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Power lines are characterized by high, unpredictable and time variant noise. The latter are summation of background noise, impulsive noise and narrowband interferences. The background noise is usually taken to be constant in simulation of power line channels due to its slow change. In this paper, the time dependency of power line background noise in an indoor power line setting and its effect on channel...
Power lines can be used for communication purpose. However, the channel is highly frequency selective arising from discontinuities in the network. In this work, the effect of tapped branches in different topologies (STAR and BUS) is studied. The frequency selectiveness is measured in terms of the Coherence Bandwidth. It is found that the Coherence Bandwidth is more for STAR than a BUS one. In STAR...
Obtaining the characteristics of a channel plays an important role in communication. Power lines are very different from other channels available and characterized by time variant notches that make it a harsh media for data transfer. Predetermination of the transfer function is required in many mitigation schemes of communication. In this work, a novel method is described to estimate the transfer...
The paper studies the background noise characteristics of a typical indoor power line (PL) in India. The noise decreases rapidly with frequency and can be considered as white beyond 5 MHz. The time variation of the background noise at every frequency in the non‐white region is modeled and compared in different environments which include laboratory and factory setups. In all cases, the background noise...
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