Method for determining precoding matrix indicator, receiving equipment and sending equipment

Abstract

Embodiments of the invention provide a method for determining a precoding matrix indicator, receiving equipment and sending equipment. The method for determining the precoding matrix indicator comprises the following steps that a receiving end selects a precoding matrix W from a codebook based on a reference signal sent by a sending end, wherein the precoding matrix W is a product of two matricesW1 and W2, the W1 comprises NB block matrixes Xi, NB is larger than or equal to 1, and W1 is represented as (formula), wherein i is greater than or equal to 1 and is smaller than or equal to NB, wherein the column xi,j of each block matrix Xi is a kronecker product of a first vector Aij and a second vector Bij: (formula); and the receiving end sends a precoding matrix indicator (PMI) correspondingto the precoding matrix W to the sending end, so that the sending end obtains the precoding matrix W according to the PMI. According to the method for determining the precoding matrix indicator, thereceiving equipment and the sending equipment in the embodiments of the invention, the precoding precision can be improved, so that the system throughput is improved.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular, to a method for determining a precoding matrix indication, a receiving device, and a sending device. Background technique [0002] In a wireless communication network, a Multiple Input Multiple Output (MIMO) wireless communication system can obtain diversity and array gain through a transmit precoding technique and a receive combining technique. A system utilizing precoding can be expressed as [0003] [0004] where y is the received signal vector, H is the channel matrix, is the precoding matrix, s is the transmitted symbol vector, and N is the measurement noise. [0005] Optimal precoding usually requires the transmitter to be fully aware of Channel State Information (CSI). A common method is that the user equipment (User Equipment, UE) quantizes the instantaneous CSI and reports it to the base station. Usually, the receiving end (su...

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Problems solved by technology

[0008] Embodiments of the present invention provide a method for determining a precoding matrix indication, a receiving device, and a sending device, so as to overcome the precoding matrix that cannot reflect the different characteristics of the two directions of the two-dimensional area array antenna in the prior art, thereby causing precoding The problem of low precision

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