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A cross-layer optimization design method in large-scale mimo system

A technology of cross-layer design and optimization method, which is applied in the direction of transmission system, digital transmission system, radio transmission system, etc., can solve problems such as cross-layer optimization, and achieve the effect of reducing costs

Inactive Publication Date: 2020-11-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

None of the above literatures has done research on the cross-layer optimization problem under massive MIMO, so it is urgent to optimize the cross-layer design of AMC combined with HARQ in massive MIMO

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  • A cross-layer optimization design method in large-scale mimo system
  • A cross-layer optimization design method in large-scale mimo system
  • A cross-layer optimization design method in large-scale mimo system

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Embodiment Construction

[0017] In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.

[0018] The hardware devices involved in the method of the present invention include a centralized large-scale antenna base station (BS, Base Station) arranged in the center of the cell, and a mobile station (MS, Mobile Station) in the cell. In this embodiment, the base station is equipped with M antennas, and there are K single-antenna mobile stations in the cell. Define G=HD 1 / 2 is the uplink channel matrix, where H∈C M×K is the small-scale fading matrix from the mobile station to the base station, D∈C K×K is the large-scale diagonal fading matrix from the mobile station to the base station, including shadow fading and path loss, and its diagonal elements are [D] kk = β k =s k (d 0 / d k ) v , where s k is shadow fading, d k is the dis...

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Abstract

The invention provides a cross-layer optimized design scheme combining an AMC with an HARQ in a large-scale MIMO system. The cross-layer design scheme is provided for the large-scale MIMO under the constraint of a maximum packet loss probability by taking maximization of average spectrum efficiency of the large-scale MIMO system as an optimization target, and using a modulation mode of data transmission of the large-scale MIMO system and a packet error rate of the HARQ mechanism as optimization variables. According to the method provided by the invention, the relative high computing complexityis not needed, and compared with the traditional cross-layer optimization scheme, the method provided by the invention can effectively improve the average spectrum efficiency of the system

Description

technical field [0001] The invention belongs to the field of mobile communication, relates to a cross-layer optimization design method of a mobile communication system, and mainly relates to a cross-layer optimization design scheme and a suboptimal simplification scheme in a massive MIMO system. Background technique [0002] In a wireless communication network, due to the existence of channel fading, the performance of the system will be greatly weakened. A technology that can reduce the impact of channel fading on system performance is Adaptive Modulation and Coding (AMC, Adaptive Modulation and Coding) technology. AMC can dynamically adjust the transmission rate under a time-varying channel. It has been widely used in the physical layer. research and application. However, in order to achieve high reliability of the physical layer, the AMC technology must use a smaller-sized constellation modulation to reduce the transmission rate. [0003] Another technology to alleviate...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04B7/0413H04B7/06H04B7/08
CPCH04B7/0413H04B7/0626H04B7/0632H04B7/0857H04L1/1816H04L1/1825
Inventor 文犇犇虞湘宾潘青腾涛储君雅汪曦柳涛
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS