Link level to system level simulation interface method based on LTE-A

A system-level simulation, LTE-A technology, applied in the field of link-level simulation and system simulation, can solve the problem of large error between the block error rate and the actual block error rate

Active Publication Date: 2016-10-12
SOUTHEAST UNIV
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Problems solved by technology

[0005] Purpose of the invention: In order to solve the problem that the error between the block error rate predicted by the abstract interface algorithm of the physical layer and the actual block error rate is relatively large under the high-order coding and modulation scheme, the present invention provides an LTE-A-based link-level to An interface method for system-level simulation that improves the accuracy of interface algorithm predictions for high-order coded modulation schemes

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  • Link level to system level simulation interface method based on LTE-A
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  • Link level to system level simulation interface method based on LTE-A

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[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Such as figure 1 Shown is a functional block diagram of the present invention, the interface method from link-level simulation to system-level simulation includes the following steps: setting the network topology of system-level simulation, including: setting channel types, such as frequency selective channels commonly used in LTE simulation and Generate the channel matrix to determine the link parameters between each two nodes, that is, channel information, configure the cell parameters and the transmit power of the symbol, etc.; through corresponding calculation of these parameters, the signal-to-noise ratio on each subcarrier can be calculated, and the It is used as the input of the L2S algorithm; after the effective signal-to-noise ratio is calculated by the L2S algorithm proposed by the present invention, the block error rate performance of the link can be...

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Abstract

The invention provides a link level to system level simulation interface method based on LTE-A. According to the effective signal to noise ratio mapping algorithm based on mutual information of the method, through use of the feature that in the algorithm, parameter compression is carried out on each subcarrier in an averaging linear mode, the idea that compression is carried out through an exponential function is provided. According to the method, firstly, the signal to noise ratio of each subcarrier is calculated; then mutual information corresponding to each signal to noise ratio is obtained in a table look-up mode, and data compression of the exponential function is carried out on the mutual information, thereby obtaining equivalent mutual information; and finally, a predicted block error rate can be obtained through the equivalent mutual information. The problem that the precision accuracy of the interface algorithm in a high-order encoding modulation scheme is low is solved. Through improvement of the interface algorithm, the prediction accuracy of the interface method in the high-order encoding modulation scheme is improved.

Description

technical field [0001] The present invention designs the fields of link-level simulation and system simulation in wireless communication systems, especially an interface method based on LTE-A link-level to system-level simulation Background technique [0002] The simulation of wireless communication system is divided into system-level simulation and link-level simulation. The link-level simulation focuses on point-to-point link-level performance. Starting from the level of bit data through physical layer modeling, it specifically analyzes the impact of the corresponding physical technology of the physical link layer on link performance. The focus of system-level simulation is mainly on a higher level. Based on link simulation, start from the network level to analyze the overall coverage, capacity and other performance of the system. Different from the purpose of link simulation, which is to verify and analyze the physical layer technology, system simulation is mainly to pro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391H04W16/18
CPCH04B17/3912H04W16/18
Inventor 衡伟张清华李翔林爽爽韩冠男
Owner SOUTHEAST UNIV
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