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Channel detection method applicable to power line communication system

A technology for power carrier communication and channel detection, which is applied in distribution line transmission systems, line transmission monitoring/testing, line transmission components, etc., and can solve problems such as complex implementation

Inactive Publication Date: 2019-03-29
WENZHOU UNIVERSITY +2
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Problems solved by technology

The channel detection method based on the training sequence is a commonly used channel detection method in the engineering field, but the traditional channel detection method based on the training sequence needs to obtain the channel distortion first, and then combine the specific form of the transmission filter to finally obtain the equalizer and implement it. quite complicated

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  • Channel detection method applicable to power line communication system
  • Channel detection method applicable to power line communication system
  • Channel detection method applicable to power line communication system

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Embodiment Construction

[0037] In order to make the technical solution of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0038] The invention provides a channel detection method applicable to a power carrier communication system, comprising the following steps:

[0039] Step 1, generate the FZC type polyphase sequence with length n as the training sequence:

[0040]

[0041] Among them, Q and G are mutually prime positive integers, n is a natural number, e is a natural constant, j is an imaginary number unit, and π is the circumference ratio;

[0042] Step 2, let s(k) be the transmitted information data, and the received signal obtained after s(k) is polluted by Gaussian white noise through the channel is x(k), and x(k) is expressed as...

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Abstract

The invention discloses a channel detection method applicable to a power line communication system. A multiphase sequence is generated as a training sequence. A channel detection mathematical model based on the training sequence is set up. A channel detection problem in the power line communication system is converted into a quadratic programming problem. An optimization problem is solved according to a Karush-Kuhn-Tucker (KKT) complementation condition. According to the method provided by the invention, an equalizer can be directly obtained through utilization of the training sequence with low data volume. The method is a direct channel detection method. A time-varying channel updating real-time requirement of the power line communication system can be effectively satisfied.

Description

technical field [0001] The invention relates to the technical field of power carrier communication, in particular to a channel detection method suitable for a power carrier communication system. Background technique [0002] Power carrier communication (PLC) is a unique communication method for power systems. It refers to the technology of using existing power lines to transmit analog or digital signals at high speed through carrier waves. Its biggest feature is that it does not need to re-establish the network. Data transfer is possible. At present, power carrier communication has been widely used in smart distribution network, such as automatic meter reading, advanced metering infrastructure, automotive grid communication, smart home system, building system and intelligent transportation system. The channel of power carrier communication often has frequency selective fading (FSF for short). FSF means that at certain frequency points, the frequency response curve of the ch...

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Application Information

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IPC IPC(8): H04B3/54H04B3/46
CPCH04B3/46H04B3/54
Inventor 阮秀凯周月包乐磊周志立戴瑜兴崔桂华闫正兵蔡启博
Owner WENZHOU UNIVERSITY
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