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Construction method, transmission method, transmitting device and receiving device for precoding matrix

A technology of precoding matrix and transmission equipment, which is applied in the direction of shaping network, transmission system, digital transmission system in transmitter/receiver, etc., can solve the problem of high short-term codebook feedback overhead

Inactive Publication Date: 2017-09-01
深圳市雷克斯托通信有限公司
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[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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  • Construction method, transmission method, transmitting device and receiving device for precoding matrix
  • Construction method, transmission method, transmitting device and receiving device for precoding matrix
  • Construction method, transmission method, transmitting device and receiving device for precoding matrix

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[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, which are preferred embodiments of the present invention.

[0039] 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 method for constructing 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 ΛH and ΛV are diagonal matrices, the phase differences of the discrete Fourier transform DFT vectors of any two adjacent columns of the matrix DH are equal, and the discrete Fourier transform DFT vectors of any two adjacent columns of the matrix DV are The phase differences of the leaf transformed DFT vectors are not equal. The method and corresponding equipment solve the problem of high short-term codebook feedback overhead in eMBB of 4G LTE, LTE‑A and 5G IMT‑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): H04B7/0456H04L25/03H04B7/06
CPCH04B7/0456H04B7/0639H04L25/0391
Inventor 李健胜朱玉珍李翠丹
Owner 深圳市雷克斯托通信有限公司
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