A power line communication simulation method and system based on energy detection

Abstract

The present invention provides a power line communication simulation method and system based on energy detection. The method includes: determining the reference parameter Et according to the average intensity E0 of carrier energy and the average intensity N0 of noise of the power line; opening the uplink path and downlink path of the power line; preset sampling frequency; According to the sampling frequency, the voltage intensity of the uplink path and the downlink path is sampled, and the energy mean value Ea of the uplink path and the energy mean value Eb of the downlink path are calculated; respectively, the energy mean value Ea, the energy mean value Eb and the reference parameter Et for comparison; when the energy average value Ea is greater than the reference parameter Et, the voltage value output by the downlink path is set to zero; when the energy average value Eb is greater than the reference parameter Et, the voltage value output by the uplink path is set to zero. Realize that it will not be interfered by signal loopback during the power line channel process, and ensure the accuracy of transmitted data.

Description

technical field [0001] The invention relates to the field of power lines, in particular to a power line communication simulation method and system based on energy detection. Background technique [0002] Existing power line communication equipment, whether narrowband or broadband, basically uses half-duplex communication. The simulation process of the power line channel is as follows: Figure 4 As shown, in the power line channel simulation process, it is inevitable to face the problem of signal loopback. Specifically, set device A as PLC0 terminal, and device B as PLC1 terminal; normal uplink communication is PLC0 terminal sending and PLC1 terminal receiving, the two The signal transmission process between them is: PLC0-"physical connection point 0-"AD0-"DA0-"physical connection point 1-"PLC1. When the carrier signal passes through the physical connection point 1, it will be collected by AD1, and then output to the physical connection point 0 through the downlink path, tha...

AI Technical Summary

Problems solved by technology

[0003] In the downlink communication, the same signal loopback as in the uplink communication will occur. If it is not processed, the following two situations will inevitably occur: 1. For devices with weak anti-interference ability, strong echo will lead to communication quality 2. For devices with strong anti-interference ability, although the strong echo will not greatly affect the communication quality, the channel through which the carrier passes is no longer the simulated model , that is, the signal distortion

Images