A power line communication data processing method, system and device
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A technology of power line communication and data processing, applied in distribution line transmission system, multi-frequency code system, etc., can solve problems such as limiting the bandwidth range and limiting the communication rate of power line communication data transmission, so as to avoid high-order harmonics and improve bandwidth , Improve the effect of communication bandwidth
Active Publication Date: 2016-07-20
兆讯恒达科技股份有限公司
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[0006] However, there is an obvious defect in the existing zero-point voltage signal transmission technology: it will generate the second or higher harmonic of the frequency of the transmitted signal
Therefore, the existence of higher harmonics limits the bandwidth range of the signal that can be transmitted in the channel
Moreover, with the development of multi-carrier technology and the widespread application of Orthogonal Frequency Division Multiplexing (OFDM) technology in power line carrier communication, the existence of harmonic interference has become an important problem limiting the number of available carriers, which greatly limits The data transmission communication rate of the power line communication
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Embodiment 1
[0079] As a possible implementation mode, the power line communication data processing method in the embodiment of the present invention includes a power line communication data transmitter transmitting processing step, and a power line communication data receiver receiving processing step.
[0080] Among them, the transmission processing steps of the power line communication data transmitter, such as figure 2 shown, including the following steps:
[0081] Step S21, detect that the moment when the voltage peak point appears is t 1 , so that the signal is transmitted at the peak point;
[0082] Because the waveform period of the power line communication is 10 milliseconds (ms), as an implementable mode, in the embodiment of the present invention, preferably, the time when the detected voltage peak point appears is t 1 , including the following steps:
[0083] After the zero point is obtained according to the zero point detection, calculate the peak point time = zero point +...
Embodiment 2
[0099]Corresponding to the power line communication data processing method of the embodiment of the present invention, the embodiment of the present invention also provides a power line communication data transceiving system based on Orthogonal Frequency Division Multiplexing (OFDM), such as Figure 4 As shown, including transmitter 1 and receiver 2.
[0100] in:
[0101] The transmitter includes a first peak detection module 14 , a transmitting front-end module 11 , a modulation module 12 and a channel coding module 13 .
[0102] Wherein, the first peak detection module 14 is used for peak point detection and voltage peak point prediction;
[0103] Preferably, the first peak detection module 14 includes a first detection submodule 141, a first prediction submodule 142 and a first peak time point calculation submodule 143, wherein:
[0104] The first detection sub-module 141 is used to detect that the moment when the voltage peak point appears is t 1 , so that the signal is...
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Abstract
The invention discloses a method, a system and equipment for power line communication data processing. The system comprises a transmitter and a receiver. The transmitter comprises a first peak detection module, a channel coding module, a modulation module and a transmission front-end module, wherein the first peak detection module is used for peak point detection and voltage peak point forecast, the channel coding module is used for channel coding, the modulation module is used for modulation of bit stream data output by codes, and the transmission front-end module is used for beginning to transmit power line communication data from a peak time point acquired by detection and continuing for a period of time T. The receiver comprises a second peak detection module, a channel decoding module, a demodulation module and a receiving front-end module, wherein the second peak detection module is used for voltage peak point detection and peak point forecast, the channel decoding module is used for channel decoding, the demodulation module is used for demodulation of demodulation signals, and the receiving front-end module is used for beginning to receive the power line communication data from the peak time point acquired by the detection, continuing for the period of time T, and transmitting the power line communication data to the demodulation module for demodulation after synchronization. According to the method, the system and the equipment for the power line communication data processing, bandwidth of power-line communication is greatly improved, and the number of available carrier waves in the communication is increased.
Description
technical field [0001] The present invention relates to the field of power line communication (PowerLineCommunication, PLC) communication technology, in particular, to a power line communication data transmission orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) data processing method and processing system, and power line communication Transmitter and receiver. Background technique [0002] Power line communication (PowerLineCommunication, PLC) is a communication method in which the power line is used as a communication medium. PLC technology was applied to transmission lines more than 60 years ago for dispatching and commanding communications in power plants and substations. However, it has not been an ideal communication medium for a long time. However, with the continuous advancement of technology , especially the development of modulation technology and microelectronics technology, makes the practical application of PLC possib...
Claims
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