Can Power Line Communication Transmit Data Without Interrupting Power Supply?

[yasthicklee]

Hello,
I am new to this environment and I am about to do my final year project with the Power Line Communication.I am having some doubts regarding.Could anyone here explain how the data from my home can be transmitted to the energy station?
some says that the system comes with half-duplex.So if i am sending data,will i be having a power cut?
And if i am sending data with a low power,will that be reaching the energy station or will go to other homes in my neighborhood or even comes back to me??


some one explain

 

[fss]

Start here:

http://en.wikipedia.org/wiki/Power_line_communication

and look at the references on the bottom of the page.

 

[sophiecentaur]

It depends on what frequency you intend to use but RF signals will propagate quite well along transmission lines. Transformers may be a bit of a barrier, though, and you may need repeaters (/ regenerators / high voltage bandpass filters) to get past them. As far as your neighbours are concerned, the problem is the same as for regular telephone lines; they may get some of your signals and, if you all want to communicate, you will need to use different frequency or time slots in a multiplex.

 

[yasthicklee]

It depends on what frequency you intend to use but RF signals will propagate quite well along transmission lines. Transformers may be a bit of a barrier, though, and you may need repeaters (/ regenerators / high voltage bandpass filters) to get past them. As far as your neighbours are concerned, the problem is the same as for regular telephone lines; they may get some of your signals and, if you all want to communicate, you will need to use different frequency or time slots in a multiplex.

thx for the reply friend.In order to differentiate I planned to have either OFDM or CDMA technique in them.Is that feasible to make a Practical Home made CDMA or OFDA kit.
And how can I make a ASK in the 230V 50Hz signal as in my country?

 

[berkeman]

thx for the reply friend.In order to differentiate I planned to have either OFDM or CDMA technique in them.Is that feasible to make a Practical Home made CDMA or OFDA kit.
And how can I make a ASK in the 230V 50Hz signal as in my country?

You need to look up the government regulations for the different communication bands allowed on the powerline segments. There will be one set of rules for in the home, and another set of rules for the higher voltage supply lines and distribution transformers. And as mentioned, powerline comms do not usually make it through distribution transformers. Different comms are used on the two sides of distribution transformers.

 

[yasthicklee]

It seems that Instead of making the modulation in the ASK I found its a bit good in the FSK format.I had a look at the Telephone system making the transfers in dc,LF,HF and in high freq.So I decided to do my project in FSK modulation.
Can I send the digitally modulated signals through the Live wires or should I have to convert that to analog to get that done?