the array antenna, the The preset condition is that the target correlation value is greater than a first preset value, or the target correlation value is the top M highest correlation values ​​among the correlation values ​​between the first beams and the channel estimation initial value value; a second beam set including a plurality of second beams is generated in the beam convergence interval, and the beam spacing of adjacent second beams in the second beam set is smaller than that of the adjacent first beam set in the first beam set A beam interval of a beam; 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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