Topic
Impulse noise
About: Impulse noise is a research topic. Over the lifetime, 4816 publications have been published within this topic receiving 63970 citations.
Papers published on a yearly basis
Papers
More filters
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08 Oct 2007TL;DR: Simulation results show that the proposed novel impulse noise cancellation algorithm can improves OFDM channel estimation performance significantly under impulse noise environments.
Abstract: Impulse noise is prevalent in urban and indoor radio channels where OFDM system is deployed. In this paper we propose a novel impulse noise cancellation algorithm for OFDM channel estimation under impulse noise. The algorithm first calculates the frequency domain difference on pilot subcarriers between the received signal and the recovered signal from least square channel estimate. Then the difference is used to estimate a sufficient statistics of the impulse components of time domain noise. Finally the impact of the impulsive noise components on the original channel estimation is cancelled to produce a new channel estimate. Simulation results show that our algorithm can improves OFDM channel estimation performance significantly under impulse noise environments.
24 citations
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07 Apr 2008TL;DR: In this paper, the authors proposed a dual-speed monitoring of impulse noise in the form of short-term and long-term monitoring, which ensures that dynamic changes in the impulse noise environment are quickly addressed and also ensures better characterization of multiple impulse noise sources.
Abstract: Systems and methods for monitoring impulse noise are described. At least one embodiment is a method, which comprises detecting whether impulse noise is present and in response to detecting the presence of impulse noise, performing time domain analysis to determine whether one or more impulse noise sources are present based on minimum interarrival time and maximum impulse length. The method further includes performing frequency domain analysis to estimate frequencies associated with the one or more impulse noise sources and based on the time domain analysis and frequency domain analysis, providing a total number of impulse noise sources and frequencies associated with the impulse noise sources. In this regard, the embodiments described herein provide dual-speed monitoring of impulse noise in the form of short-term and long-term monitoring. The use of dual-speed monitoring ensures that dynamic changes in the impulse noise environment are quickly addressed and also ensures better characterization of multiple impulse noise sources in order to provide better impulse noise protection.
24 citations
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TL;DR: It is shown that the filter has characteristics superior to those of its median-based counterparts while the hardware implementation is much simpler.
Abstract: A 2-D, multishell median-based filter for real-time video signal processing is presented. The device is able to remove impulse and missing line noise in real-time without blurring sharp video images. A prototype using 75 standard transistor-transistor logic (TTL) chips has been realized on one single speedwire prototype board of size 17*30 cm/sup 2/ and its structure is suitable for VLSI implementation. The statistical performance of the nonlinear filter has been investigated and compared with that of standard 2-D median filters. It is shown that the filter has characteristics superior to those of its median-based counterparts while the hardware implementation is much simpler. >
24 citations
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26 Mar 2006
TL;DR: A noise model is proposed and is then used in communication software, simulating the link, for determining the system performance in terms of erroneous bits or frame errors.
Abstract: This paper deals with the characterization of impulsive noise on in-vehicle power lines and the impact of this noise on communication performance. After briefly presenting the communication system, the principle of noise measurement is described and a statistical analysis of impulsive noise is carried out. A noise model is proposed and is then used in communication software, simulating the link, for determining the system performance in terms of erroneous bits or frame errors. The chosen communication standard is the one proposed by the HomePlug 1.0 for PLC indoor communication
23 citations
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TL;DR: The new AHAAH model with ICE as the dose metric is adequate for use as a medical standard against impulse noise injury and the transfer functions from the new model are in good agreement with those of the human ear.
23 citations