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Narrowband millimeter wave MIMO channel estimation method under low-precision all-digital architecture

A channel estimation and millimeter-wave technology, applied in channel estimation, baseband system components, radio transmission systems, etc., can solve problems such as high computational complexity, increased channel matrix dimension, low estimation accuracy, etc., to improve channel estimation performance , the effect of reducing computational complexity

Active Publication Date: 2021-08-10
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, the massive MIMO architecture increases the dimension of the channel matrix, and the traditional channel estimation method is too computationally complex to be practically applied; and the receiver only uses low-precision received signals to estimate the channel matrix, and the estimation accuracy is low

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  • Narrowband millimeter wave MIMO channel estimation method under low-precision all-digital architecture
  • Narrowband millimeter wave MIMO channel estimation method under low-precision all-digital architecture
  • Narrowband millimeter wave MIMO channel estimation method under low-precision all-digital architecture

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Embodiment Construction

[0064] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0065] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a narrowband millimeter wave MIMO channel estimation method under a low-precision all-digital architecture, which belongs to the field of wireless communication signal processing, and comprises the following steps: a sending end sends mutually orthogonal pilot signals; the receiving end radio frequency link performs low-precision quantization on the analog receiving signal to obtain a digital receiving signal; a millimeter wave MIMO channel estimation problem is converted into a noise-containing quantization sparse signal reconstruction problem by utilizing an existing angle domain millimeter wave MIMO channel model; firstly, an optimization problem is constructed by using a consistency reconstruction criterion, and a channel vector support set is estimated; dimensionality reduction processing is carried out on a reconstruction problem, so that the calculation complexity is reduced; conditional expectation of the received signal after sampling is further calculated to obtain maximum likelihood estimation of the received signal; and finally, least square estimation is performed on the millimeter wave MIMO channel. Compared with a traditional channel estimation method, the method has the advantages that customized design is carried out according to the sparsity characteristic of the millimeter wave MIMO channel in the angle domain, the estimation precision is higher, and the calculation complexity is lower.

Description

technical field [0001] The invention belongs to the field of wireless communication signal processing, and relates to a narrow-band millimeter-wave MIMO channel estimation method under a low-precision all-digital framework. Background technique [0002] With the surge of user data traffic and the shortage of available spectrum resources, millimeter wave (mmWave) communication has become a key technology for next-generation mobile communications. However, millimeter wave has serious path loss, atmospheric attenuation and rain attenuation, which is not conducive to long-distance outdoor transmission. mmWave systems are often combined with massive multiple-input multiple-output (MIMO) architectures for spatial multiplexing and beamforming. The massive MIMO architecture has a larger antenna array gain to compensate for the severe path loss of the millimeter-wave channel; at the same time, the shorter wavelength of the millimeter-wave allows more antenna elements to be equipped ...

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Application Information

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IPC IPC(8): H04L25/02H04B7/0413
CPCH04L25/024H04B7/0413
Inventor 罗雷李心安
Owner CHONGQING UNIV OF POSTS & TELECOMM
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