A Hybrid Precoding Method for Millimeter-Wave Massive MIMO Systems

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
CN112653496BActive Publication Date: 2021-12-14UNIV OF SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF SCI & TECH OF CHINA
Publication Date
2021-12-14

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Abstract

The invention discloses a hybrid precoding method for a millimeter-wave massive MIMO system. The steps include: 1. Channel modeling, determining the channel matrix H, and performing singular value decomposition on the channel matrix to obtain optimal unconstrained full digital precoding Matrix, 2. Construct the simulated precoding vector by alternate iteration method, 3. Update the residual matrix F in a way similar to matching pursuit res , 4. Calculating the digital precoding matrix by the least square method and performing normalization processing. 5. Obtaining the analog combination matrix and the digital combination matrix at the receiving end through the same steps. The present invention can obtain better spectrum efficiency close to the full digital precoding method with relatively low computational complexity, thus can obtain channel capacity close to the full digital precoding method, and greatly save energy consumption of the radio frequency chain.
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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

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