There is a need for alternatives to traditional wideband wireless networks to exploit the advances in broadband delivery of communications. Many locations do not lend themselves to installation of network cables or wireless access ports. One alternative that has shown promise is the use of powerlines. It has been demonstrated that powerlines may be suitable for high data rate communications by using OFDM in high the frequency band (> 0.5 MHz). However, use of the high frequency band makes the system more sensitive to the structure of the power grid. Previous work has shown that the powerline has potentially fatal attenuation and phase distortion. This paper presents a novel algorithm for blind signal separation of the multiple-input-single-output system (MISO) for residential powerline networks using the low frequency band (< 500 kHz). The algorithm has the potential to achieve a raw bit rate of up to 1 Mbps per individual transmitter or source. This data rate can be achieved by using bandwidth efficient ASK-like modulation scheme combined with the Finite Alphabet (FA) property of binary signals and the Loading Impedance (LI) technique that allows the received signal to be blindly separated. By applying the underdetermined blind signal separation (uBSS) algorithm, the complexity of information addressing and multiplexing can be reduced.
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