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Precoding matrix construction method, precoding matrix transmission method, precoding matrix sending device and precoding matrix receiving device

A technology of precoding matrix and construction method, which is applied in the field of sending equipment and receiving equipment, construction method of precoding matrix, and transmission method, and can solve the problem of high short-term codebook feedback overhead

Inactive Publication Date: 2017-12-08
深圳市雷克斯托通信有限公司
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Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention proposes a precoding matrix construction method, transmission method, sending device and receiving device, which are applied to 4G LTE, LTE-A and 5G IMT-2020 mobile communication system eMBB, and solve short-term The problem of high codebook feedback overhead

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  • Precoding matrix construction method, precoding matrix transmission method, precoding matrix sending device and precoding matrix receiving device
  • Precoding matrix construction method, precoding matrix transmission method, precoding matrix sending device and precoding matrix receiving device
  • Precoding matrix construction method, precoding matrix transmission method, precoding matrix sending device and precoding matrix receiving device

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[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are preferred embodiments of the present invention.

[0040] Providing a cross-polarized array with vertical and horizontal polarization at the transmitter tends to result in well-separated transmit channels, which is attractive for multi-stream MIMO transmission. Since the use of a block-diagonal structured precoding matrix matches the block-diagonal structure of the block-diagonal channel matrix, precoding with a block-diagonal structure is suitable. From this point of view, the commonly used + / - 45 degree cross-polarized arrays are likely no longer as good as using horizontal and Vertical polarization is then block-diagonal, which potentially increases inter-stream interference and thereby impairs MIMO performance, and is therefore considered unattractive. Thus, the block diagonal precoding matrix structure is not optimal for the + / - 45 degree c...

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Abstract

The present invention relates to the technical field of wireless communication, and in particular to a construction method of a precoding matrix, a transmission method, a sending device and a receiving device. Wherein, the construction method of the precoding matrix includes: constructing the precoding matrix W as the product of the first codebook matrix W1 representing wideband or long-term channel characteristics and the second codebook matrix W2 representing narrowband or short-term channel characteristics; wherein, The first codebook matrices Λ, RULA, H, RULA, V are diagonal matrices, and each column of the matrices DCLA, DULA, H, DULA, V is a discrete Fourier transform DFT vector. The method and corresponding equipment solve the problem of high short-term codebook feedback overhead in eMBB of 4G LTE, LTE‑A and 5GIMT‑2020 mobile communication systems.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and in particular to a construction method of a precoding matrix, a transmission method, a sending device and a receiving device. Background technique [0002] In the precoding scheme proposed from the 4Tx Houserholder single codebook of the LTE R8 version to the 8TxDFT double codebook of the R10 version under the influence of R1-090388, and the enhanced 4Tx double codebook of the R12 version, the traditional 2D MU- In the horizontal direction of MIMO, the beam direction is dynamically adjusted through precoding, and the downtilt angle is adjusted manually or electronically to control the beam direction in the vertical direction. Therefore, the downtilt angle of each beam is unique. [0003] The Kronecker dual codebook is introduced in the R13 and 14 versions, which extends the traditional 2DMU-MIMO field limited to the study of two-dimensional horizontal planes to 3D MU-MI...

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Application Information

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IPC IPC(8): H04B7/0456H04B7/06
CPCH04B7/0456H04B7/0639
Inventor 李健胜朱玉珍
Owner 深圳市雷克斯托通信有限公司
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