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Low-complexity hybrid precoding method in millimeter wave large-scale MIMO system

A low-complexity, millimeter-wave technology, applied in transmission systems, radio transmission systems, transmission monitoring, etc.

Active Publication Date: 2018-08-24
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to solve the above-mentioned problems existing in the existing partially connected millimeter-wave massive MIMO system, the present invention provides a low-complexity hybrid precoding method in the millimeter-wave massive MIMO system

Method used

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Embodiment

[0079] It can be seen from Table 1 that the present invention sets the required system parameters and the initial value of the algorithm, and sets the total transmission power of the base station to 1w, and the transmission power of each antenna is equal. According to the theorem of large numbers, the number L of millimeter wave scatterers is set to 10. For different simulation parameters K, N, M, N s Will be reset.

[0080] Table 1 shows the system parameter values ​​required in the simulation

[0081] parameters

value

Base station transmit power

1w

Number of millimeter wave scatterers L

10

[0082] First, for K=16, N s =N=16, M=8 The system reachability and rate are compared with the signal-to-noise ratio, and the simulation results are as follows figure 2 As shown, it can be seen from the figure that with the increase of the signal-to-noise ratio, the system reachability and rate show an upward trend, and the algorithm proposed by...

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Abstract

The invention discloses a low-complexity hybrid precoding method in a millimeter wave large-scale MIMO system. In the method, the minimum F norm is got between corresponding positions of a precoding scheme corresponding to each radio frequency link and partially connected with a hybrid precoding scheme and an optimal digital precoding scheme under the condition of not considering the radio frequency link, and thus a digital precoding matrix and an analog precoding matrix of each radio frequency link are got via computation. The phase of the analog precoding matrix of each radio frequency linkis the phase of a maximum singular value vector of the optimal digital precoding matrix, the real part of a digital precoding matrix element is the product of conjugate transpose of the analog precoding matrix and the real part of an optimal digital precoding vector at a corresponding position, and the imaginary part of the digital precoding matrix element is the product of the conjugate transposeof the analog precoding matrix and the opposite number of the imaginary part of the optimal digital precoding vector at the corresponding position. Compared with analog precoding, the method providedby the invention can acquire the higher system accessibility and speed with the lower algorithm complexity.

Description

technical field [0001] The invention belongs to the technical field of information and communication engineering, and relates to a millimeter wave massive MIMO technology in a wireless communication system, in particular to a low-complexity hybrid precoding method in a partially connected millimeter wave massive MIMO system. Background technique [0002] In recent years, with the improvement of requirements for wireless communication equipment and multimedia services, the bandwidth of traditional frequency bands in wireless communication networks has been unable to meet the demand. The millimeter wave frequency band works at 30GHz-300GHz, which has a higher bandwidth than traditional electromagnetic waves. However, due to the shorter wavelength of the millimeter wave, it is suitable for arranging a large number of antennas at the transmitting end and the receiving end to compensate for the path loss of the millimeter wave channel, thereby improving the channel transmission q...

Claims

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Application Information

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IPC IPC(8): H04B7/0456H04B7/0413H04B17/391
CPCH04B7/0413H04B7/0465H04B17/391
Inventor 曹海燕周冬瞿拓思许方敏王秀敏方昕
Owner HANGZHOU DIANZI UNIV
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