Power line communications –PLC– is a technology that uses the electric grid for data transmission. Although the electrical channels were not designed to carry data, the implementation of PLC allows the using of a single channel for both electric and information transmission. Even tough the PLC technology initially aimed at transferring low rate control data between electrical stations, the communications over electric channels have been widely implemented not only for control data transmission but also for establishing high rate data, voice and video communications. Communications by power lines, begun as a slow analog communications technology, and recently and recently has become in a wide band technology that has been compared with wireless LAN solutions [1]. High-speed home network solutions have been developed to provide connectivity by wireless or wired mediums including 802.11 –WLAN–, 802.15 –WPAN– and high speed 1394. One of PLC's greatest advantages is the use of low power residential lines with non impact over the electrical circuits, sharing the medium for both power and communications solutions. Electric companies invest on wired Internet access to achieve low cost solution for fixed Internet access as last mile solution and they can use the system to gain control over energy meters and it can be used for demotic applications using electrical appliances networks. The initial PLC standard for PLC home networking is HomePlug 1.0 [2] for LAN connectivity at every power outlet, and it has been implemented in a wide variety of commercial equipments such as routers, bridges, wireless access points, audio end points, speakers, VoIP phones and security cameras. HomePlug AV, supports entertainment applications such as HDTV and home theater throughout the home without new wires and provides this capabilities at competitive costs [3]. Recently, Telecommunications Industry Association –TIA– has adopted HomePlug 1.0 to be published in its standard TIA 1113, as the first multi-megabit power line communications standard approved by American National Standards Institute [4]. The first an only –ANSI– PLC standard defines operations, functions and interface characteristics of a system for medium speed networking using the medium of power line wiring based on Orthogonal Frequency-Division Multiplexing –OFDM–. 18