The investigation of the conditions of registration of the indirect nuclear quadrupole resonance signals
... allows to increase of the indirect nuclear quadrupole resonance are investigated. The proposed method based on the stochastic resonance phenomena in the input electronic circuits of spectrometer. This effect allows provide the essential raise of the signal-to-noise ratio.
С., Гречишкина Р.
В., Шпилевой А.
А., Персичкин А.
А., Хун Хео
Оптика и спектроскопия.
. 94, №
Neiman A., Shimansk-Geier ...
Research of process in bistable system when passing the mix of the harmonious signal and «white» noise
In the work the mechanism of compound harmonic signal and noise through the bistable system which role carries out Schmitt's trigger is considered. Dependence of signal-to-noise ratio on different factors is shows. Necessary conditions for ensuring increase of the signal-to-noise ratio at the output of the system are defined. The decision on practical implementation of the effect in electronic circuits of various purposes is ...
Generalized model of a satellite information transmission channel using Nyquist shaping filters
... demodulator and a decoder based on the Witterby algorithm are presented in this article. As a result of verification of the model, it is shown that in the absence of additive noise, the Nyquist filter eliminates intersymbol interference. The gain in the signal-to-noise ratio (SNR), at which the set value of the bit error rate (BER) is achieved, can be up to 9 dB when the rounding factor of the Nyquist filter is reduced from 0.9 to 0.3.
Volkhonskaya E. V., Korotey E. V., Vlasova K. V.
satellite channel, Nyquist ...
Seven stages of ADC connection for effective analog-to-digital conversion, minimizing noise elements
High-frequency transformations require to correctly design the gain unit before the analog-to-digital converter. To achieve the optimum signal-to-noise ratio, you need to select the correct ADC, and also configure the circuit to receive the signal. The authors focus on several stages for successful conversion of an analog high-resolution signal.
1. Катанович А. А. Комплексы и ...
Estimation of Target Elevation Angles in Meter Radars
... interference has no systematic errors in estimates of elevation angles, as the low correlation and the large correlation of direct and reflected waves. This method solves the problem of estimating the angles of the place in the range of 0,5 ÷ 85° with a signal-to-noise ratio of ≈ 30 dB.
1. Перов А. И. Статистическая теория радиотехнических систем : учеб. пособие. М., 2003.
2. Тихонов В. И. Оптимальный прием сигналов....
The application of adaptive wavelet filtration for detection of signals of nuclear quadrupole resonanse
The article presents a new approach to signal processing with low signal-to-noise ratio. The approach is based on preliminary statistical
analysis of the noise based on wavelet transform coefficients and the adaptive and threshold methods. Special attention is paid to the automatic
detection of the threshold on the basis of statistical ...
Improving the efficiency of wavelet signal processing of NQR signals with modified Morlet basis functions
... Processing Letters. 1996. Vol. 3. P. 10—12.
Hsuen-ChyunShyu, Yuh-Sien Sun.
Construction of a Morlet Wavelet Power Spectrum // Multidimensional Systems and Signal Processing. Vol. 13, N 1. P. 101—111.
B., Healy D.
Signal-to-noise ratios and effective repetition times for wavelet encoding with wavelet packet bases // Journal of Magnetic Resonance.
Molchanov S., Mozjukhin G., Mershiev I., Kupriyanova G.
nuclear quadrupole resonance, wavelet ...