Telecommunication via injection signals Electricity "PLC"

system-plc-ascomJaringan PLC Through Technology PLC (PowerLine Communication), the signal-singal telecommunications can ditumpangkan or diinjeksikan to the electricity network (low voltage) from an external data network. The concept, can dianalogikan that the electric current flows such as sea water, which generate waves and foam. Is the current wave, while the yeast form noisenya. Noise is used by the PLC technology for delivering voice and data signals.

Various PLC technology has been developed and have the ability to access the internet is quite high, even access the Internet through Technology Digital Power Line (above sea level) will be 1 Mbps, 20 times faster connection from the phone / modem standard. Because the PLC is connected to the low-voltage electricity network, the problem will be vulnerable to electrical equipment, which can cause disturbansi.

Internet presence by some of our society is a means of communication that is quite expensive, so only within a limited use only. Can be one of the causes we say, access the Internet through the telephone network is very slow, it raises the cost that we should remove. What is the solution ..? jawabanya Digital Technology is the Power Line.

Electricity distinguished two types, namely Power Flow DC and AC Electric flow. In the DC electricity, the amount of flow or voltage or frequency does not have a straight line / flat. Meanwhile, the AC electricity, the amount of voltage or currents sinusoida shaped waves with a frequency magnitude 50/60 Hz. While in practice, the electricity generated by the central generator in the form of 30 (read: 3-phase), the sequence fasanya disimbolkan the letter R, S, T, and is usually followed by neutral wire (N), depending on the shape of the relationship or the Delta Star.

Run of the flow of electricity in the form of waves sinusoida this, it can be used for voice communication and data signals, known by the name of Powerline Communication (PLC). How do concepts, in this case sederana can dianalogikan that electric current flows such as sea water, which generate waves and foam. Is the current wave, while the yeast form noisenya. Noise is used by the PLC technology for delivering voice and data signals.

However menumpangkan signal to the telecommunication needs in the frequency range of 1 to 30 MHz. Frequency is able to deliver data speeds of up to 2 Mbps - 4.5 Mbps. The implication, with PLC technology, the flow of electricity are not only used to access the Internet, but its development can be used as a phone or meter reading, by installing a modem PLC, which functions to transfer voice and data signals. So if the user wants to be able to communicate with the two point at a time (the internet and phone) on a power cable channels, with the two PLC modem technology, this can be implemented.

PLC as the technology that use electricity to channel menumpangkan voice and data signals, of course, are constraints that are complex enough. This is due to the fact that the various PLC to take place directly on the network where the majority of household electrical equipment operated, consequently, noise levels on the network will be high. Noise level depends on a number of circumstances, such as natural and artificial sources of electromagnetic radiation, physical structure and parameters of the network. Some of the constraints associated with the application of the electricity network is noise, distortion, disturbansi and atenuasi, of course this will affect the quality of voice and data transmission, so that required a modulation method that is able to provide solutions to solve.

Conceptually PLC transmission system is quite simple, namely by "leave" in the telecommunications data signal noise in the electrical energy. However, technically, to menumpangkan signal data needed by low-frequency range of 1-50 Hz and conditions require a stable voltage. On the other, tell the quality of voice and data affected by the bandwidth, frequency of use, and SNR. High bandwidth achieved by using high frequency range or by raising the level of SNR. To raise the level of SNR, needed injection signal higher. While the standard frequency allocated to the PLC is around 1-50 Hz.

PLC must work with the signal power / low frequency. Because of the high-frequency radiation can occur from power cable that can disrupt the frequency of others. This provision contrary to the needs of high SNR as various disturbances can occur. The process of achieving a good SNR value of the constraints faced by the emergence of radiation effects power cable. In the SNR needed to be able to overcome the background noise that may appear.

These problems can be overcome by using two methods of modulation. The first is the CDM Engineering Modulation (Code division multiplexing) or Spread Spectrum. In using this method, the signal information can be scattered in a wide frequency range. The level of the signal information is made with very low expectations will not be subject to the noise level is very high in the PLC. Second, using the Technical Modulation OFDM (Orthogonal Frequency Division Multiflexing). This modulation method is used because many vendors to be quite stable. Modulasinya efficiency can reach 5 bits per Hz higher than other methods of modulation.