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Hybrid precoding algorithm based on millimeter wave large-scale MIMO multi-user scene

A millimeter-wave, large-scale technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve problems such as high hardware costs and high computational complexity

Active Publication Date: 2021-04-09
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: Aiming at the high hardware cost and computational complexity of the existing precoding algorithm, a hybrid processing algorithm with good performance and computational cost is proposed

Method used

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  • Hybrid precoding algorithm based on millimeter wave large-scale MIMO multi-user scene
  • Hybrid precoding algorithm based on millimeter wave large-scale MIMO multi-user scene
  • Hybrid precoding algorithm based on millimeter wave large-scale MIMO multi-user scene

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Embodiment 1

[0140] 1. We use the S-V model to model the mmWave MIMO channel:

[0141]

[0142] where L is the number of scattered millimeter-wave beams, δ i Denotes the gain of the i-th beam path, θ i ∈[0,2π], represent the angle of departure and angle of arrival of the i-th path, respectively, and Denote the antenna steering vectors of the transmitting end and the receiving end, respectively, where i=1,2,...,L. Using a uniform linear array, and It can be expressed as:

[0143]

[0144]

[0145] Where λ is the wavelength of the electromagnetic wave, and d is the antenna spacing. Assume that the number of paths in the space is L=10.

[0146] 2. Build as Figure 1 MIMO architecture shown. The number of base station antennas Nt=64; the number of users K=8; the number of RF chains is 10.

[0147] 3. Design F RF . The algorithm idea of ​​column iteration is used for design. first assume Then the above objective equation can be transformed into:

[0148]

[014...

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Abstract

The invention relates to the technical field of large-scale MIMO (Multiple Input Multiple Output) communication, in particular to a hybrid precoding algorithm based on millimeter wave large-scale MIMO multi-user scenarios, which is an algorithm for hybrid precoding in large-scale MIMO by adopting an adaptive connection network and mainly comprises the following steps of: designing an analog precoder and giving the analog precoder; and receiving and solving the baseband precoder through MMSE. By optimizing the analog precoder, the spectral efficiency is maximized. Meanwhile, according to the algorithm provided by the invention, the cost and the complexity of the algorithm can be further reduced on the premise of meeting the performance.

Description

technical field [0001] The invention relates to the technical field of massive MIMO communication, in particular to a hybrid precoding algorithm based on millimeter wave massive MIMO multi-user scenarios. Background technique [0002] With the continuous development of millimeter wave communication technology, great breakthroughs have been made in millimeter wave massive MIMO related technologies. The biggest feature of millimeter-wave massive MIMO is that it can transmit multiple data streams at the same time, effectively improving the signal capacity of the system. However, compared with the microwave system, the channel is sparse when the millimeter wave propagates. That is, the attenuation of the millimeter wave propagation is relatively large, and the power that can be radiated is relatively small. To overcome the attenuation in mmWave communication, precoding techniques are introduced in massive MIMO systems. [0003] Precoding is a technology that uses channel info...

Claims

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Application Information

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IPC IPC(8): H04B7/0452H04B7/0456
CPCH04B7/0452H04B7/0456
Inventor 程知群李金萌李航
Owner HANGZHOU DIANZI UNIV
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