Power-line carrier communication method

Abstract

The invention discloses a power line carrier communication method and provides a data package structure used in the synchronization of the receiving and transmitting terminals and its signal encoding transmitting method. With the data package structure used in the synchronization of the receiving and transmitting terminals and its signal encoding transmitting method, the power line carrier communication receiver can effectively realizes the synchronous regulation of the receiving and transmitting terminals, decreases the errors of the time synchronization of the receiving and transmitting terminals, increases the synchronization precision of the communication system, reduces the error rate of the communication system and increases the data transforming efficiency and reliability of the communication system. The data package structure of the power line carrier communication has the synchronization bellwether composed of the synchronization signals. The synchronization signals are output after the orthogonal sine wave or cosine wave sequence encoding with different frequency. The receiving terminal treats the received synchronization bellwether signal to judge whether the receiving terminal and the transmitting terminal are synchronous in the time and the adjusting direction and size and to carry out the synchronization adjusting.

Description

【Technical field】: [0001] The invention relates to a power line carrier communication method, in particular to a method and a device for realizing time synchronization and data transmission between a transmitter and a receiver in the power line carrier communication. 【Background technique】: [0002] The power line carrier communication system consists of a transmitter, a receiver, and a power line connecting the transmitter and receiver. The data information to be transmitted by the user is sent by the transmitter after being modulated, and the receiver demodulates and receives the information after passing through the power line. [0003] In order to ensure that the information sent by the transmitter at the sending end can be correctly demodulated at the receiving end, the receiver at the receiving end must be synchronized with the transmitter at the sending end. There are two types of synchronization in general power line carrier communication systems: (1) time synchroni...

AI Technical Summary

Problems solved by technology

[0005] In the power line carrier communication system, there is strong interference and noise on the power line, and the interference and noise intensity in different locations and different time periods are very different, so that the synchronization error of the zero-crossing detection signal at the sending end and the receiving end varies with the location and There are great changes in different time periods. In addition, due to the inconsistency of the performance of electronic components, it will also have a great impact on the results of the zero-crossing detection circuit.

When there is an error in the synchronization signal obtained by the power line carrier communication system at both ends of the transceiver through zero-crossing detection, the receiving performance of the receiver at the receiving end will decline. When the error is large, the synchronization between the sending end and the receiving end will no longer exist, and the receiver will The signal cannot be received, resulting in the inability of the two parties to communicate

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