Processing results of real seismic images show that, under the condition of constant structure relation and signal energy of 80%-90%, the SNR increases of seismic images with high SNR and low SNR are about 9dB and 15dB, respectively.
The instrument has already been used actually in monitoring of earthquake precursors,oil development,has achiered the measurement precision of 0.1% under the enviroment of abominable measurement of field(SNR 20 dB).
4. It is put forward to adopt three-point exponential approximation nonlinear smooth filter and logarithm equal-interval based on geometry average approximation after researching on improving later signal noise ratio of transient electromagnetic signal.
An increase in the constant component, determining a static asymmetry of the potential, leads to a decrease in the signal to noise ratio as compared to the symmetric case.
The influence of the width of the main spectral line of the chaotic drive signal on the signal to noise ratio at the response system's output has been studied.
Then the relation between bandwidth efficiency and signal to noise ratio is discussed.
Theory and experiment demonstrate that the secure communication by small time continuous feedback method does not require the system to be divided into subsystems, and has no limitation of signal to noise ratio.
the same convergence factorc can be used within a fairly wide range of signal to noise ratio (SNR) of input signal.
It is demonstrated that a three-level medium can be used to convert the carrier wave frequency without decreasing the signal/noise ratio.
The calculation of the information capacity of the three-dimensional hologram is reduced to analysis of a set of multiplexed holograms each of which possesses a finite signal/noise ratio determined by the dynamic range of the holographic medium.
We studied, on a Gaussian peak (and on two badly defined peaks) disturbed by noise, the influence of sampling rate, smoothing parameters, signal/noise ratio, dead band limits and peak shape when measuring area.
The simulation indicates that the PAPR of at least 99.9% OFDM symbol is below 6dB after 2 Nyquist rate clipping, and the performance of BER has 1dB SNR (signal noise ratio) loss.
The signal/noise ratio was improved, allowing us to measure the intensity and frequency dependence of the loss rate due to FSC.