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Showing papers on "Impulse noise published in 1970"




Patent
13 May 1970
TL;DR: In this paper, the blanking system for grounding the signal path of a receiver during the existence of impulse noise, including field effect transistor blanking elements connected across the sections of a Butterworth filter, is described.
Abstract: The blanking system, for grounding the signal path of a receiver during the existence of impulse noise, includes field effect transistor blanking elements connected across the sections of a Butterworth filter located in the signal path. The field effect transistors are biased so that they produce virtually no blanking pulse injection, switching transient insertion or intermodulation between undesired signals. Thus, there need not be as much selectivity in the stages of the receiver preceding the blanker thereby facilitating an increase in the blanking rate of the blanker as compared to blankers utilizing bipolar transistors or diode-blanking elements. In addition, the blanking system includes desensitizing circuitry for reducing saturation of the noise detector otherwise caused by radio frequency signals occurring in the noise-sampling channel.

5 citations


Dissertation
01 Jan 1970
TL;DR: This thesis is concerned with the design of novel equipment to be used as part of the data modem, thereby enabling data to be transmitted at a high rate, and with much reduced error rate.
Abstract: Inter-symbol interference and impulse noise are the two main factors which detract from the use of the telephone network as an efficient data transmission system Present data modems (the interfaces between the line and the data source) when used on the network, operate at low data rates and tend to deliver data with excessive errors This thesis is concerned with the design of novel equipment to be used as part of the data modem, thereby enabling data to be transmitted at a high rate, and with much reduced error rate [Continues]

4 citations


Journal ArticleDOI
TL;DR: The single impulse, 95% protection, and grazing incidence correction factors of the CHABA damage‐risk criterion were validated and grazing‐incidence shock waves produced comparable results when they arrived at the ear from the front and from the rear.
Abstract: Seventy‐six subjects were exposed to single impulse noises produced by two small shoulder‐fired rockets, and TTS2 was compared with the CHABA limits. The single impulse, 95% protection, and grazing incidence correction factors of the CHABA damage‐risk criterion were validated. Grazing‐incidence shock waves produced comparable results when they arrived at the ear from the front and from the rear.

2 citations


Journal ArticleDOI
01 Jul 1970
TL;DR: A correlation technique is used to detect frequency-modulation noise impulses and provides a 2-dB extension in the FM threshold, which allows the impulse-detection system to be independent of the modulating signal level and frequency deviations.
Abstract: A correlation technique is used to detect frequency-modulation noise impulses. When implemented in an impulse-noise-cancellation system, this technique provides a 2-dB extension in the FM threshold. It also allows the impulse-detection system to be independent of the modulating signal level and frequency deviations.

1 citations


Journal ArticleDOI
TL;DR: In this paper, the authors dealt with the suppression of harmonic signal interference radiated from a group of high power short wave transmitters and the experimentation of a successful method in which the interfering signal was deliberately picked up and injected into the TV signal at the receiver and with equal amplitude and opposite phase.
Abstract: The television receiver is confronted with three types of interference, viz. reflections, signal interference and impulse noise. This paper deals with the suppression of the harmonic signal interference radiated from a group of high power short wave transmitters and the experimentation of a successful method in which the interfering signal was deliberately picked up and injected into the TV signal at the receiver and with equal amplitude and opposite phase.

1 citations


Journal ArticleDOI
01 Jan 1970
TL;DR: A new design of 2D median filter is presented that utilizes a simple conditional filtering technique, executes fewer computations than related designs while achieving superior image quality.
Abstract: Impulse noise removal is a very important preprocessing operation in many computer vision applications. Usually it is accomplished by median filter with excessive sorting and therefore large power. This paper presents a new design of 2D median filter that utilizes a simple conditional filtering technique, executes fewer computations than related designs while achieving superior image quality. Experimental FPGA implementation of the proposed filtering scheme is compact, fast and low-power consuming.

1 citations


01 May 1970
TL;DR: Probability density functions for quantization noise, continuous wave interference, impulse noise, and atmospheric noise were derived in this paper for estimating the probability density function of quantization noises.
Abstract: Probability density functions for quantization noise, continuous wave interference, impulse noise, and atmospheric noise