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FDD large-scale mimo and rate optimal statistical precoding method and equipment

A precoding, large-scale technology, applied in transmission systems, baseband system components, radio transmission systems, etc.

Active Publication Date: 2022-06-21
SOUTHEAST UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a FDD massive MIMO and rate optimal statistical precoding design method and equipment to solve the technical problem of FDD massive MIMO precoding while reducing channel information acquisition overhead and bringing performance improvement

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  • FDD large-scale mimo and rate optimal statistical precoding method and equipment
  • FDD large-scale mimo and rate optimal statistical precoding method and equipment
  • FDD large-scale mimo and rate optimal statistical precoding method and equipment

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Embodiment Construction

[0038] In order to better understand the purpose, structure and function of the present invention, a method and device for designing FDD massive MIMO and rate-optimized statistical precoding of the present invention will be described in further detail below with reference to the accompanying drawings.

[0039] like figure 1 As shown, the FDD massive MIMO and rate-optimized statistical precoding design method disclosed in the embodiment of the present invention includes the following steps:

[0040] Step 1, the base station obtains downlink statistical channel information of each user terminal by using uplink channel estimation and statistical disparity; the uplink statistical channel information and downlink statistical channel information are consistent; the statistical channel information is extracted from the beam domain statistical channel model, The number of steering vectors for this beam-domain statistical channel model exceeds the number of antennas.

[0041] The mode...

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Abstract

The invention discloses an FDD massive MIMO and rate optimal statistical precoding method and equipment. Statistical precoding can effectively eliminate channel state information acquisition overhead compared with traditional precoding methods. Based on the beam-domain statistical channel model, the FDD precoding design is transformed into a maximum ergodic and rate optimization problem under the total power constraint. The optimal solution of this optimization problem can be obtained by using the MM algorithm. In order to simplify the expectation item about the channel in the optimal solution, the deterministic equivalent method is introduced to obtain the approximation of the ergodic and rate, and then the approximate expression of the optimal solution is deduced. Compared with other methods, the present invention can carry out precoding design only by counting channel information, and at the same time, based on the criterion of optimal sum rate, it can effectively suppress the interference between users, thereby improving the performance of the entire communication system, with greater Value.

Description

technical field [0001] The invention belongs to the field of communication technologies, and in particular relates to a design method and device for FDD massive MIMO and rate-optimized statistical precoding. Background technique [0002] Massive Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Ouput) technology can significantly improve the throughput and spectral efficiency of the system by configuring a large-scale antenna array on the base station side, thus becoming one of the key technologies of 5G. Massive MIMO is already used in many other applications and services, including the Internet of Things and drone communications. The base station uses channel information (CSI) to perform precoding design, so as to suppress interference between users. At present, most precoding related research focuses on the time division duplex (TDD) system. Using the mutuality of the uplink and downlink channels, the base station can directly estimate the downlink channel in...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04L25/02
CPCH04B7/0456H04L25/0204
Inventor 卢安安章宇轩高西奇
Owner SOUTHEAST UNIV