LAUSR

Smart grid networks demand reliable, efficient and real-time energy management by exchanging information. Transmitting and receiving information needs a two-way, secure, reliable and high-speed communication infrastructure, which should be capable to handle impulse noise present in power system. Power division non-orthogonal multiple access scheme can fulfill this requirement through its high spectral efficiency. In this paper, we proposed a composite multiple access model based on orthogonal beamforming (OBF) and non-orthogonal multiple access scheme for exchanging information between smart grid, smart meters (SMs) and other communication units in the presence of impulse noise. We divide a cell in sectors and implement OBF between sectors to reduce inter beams interference using orthogonalization. Within the sectors, we implement power division multiple access to utilize maximum bandwidth with the help of successive interference cancelation scheme. Furthermore, to find the effect of impulse noise on performance of proposed model we consider Gaussian and Laplacian models with Bernoulli arrival rate. Simulation and numerical findings show that the proposed method does not cause interference between SMs and offers $$3\;{\text{Mbit}}/\text{s}$$ 3 Mbit / s higher data rate than the traditional OFDMA systems leading to better system capacity in case of four SMs in a sector of a cell.