Self-adaptive adjustment system and method for carrier communication of low-voltage power line

An adaptive adjustment, power line carrier technology, applied in distribution line transmission systems, line transmission components, line transmission monitoring/testing, etc., can solve the problems of low communication success rate, unsatisfactory, slow communication rate, etc. , to achieve the effect of improving the success rate of communication

Active Publication Date: 2011-01-12
珠海慧信微电子有限公司
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Problems solved by technology

Although this technology has the advantages of strong anti-interference ability, good confidentiality, anti-fading, anti-multipath interference ability, multi-access capability, and easy implementation of code multiple addressing, etc., it is not satisfactory in the actual application process. Problems such as low success rate and slow communication rate

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  • Self-adaptive adjustment system and method for carrier communication of low-voltage power line
  • Self-adaptive adjustment system and method for carrier communication of low-voltage power line
  • Self-adaptive adjustment system and method for carrier communication of low-voltage power line

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Embodiment Construction

[0014] Such as figure 1 As shown, the adaptive adjustment system for low-voltage power line carrier communication provided by this embodiment includes seven functional modules, which will be described separately below with reference to the accompanying drawings.

[0015] The input signal conditioning module converts the input signal into a standard signal that can be recognized by the acquisition device (AD conversion unit) through amplification and filtering operations; this functional module is realized by a hardware circuit, and the signal conditioning function is completed by integrating an operational amplifier and an RC band-pass filter circuit . Figure 2a is a schematic diagram of the input signal, Figure 2b It is a schematic diagram of the standard signal after amplification and filtering.

[0016] The sampling and filtering module converts the above-mentioned standard signal which is continuous in time and in amplitude into a discrete analog signal which is discre...

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Abstract

The invention provides a self-adaptive adjustment system and a method for the carrier communication of a low-voltage power line for automatically adjusting key parameters of the spread spectrum carrier communication of a power line so as to improve the carrier communication reliability of the power line and reduce the bit error rate. The self-adaptive adjustment system comprises an input signal conditioning module, a sampling and filtering module, a link quality detection module, a signal intensity detection module, a comprehensive error detection module, a self-adaptive algorithm adjustment module and a symbol decision module, wherein the self-adaptive algorithm adjustment module comprises a fuzzy normalization part, a fuzzy rule part, an inference engine part and a decision threshold value part. In the invention, a spread spectrum communication decision threshold value is automatically tracked and adjusted through checking the parameters of the link quality, the signal intensity, the comprehensive error, and the like of the communication system so as to ensure that the performance of the communication system reaches the optimum, i.e. the communication success rate reaches a maximum value under the current working condition.

Description

technical field [0001] The invention relates to a system and method for adaptive adjustment of low-voltage power line carrier communication. Background technique [0002] Low-voltage power line carrier communication is the most basic communication method in the power communication system. It uses the power line as the transmission channel, does not need to set up and maintain the line separately, and the structure of the power line is strong, so the power line carrier communication is also unique in the power system. The communication method has been widely used in centralized meter reading, smart home, smart buildings and other fields. However, the low-voltage power line network structure and load are complex, the working environment is harsh, and the signal attenuation is large. Low-voltage power line channel noise interference and time-varying attenuation are inherent defects, which result in low data rate and poor reliability of power line transmission. Serious constrain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/46H04B3/54
Inventor 崔宇昊刘述刚史谦张波邓延康希李开信许永平
Owner 珠海慧信微电子有限公司
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