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Sine wave

About: Sine wave is a research topic. Over the lifetime, 12183 publications have been published within this topic receiving 93013 citations. The topic is also known as: sinusoid.


Papers
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Journal ArticleDOI
01 May 1974
TL;DR: In this article, several properties of solitary waves that were measured on an easily constructed transmission line of very modest size (50 sections ∼1-m length) were described, including their generation by a pulse or a sine wave, the recurrence phenomena, and the collision of two solitary waves.
Abstract: Several properties of solitary waves that were measured on an easily constructed transmission line of very modest size (50 sections ∼1-m length) are described. Among the properties observed are their generation by a pulse or a sine wave, the recurrence phenomena, and the collision of two solitary waves.

34 citations

Journal ArticleDOI
TL;DR: The linear swept-frequency sine wave has been the only seismic vibrator drive signal seriously used in almost two decades of operational vibrator activity, but there are other drive signals and alterations of this commonly accepted signal which offer improved peak-to-side lobe ratios on signal autocorrelations, as well as significant savings in field data acquisition and subsequent data processing times.
Abstract: The linear swept-frequency sine wave has been the only seismic vibrator drive signal seriously used in almost two decades of operational vibrator activity. However, there are other drive signals and alterations of this commonly accepted signal which offer improved peak-to-side lobe ratios on signal autocorrelations, as well as significant savings in field data acquisition and subsequent data processing times. In fact, one class of input signals allows vibrator signal recordings to have the same time duration as equivalent dynamite signal recordings. Another class provides effective discrimination against periodic interferences such as 60-Hz power-line interference. Fortunately, these characteristics can be combined in the same input signal. The theory which suggests these improvements is outlined, and experimental seismic data which support the theory are shown. Data recorded at identical locations while using one conventional and three alternate input signals of equal bandwidths and energies are compared to show the advantages of the alternate signals.

34 citations

Patent
Mitsuyasu Kachi1, Hirokazu Sakuma1, Tsutomu Kazama1, Yukio Aoki1, Takao Mizutani1 
27 Jan 1995
TL;DR: In this article, the analog-to-digital converters are used to convert the incoming sine and cosine wave signals into digital values, and an arithmetic unit is used for calculating a compensation for errors including offset, amplitude and phase errors.
Abstract: An absolute position detection apparatus which comprises sine and cosine wave generators for generating one or more sets of sine and cosine waves within a cycle, analog-to-digital converters for converting the incoming sine and cosine waves generated by the sine and cosine wave generators into digital values. An arithmetic unit is used for calculating a compensation for errors including offset, amplitude and phase errors on the basis of the digital values from the analog-to-digital converters. In the apparatus, the arithmetic unit operates on a phase angle from phase angles found by the arithmetic performed prior to or during said error compensations and the digital values from the analog-to-digital converters, whereby a low-priced, highly reliable absolute position detection apparatus can be achieved without the addition of compensation circuits to the hardware.

34 citations

Proceedings ArticleDOI
01 Oct 2014
TL;DR: This paper describes a method of generating low-distortion sinusoidal waves using an arbitrary waveform generator (AWG), and experimental results of using such a generator for ADC dynamic performance testing.
Abstract: This paper describes a method of generating low-distortion sinusoidal waves using an arbitrary waveform generator (AWG), and experimental results of using such a generator for ADC dynamic performance testing. With this proposed method, 3rd order harmonics of the generated signal are suppressed simply by changing the AWG program (or waveform memory contents)—AWG nonlinearity identification is not required—and spurious components, generated far from the signal band, are relatively easy to remove using an analog filter; our theoretical analyses, simulations, and experiments showed that a simple passive LC analog filter (with relaxed requirements compared to the one for direct HD3 removal) is sufficient. Our ADC testing results—using signals generated by an AWG with the proposed algorithm, and a simple passive LC LPF—show measurement errors (caused by 3rd order harmonics generated by AWG DAC nonlinearity) half that of previous algorithms.

34 citations

Journal ArticleDOI
TL;DR: A comparative evaluation of programs used in the “equivalent bit” test is described, both in terms of how often each method converged and also of how much computer time each method took to converge.
Abstract: A comparative evaluation of programs used in the “equivalent bit” test is described. Four methods of determining the best-fit sine wave were tested using computer generated data contaminated to varying degrees with white noise. These data were supplemented with actual records of sine waves obtained using fast digitizers with 6- to 12-bit resolution and record lengths of between 512 to 16 000 words. The programs were evaluated for relative accuracy, absolute accuracy, and efficiency, both in terms of how often each method converged and also of how much computer time each method took to converge.

34 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202378
2022157
2021138
2020253
2019344
2018336