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Hybrid precoding method based on mmWave massive MIMO multi-user scenarios

A millimeter wave, precoding technology, applied in electrical components, radio transmission systems, transmission systems, etc., can solve problems such as high hardware cost and computational complexity, and achieve high flexibility and reduce interference.

Active Publication Date: 2022-01-11
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Hybrid precoding method based on mmWave massive MIMO multi-user scenarios
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  • Hybrid precoding method based on mmWave massive MIMO multi-user scenarios

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Experimental program
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Embodiment 1

[0154] 1. We use the S-V model to model the mmWave MIMO channel:

[0155]

[0156] 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:

[0157]

[0158]

[0159] 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.

[0160] 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.

[0161] 3. Design F RF . The method of column iteration is used for design. first assume Then the above objective equation can be transformed into:

[0162]

[0163] Under t...

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Abstract

The present invention relates to the technical field of massive MIMO communication, in particular to a hybrid precoding method based on millimeter wave massive MIMO multi-user scenarios, a method for hybrid precoding using an adaptive connection network in massive MIMO, mainly including analog precoding After the coder is designed and the analog precoder is given, the baseband precoder is solved by MMSE reception. By optimizing the analog precoder to maximize spectral efficiency. At the same time, the method proposed in this application can further reduce the cost and the complexity of the method on the premise of satisfying the performance.

Description

technical field [0001] The present invention relates to the technical field of massive MIMO communication, in particular to a hybrid precoding method 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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