A digital power line channel simulation device and simulation method based on multi-port

Abstract

The invention requests to protect a multiport-based digitalized power line channel simulation device and method. The device comprises a radio frequency line for forming a physical transmission medium for the uplink and downlink transmission of a radio frequency signal; a digital-analog signal conversion module for digitalizing a radio frequency analog signal of a power line carrier module or analogizing a digital signal output by a simulation platform; the power line channel simulation platform for constructing digitalized models of power line channels and noise between a concentrator and each ammeter or between different ammeters; a communication control module for realizing the communication of the power line simulation platform and an upper computer and the control of the communication; and the upper computer for realizing the configuration of the channel and noise parameters in the power line channel simulation platform and the monitoring of signal data. Through the adoption of the device and method provided by the invention, the working efficiency is further improved, and the problems of strong electromagnetic interference between the traditional simulation device cables, multiport noise devices and multi-impedance devices are solved at the same time; and a channel support is provided for forming a traceable and unified carrier module communication performance test standard.

Description

technical field [0001] The invention relates to the field of power line communication, in particular to the field of power line channel simulation modeling. Background technique [0002] At present, the mainstream modeling method in the field of power line channel modeling is to construct a real power line environment through a huge power distribution cabinet composed of power line cables with different fixed lengths and different materials in the laboratory. Earlier, it was through multi-stage attenuators. To simulate the attenuation characteristics of the power line channel, however, this method is difficult to reflect the multipath effect of the power line channel. Although the current mainstream solution is closer to the real power line environment, there is a large electromagnetic induction between the cables. The radio frequency signal can be transmitted directly through electromagnetic coupling, and the long-distance cable does not have the attenuation characteristics...

AI Technical Summary

Problems solved by technology

[0002] At present, the mainstream modeling method in the field of power line channel modeling is to construct a real power line environment through a huge power distribution cabinet composed of power line cables with different fixed lengths and different materials in the laboratory. Earlier, it was through multi-stage attenuators. To simulate the attenuation characteristics of the power line channel, however, this method is difficult to reflect the multipath effect of the power line channel. Although the current mainstream solution is closer to the real power line environment, there is a large electromagnetic induction between the cables. The radio frequency signal can be transmitted directly through electromagnetic coupling, and the long-distance cable does not have the attenuation characteristics that it should have; secondly, it cannot reflect the relationship between the channels of different ammeter lines in the same station area; thirdly, the laboratory simulation The cost of equipment is too high and the control is complicated; third, multiple signal generators are required to generate power line noise when injecting noise into multiple power line channels; fourth, the impedance characteristics are uncontrollable; fifth, fixed cables cannot provide enough many research samples

[0003] To sum up, the traditional technical methods are not flexible enough, the channel modeling is not accurate enough, the correlation between channels cannot be reflected, and the operation is complicated.

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