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Model building and compensation method of nonlinear system

A nonlinear system and compensation method technology, applied in the field of communication, can solve the problems of large number of hidden layers, narrow practical application range, long calculation time, etc., to simplify problem classification, save manpower and material resources, and simplify neural network structure. Effect

Inactive Publication Date: 2006-11-29
HUAWEI TECH CO LTD
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Problems solved by technology

[0006] The disadvantages of the modeling and compensation method based on the backpropagation neural network are: the calculation amount of the method is relatively large, the calculation time is relatively long, and the practical application range is relatively narrow; Requires a relatively large number of network hidden layers and requires longer calculation time

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  • Model building and compensation method of nonlinear system
  • Model building and compensation method of nonlinear system
  • Model building and compensation method of nonlinear system

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Embodiment Construction

[0051] The invention provides a method for modeling and compensating a nonlinear system. The core of the invention is: using a cascade correlation network to establish a unified mathematical model of the nonlinear system and its inverse model.

[0052] The method of the present invention will be described in detail below with reference to the accompanying drawings. The specific processing flow of the method of the present invention is as follows: figure 1 shown, including the following steps:

[0053] Step 1-1: According to the input and output of the nonlinear system, establish a nonlinear system model of the system.

[0054] The present invention first needs to establish a certain nonlinear system model according to the input and output of the nonlinear system. In the present invention, the nonlinear system model is established by using CC (cascading correlation network), and the structure diagram of the CC neural network is as follows figure 2 shown.

[0055] In the CC n...

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Abstract

A modeling and compensating method of nonlinear system includes setting up nonlinear model of said system and confirming parameter of said model according to input and output of nonlinear system, setting up inverse model of said nonlinear model and confirming parameter of said inverse model according to said set-up nonlinear model, carrying out compensation on said nonlinear system by utilizing set up nonlinear model and inverse model.

Description

technical field [0001] The invention relates to the field of communications, and in particular to a method for modeling and compensating a nonlinear system. Background technique [0002] The biggest feature of nonlinear systems is that they no longer satisfy the principles of homogeneity and superposition. In the field of communications, especially wireless communications, it is often necessary to establish mathematical models for nonlinear systems. [0003] For example, in a wireless transmission system, the radio frequency signal will be distorted after passing through a nonlinear wireless channel, resulting in intersymbol interference of the baseband signal. At this time, a certain method needs to be used to establish a mathematical model of the wireless channel, and the mathematical model of the mathematical model needs to be established. parameters, and then use the inverse model of the mathematical model in the receiver to process the received signal to obtain a disto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/06H04B15/00H03F1/32
Inventor 邓杰锋魏海坤
Owner HUAWEI TECH CO LTD
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