Clock skew calculation and compensation system and method for PLC module

A clock offset and compensation system technology, applied in time division multiplexing systems, electrical components, multiplexing communications, etc. Effectiveness of communication efficiency and success rate, elimination of reception performance degradation, and reduction of maintenance resources

Active Publication Date: 2022-03-11
HANGZHOU VANGO TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, 1. The calculation of the clock deviation is pre-calibrated at the factory, so that during the use of the equipment, due to aging, the correction value of the clock deviation will become worse and worse
2. Calibrate by carrier signal data. When this method is used in the live network, when the channel is not ideal, due to the existence of noise and various interferences, the accuracy of the calibration will be relatively poor, and the calibration is not ideal. The clock deviation is inconsistent, there are positive and negative deviations, and occasionally there are modules with large deviations, which will form a chaotic situation

Method used

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  • Clock skew calculation and compensation system and method for PLC module
  • Clock skew calculation and compensation system and method for PLC module
  • Clock skew calculation and compensation system and method for PLC module

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Embodiment Construction

[0095] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0096] The embodiment of the present application provides a clock deviation calculation and compensation system and method of a PLC module, which can be applied to application scenarios such as remote data collection of meters, remote control of household appliances, and data analysis and processing of control systems.

[0097] The first embodiment of the present application discloses a clock deviation calculation and compensation system of a PLC module, such as figure 1 As shown, it includes a clock correction module and a PLC module, and the clock correction module can send more than two kinds of signals to the PLC module, at least one of which is a first characteristic signal; the first characteristic signal is the clock correction module interval ΔT is sent to the PLC module in hours, and is used to calculate the clock deviation of the clock correction module...

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Abstract

The invention discloses a clock skew calculation and compensation system and method for a PLC module, the system comprises a clock correction module and the PLC module, the clock correction module is used for sending a first characteristic signal to the PLC module at an interval of delta T hours, and the first characteristic signal is used for calculating the clock skew of the clock correction module and the PLC module; and the PLC module is used for transmitting and / or receiving carrier data, receiving the first characteristic signal sent by the clock correction module, calculating a clock deviation value of the clock correction module and the PLC module according to the first characteristic signal, and performing clock compensation on the carrier data to be transmitted or received according to the clock deviation value. The system and the method can eliminate reception performance reduction caused by clock skew between the PLC modules, can obviously improve communication efficiency and success rate of the PLC modules, and can save installation time and reduce maintenance resources in field use.

Description

technical field [0001] The invention belongs to the field of carrier communication, and in particular relates to a clock deviation calculation and compensation system and method of a PLC module. Background technique [0002] At the physical layer of a communication system, receiver performance is degraded by various time and frequency impairments. In the PLC (Powerline Communication, power carrier communication) module communication system, due to the mismatch between the local crystal oscillator of the transmitter and the local crystal oscillator of the receiver, inter-subcarrier interference (ICI, Inter-Channel Interference) and symbol Inter-Symbol Interference (ISI, Inter-Symbol Interference), which leads to the decline of receiver performance, the increase of bit error rate, and the decrease of communication rate. In more serious cases, normal communication will be completely interrupted. [0003] For equipment used in the field, the crystal oscillator clock will gradua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
CPCH04J3/0644H04J3/0682Y02P90/02
Inventor 张宏亮吴远刚
Owner HANGZHOU VANGO TECH
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