Characterization of Time Variation of the Powerline Channel Frequency Response Simultaneously with Impulsive Noise

Powerline communication systems are used to transmit audio and video transmissions with delay, datarate and QoS requirements. Consequently the knowledge of the channel frequency response has to be as accurate as possible. However, the powerline medium is shared with other devices connected to any socket. When switching, and even during normal operation, these devices can generate some noises (stationary, cyclo-stationary & impulsive), and may cause perceptible variation of channel frequency response. This study tries to establish a link between impulsive noise and a simultaneous variation of the channel frequency response. Indeed, an impulsive noise corresponds to a particular event which may be a sign of a change in the powerline characteristics, and the channel frequency response may be affected by this change. Afterwards, a statistical analysis of the noises linked with a variation of the channel frequency response is performed, and consequently incurred results may help any receiver to anticipate this variation.