Hybrid precoding method of millimeter wave large-scale MIMO system

A large-scale, millimeter-wave technology, applied in transmission systems, radio transmission systems, advanced technologies, etc., can solve problems such as difficult to obtain hybrid precoding design solutions, and achieve overcoming spectral efficiency loss, low computational complexity, and high energy consumption problem effect
CN112653496AActive Publication Date: 2021-04-13UNIV OF SCI & TECH OF CHINA
4 Cites 6 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF SCI & TECH OF CHINA
Publication Date
2021-04-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a hybrid precoding method for a millimeter-wave large-scale MIMO system, and the method comprises the steps: 1, carrying out the channel modeling, determining a channel matrix H, and carrying out the singular value decomposition of the channel matrix to obtain an optimal unconstrained all-digital precoding matrix; 2, constructing an analog precoding vector by adopting an alternate iteration method; 3, updating a residual matrix Fres by adopting a mode similar to matching pursuit; 4, calculating a digital precoding matrix by adopting a least square method and carrying out normalization processing; and 5, obtaining an analog combination matrix and a digital combination matrix at a receiving end by adopting the same steps. According to the invention, the optimal spectral efficiency close to that of the all-digital precoding method can be obtained with relatively low calculation complexity, so that the channel capacity close to that of all-digital precoding can be obtained, and the energy consumption of a radio frequency chain is greatly reduced.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of information and communication engineering, and in particular relates to a millimeter-wave large-scale multiple input multiple output (Multiple Input Multiple Output, MIMO) system hybrid precoding. Background technique

[0002] Today's wireless communication system's explosive demand for capacity has made traditional spectrum resources increasingly tight. Millimeter waves can provide abundant frequency band resources and gigabit data rates, and are considered to be the key technology of 5G (5th-Generation). However, the signal propagation of mmWave signals suffers from higher free-space path loss due to the 10-fold increase in frequency compared to current wireless communication systems. Fortunately, the reduction in wavelength enables smaller antenna sizes, allowing a large number of antennas to be packed in the same space. Large arrays enable beamforming gain to compensate for path loss. Furthermore, w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More